A main group element has 81 protons and an estimated nuclear charge of +3. Therefor, the element has 84 electrons and can be on in Group 3A of the Periodic Table.
What element has a nucleus with 81 protons?With the atomic number 81 and the chemical symbol Tl, thallium is one of the elements.
What impacts the human body does thallium have?When consumed in large quantities, thorium can have negative effects on your nervous system, heart, lungs, liver, and kidney. After being exposed to high levels of thallium for a short time, symptoms like temporary hair loss, vomiting, and diarrhea are possible.
Thallium is regarded as a cumulative poison that can have a negative impact on one's health and cause degenerative changes in numerous organs. The nervous system experiences the most negative effects.
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Hybridization predicts geometry best for:
A. small atoms
B. large atoms
C. electronegative atoms
D. gaseous atoms
Covalent bonds are formed when two or more atoms (often...) share electrons. Better (more stable) than larger formal charges are smaller ones.
Does molecular geometry or electron geometry underlie hybridization?The electron geometry is the foundation for hybridization. Observe the VSEPR Table to ascertain the hydridization of a molecule's core atom. How do sp3 orbitals come into being? The combination of one s and three p orbitals results in four sp3 orbitals.
What are the distinctions between shape and geometry in hybridization?When a molecule's geometry shows how bond pairs and lone pairs are arranged around the central atom as well as the coordination number of the molecule. The lone pairs around the central atom.
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A chemist prepares a solution of potassium permanganate (KMNO4) by measuring out 4.6 umol of potassium permanganate into a 300.mLvolumetric flask and filling the flask to the mark with water.Calculate the concentration in mmol/Lof the chemist's potassium permanganate solution. Round your answer to 2 significant digits.
The concentration of potassium permanganate solution is 0.015 mM.
Use the equation given below to calculate the molarity of solution,
Mili molarity of the solution = [Mili moles of solute × 1000]/[Volume of solution in mL]
Given,
Moles of the solute = 4.6 × 10⁻³ mmol
Volume of the solution = 300 mL
Substituting the values we get,
Mili molarity of the solution = [Mili moles of solute × 1000]/[Volume of solution in mL]
Mili molarity of the solution = [4.6 × 10⁻³ × 1000]/300 = 0.015 mM
Hence the mili molarity of the solution of potassium permanganate is 0.015 mM.
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A student runs 7km in 2 hours to train for sports.what is the students average speed
The students average speed of the student is 3.5 km/h.
What is speed?Speed is known to be calculated as the ratio of distance traveled and time traveled. It is a scalar quantity since it only has magnitude and not direction. Velocity is the percentage of time an object moves along a path, and Velocity is expressed as the rate and direction of an object's movement.
The mathematical calculation of speed is relatively simple, calculating the average velocity of an object by dividing the distance traveled by the time it took the object to travel that distance. Velocity, on the other hand, is mathematically complex and can be calculated in different ways depending on what information is available about the object's motion.
Speed = Distance/Time
Speed = 7km/2h
Speed = 3.5 km/h
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If 24.65 mL of 1.12 M NaOH are needed to completely react with the acetic acid, how many moles of acetic acid are contained in the sample?
If 24.65 mL of 1.12 M NaOH are needed to completely react with the acetic acid then 0.0275072 mol of NaOH is present in the sample.
What is acetic acid?Acetic Acid is the colorless acidic and organic compound with the organic formula of CH3COOH.It has a Molar mass of 60.052 g/mol.
Uses:Used as :
Food preservativeFood additiveFor making ink , dye photographic chemicals and pesticides.Solution:As per the given data i.e. :
Volume of NaOH= 24.65 mL=0.02456L
Molarity (M) of NaOH= 1.12 M
The reaction taking place is :
NaOH + CH3COOH →CH3COONa+ H2O
Now to find the no. of moles in NaOH =
moles in NaOH = V in L * M
moles in NaOH= 0.02456 L * 1.12 M
moles in NaOH= 0.0275072 mol
Hence 0.0275072 mol of NaOH is present in the sample.
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0.0275072 mol of sodium hydroxide are present in the sample if 24.65 mL of 1.12 M NaOH are required to thoroughly react with the acetic acid.
Acetic acid: what is it?
Acetic acid is an organic, colorless molecule with the chemical formula CH3COOH.
Its molecular weight is 60.052 g/mol.
Uses:
used for
Preservative for food
food supplement
for the production of insecticides, dyes, and photographic chemicals.
Solution:
Given the information, namely:
NaOH volume: 24.65 mL (0.02456 litres).
NaOH has a molarity (M) of 1.12 M.
The following reaction is occurring:
CH3COONa + H2O = NaOH + CH3COOH
How many moles are there in NaOH?
NaOH moles = V in L * M
moles = 0.02456 L * 1.12 M in NaOH
mol in NaOH = 0.0275072 mol
There is therefore 0.0275072 mol of NaOH in the sample.
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You heat 1.237 g of a mixture of Fe3O4 and FeO to form 7.237 g Fe2O3. The mass of oxygen reacted is.
The two main postulates that was given by Antoine Lavoisier are, oxygen play an important role in combustion and the other is mass of the reactant and product is conserved. Therefore the mass of oxygen reacted is 6gram.
What is law of conservation of mass?According to Law of conservation of mass, mass can neither be created nor be destroyed. Mass can only be transformed from one form to another. The law of conservation of mass was given by Antoine Lavoisier. Every reaction in nature follow the law given by Antoine Lavoisier that is mass is always conserved.
Fe[tex]_3[/tex]O[tex]_4[/tex]+ FeO +oxygen [tex]\rightarrow[/tex] Fe[tex]_2[/tex]O[tex]_3[/tex]
Mass of Fe[tex]_3[/tex]O[tex]_4[/tex]+ FeO =1.237 Grams
Mass of Fe[tex]_2[/tex]O[tex]_3[/tex]= 7.237 grams
According to law of conservation f mass
Mass of Fe[tex]_3[/tex]O[tex]_4[/tex]+ FeO + mass of oxygen = Mass of Fe[tex]_2[/tex]O[tex]_3[/tex]
Substituting the values we get
1.237+ mass of oxygen = 7.237
mass of oxygen =6gram
Therefore the mass of oxygen reacted is 6gram.
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What causes the colorful images seen in the art
Answer:
Explanation:
Color is caused by the way light bounces off of objects. Certain objects only reflect certain frequencies of light, which is what makes up color. For example, when the sun shines on earth (which, the sun shines white light, which is made of all colors), lets say it reflects off of an apple tree in a field. The tree's leaves will reflect green light because of the chloraphyll inside its cells. However, if the light reflects off of one of the apples on the tree, red light is seen because of the nutrients inside of the skin of the apple. In art, color is very important, so people have found ways to use paint (which is in all colors) to essentially mimic the effect that light has on the real world.
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Which of the following reactions are used in the synthesis of the pheromone disparlure from acetylene?
A) Catalytic hydrogenation with Lindlar catalyst
B) Epoxidation
C) Acetylide Substitution
D) Syn dihydroxylation
E) Catalytic hydrogenation with 10% Pd/C
According to the given statement Catalytic hydrogenation with Lindlar catalyst, Epoxidation and Acetylide Substitution.
What is a acetylene used for?The fabrication industry uses acetylene for many major applications. It is the only fuel gas that can be used for welding. It is also ideal for brazing, cutting, flame gouging, spot heating, hardening, texturing, cleaning, and thermal spraying many materials.
Why is acetylene so explosive?Acetylene gas poses an additional hazard to other flammable gases as it is also reactive. Under certain conditions, even in the absence of any air or oxygen, it can decompose explosively into its constituent elements, carbon and hydrogen.
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No Marks. To determine what portion of the question you have correct, check question score at the top of the assignment. Select the stronger base or acid in each pair (A or B). Note that CH3 and CH 2 groups are electron donating groups, i.e., they place electron density on the atoms to which they are attached. Select the stronger base. Stronger base CINH2 NH3 ---Select--- NCI3 NF3 ---Select--- ClO2- CIO ---Select--- Select the stronger acid в Stronger acid H2Se04 H2SO3 |--Select-- H2Те H2S ---Select-- CH3COOH CF3COOH | ---Select--
These are the stronger base or acid in each pair:
Stronger base
ClNH₂ > NH₃ (A) NCl₃ > NF₃ (A) ClO₂⁻ < ClO⁻ (B)Stronger acid
H₂SO₄ > H₂SO₃ (A)H₂Te > H₂S (A)CH₃COOH < CF₃COOH (B)What affects the strength of the base and acid of a molecule?The strength of the base and acid of a molecule is strongly dependent on its bond and structure. The weaker the H-A bond, the lesser the required energy to break the molecule. Hence, the proton leaves the molecule more easily and the molecule will become a stronger acid. It makes compound with stronger bond tends to have stronger basicity.
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A mixture of 0.469 M H2O , 0.380 M Cl2O , and 0.712 M HClO are enclosed in a vessel at 25°C .
H2O(g)+Cl2O(g)↽−−⇀2HOCl(g)c=0.0900 at 25°C
Calculate the equilibrium concentrations of each gas at 25°C .
The equilibrium concentration of H2O,Cl2O, HOCl are 0.3304, 2414,0.5734 respectively.
According to the given reaction
Kc= [tex]\frac{[H2O]*[Cl2O]}{[HOCl]^{2} }[/tex] so after reaching equilibrium the concentration of H2O,Cl2O, HOCl are 0.469-x M, 0.380-xM, 0.712+2xM respectively. And Kc given is 0.9 thus
0.9=[tex]\frac{(0.712+2x)^{2} }{(0.469-x )(0.380-x)}[/tex]
Now by solving this we come to a second order differential equation
3.1[tex]x^{2}[/tex]+2.0839x-0.346564=0
Which was solved and getting the value 0.1386.
Thus the value of [H2O] , [Cl2O] , [HOCl] at equilibrium is 0.3304, 2414,0.5734 respectively.
What is equilibrium?
When rate of a forward reaction is equal to the rate of a backward reaction.
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The modern periodic table waspropased bay lather meyer
Dmitri Mendeleev and Lothar Meyer independently developed the periodic law in 1869. Mendeleev developed the first periodic table, which was quickly followed by Meyer.
What is periodic table ?The periodic table, also known as the periodic table of the elements, is an arrangement of chemical elements in rows and columns. It is widely used in chemistry, physics, and other sciences, and is widely regarded as a chemistry icon.
Meyer is best known for his contribution to the periodic table of elements. He observed, as did John A. R. Newlands in England, that arranging the elements in the order of their atomic weights resulted in groups of similar chemical and physical properties repeated at regular intervals.
Thus, Mendeleev developed the first periodic table, which was quickly followed by Meyer.
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Convert 9.8 x 1023 nanoliters to liters.
Round your answer to the proper number of sig figs.
Do not enter a unit, just the number.
Enter your answer using scientific notation.
x 10^ liters
Blank 1: Put only the coefficient.
Blank 2: Put only the exponent on the power of 10.
Is the reaction as written endo Or exothermic? Right click on the flask and choose "thermal properties' You can now change the temperature between 0 and 99 deg C.Heat or cool the system until you have perturbed the equilibrium. Then apply LeChatlier'$ principal to determine if it is exothermic or endothermic.
Answer:
Image result for he first thing, PH, is really influenced by the way the pollutants are discarded, for example, if a factory decides to throw their pollutants inside a very good and not polluted river, this river will change how it chemically works, and through that, the PH will change, it can turn into a more acid or basic river, depending on the components that were thrown there. I learned from conducting this lab that every act of the human race affects the environment as a whole, and the main thing to pay attention to in this experiment is that, everything is linked to one another in some way.
Even small changes in pH can shift community composition in streams. This is because pH alters the chemical state of many pollutants (e.g., copper, ammonia), changing their solubility, transport and bioavailability. This can increase exposure to and toxicity of metals and nutrients to aquatic plants and animals
Explanation:
Draw circle models to show how potassium iodide (KI) and hydrogen peroxide (H₂O₂) could
create water and oxygen (O₂). Label your circle models with molecular formulas and draw
box around the atoms that are left over.
To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. Therefore, the balanced equation can be written as
H[tex]_2[/tex]O[tex]_2[/tex] + 2KI [tex]\rightarrow[/tex] I[tex]_2[/tex] + 2KOH
What is Balanced equation?Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, displacement reaction.
The other characteristic of balanced reaction is that physical state should be written with each compound or molecule on reactant and product side. Physical state should be written in brackets. s means solid, l means liquid, g means gas. The balanced equation for the given reaction can be given as
H[tex]_2[/tex]O[tex]_2[/tex] + 2KI [tex]\rightarrow[/tex] I[tex]_2[/tex] + 2KOH
Therefore, the balanced equation can be written as
H[tex]_2[/tex]O[tex]_2[/tex] + 2KI [tex]\rightarrow[/tex] I[tex]_2[/tex] + 2KOH
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See page 467
17 Question (1 point)
A bomb calorimeter can be used to measure the enthalpy of reaction for combustions, such as the combustion of diborane represented by the
following balanced equation:
B₂H(g) + 30₂(g) →→→→ B₂O3(s) + 3H₂O(g)
-
AHcombustion for this process is -1958 kJ/mol.
V
1st attempt
Assume that 0.541 g of diborane is combusted in a calorimeter whose heat capacity (Ccalorimeter) is 7.854 kJ/°C at 22.61°C. What is the
final temperature of the calorimeter?
°C
4
12 OF 17 QUESTIONS COMPLETED
Jil See Periodic Table See Hint
< 17/17 >
SUBMIT ANSWER
Section 1: Correctly name as many compounds and ions as you can: 1. Ba2+ 2. I- 3. Ti 2+ 4. Rn 5. Ba Cl2 6. CO2 7. SO42- 8. SO4 9. (NH4)2 S 10. KClO3 11. Ca CO3 12. Ga(CN)3 13. S2O4 14. C3F6 15. K2 SO3 16. Sn3(PO4)2
Naming of compounds and ions are listed below:
1. Ba²⁺ : Barium cation
2. I³⁻ : Triiodide ion
3. Ti²⁺ : Titanium cation
4. Rn : Radon
5. Ba: Barium
6. Cl₂ : Chlorine
7. SO₄²⁻ : Sulphate ion
8. SO₄ : Sulphate ion
9. (NH₄)₂S : Ammonium sulphate
10. KClO₃ : Potassium chlorate
11. CaCO₃ : Calcium carbonate
12. Ga(CN)₃ : Gallium(III) Cyanide
13. S₂O₄ : Dithionite
14. C₃F₆ : Hexafluorocyclopropane
15. K₂SO₃ : Potassium sulfite
16. Sn₃(PO₄)₂ : Tin(II) phosphate.
Is every compound an ion?All substances are either molecular or ionic. A molecular compound is made up of molecules whose chemical composition reflects the amount of atoms that are really bound together in the molecule. The bond lengths and angles between the atoms' bonds together give the compound a distinct form.
Ionic bonds are the result of strong electrostatic interaction between nearby cations and anions. Sodium chloride, also known as table salt or NaCl, is the most typical kind of ionic substance. Ionic compounds do not have molecules, in contrast to covalent compounds.
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Which parts of Cell Theory did the scientists Matthais Schleiden and Theodor Schwann help to establish?
Answer: Matthias Schleiden helped to establish Cell theory that concluded all plant tissues are made of cells and embryonic plant arose from a single cell. Whereas Theodor Schwann told that both animals are made up of cells and these cells have independent lives.
Explanation:
In 1838, Matthias Schleiden, a German botanist, concluded that all plant tissues are composed of cells and that an embryonic plant arose from a single cell. He declared that the cell is the basic building block of all plant matter. This statement of Schleiden was the first generalizations concerning cells.
This statement of Schleiden was the first generalizations concerning cells. Schleiden investigated plants microscopically and conceived that plants were made up of recognizable units, or cells. He thought plant growth came about through the production of new cells, which, he speculated, came from the nuclei of old cells. Although later discoveries proved him wrong about the role of the nucleus in mitosis, his conception of the cell as the common structural unit of plants shifted study from to processes going on in a living cell.
Schwann concluded three things that became vital components of the cell theory. First, Schwann concluded that both plants and animals were composed of cells. Second, these cells have independent lives. Third, these independent lives are subject to the organism's life.
The cell is the basic unit of life. This statement was the second generalization concerning cells and is the most important in the development of biology.
It became known as the cell theory.
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Use your calculator to solve. Write your answer in scientific notation with the correct number of significant figures.
4.6 x105 mi
5.2 x10-2 yr
= _______________mi/yr
By the use of the scientific notation, the results in miles per year is 8.8 * 10^6 mi/yr.
What is the scientific notation?We know that the scientific notation has to do with the expression of a number in such a way that the umber would take up the least space. In this case we have to recall that we need to use the exponents to reduce the bulk of the figures that we would have needed to write.
Given that we have been asked to express the result or the quotient in the unit of miles per year while we take cognizance of the significant figures, we can write;
4.6 x10^5 mi/5.2 x10^-2 yr
= 8.8 * 10^6 mi/yr
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What to do to make a chemical change to water?
Answer:
Don't make a bomb hahaha, anyway here's your guide
Explanation:
There are several ways to make a chemical change to water, which is a molecule made up of two hydrogen atoms and one oxygen atom (H2O). Some examples of chemical changes that can be made to water include:
Electrolysis: Applying an electric current to water can cause it to decompose into hydrogen and oxygen gases.Acid-base reactions: Adding an acid to water can cause it to release hydrogen ions (H+), while adding a base can cause it to release hydroxide ions (OH-). This can cause the pH of the water to change.Oxidation-reduction reactions: Adding an oxidizing agent to water can cause it to gain oxygen atoms, while adding a reducing agent can cause it to lose oxygen atoms.Addition of a catalyst: Adding a catalyst to water can cause it to react with other substances more quickly.Formation of a complex compound: Water can react with other substances to form complex compounds, such as hydrated salts or hydrates.It's important to note that these chemical changes to water involve the formation of new chemical compounds, which is a hallmark of a chemical change. Physical changes, on the other hand, do not involve the formation of new compounds, but rather a change in the physical properties of a substance, such as its size, shape, or state of matter.
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Holt Chemistry Textbook Pg. 014: #01-03
1. Convert each of the following masses to the units requested.
a. 0.765 g to kilograms
b. 1.34 g to milligrams
c. 34.2 mg to grams
d. 23 745 kg to milligrams (Hint: Use two conversion factors.)
2. Convert each of the following lengths to the units requested.
a. 17.3 m to centimeters
b. 2.56 m to kilometers
c. 567 dm to meters
d. 5.13 m to millimeters
3. Which of the following lengths is the shortest, and which is the longest:
1583 cm, 0.0128 km, 17 931 mm, and 14 m?
The given unit conversions for the mass and length are as follows:
a. 0.765 g = 0.000765 kg
b. 1.34 g = 1340
c. 34.2 mg = 0.0342 g
d. 23 745 kg = 2.3745 * 10⁹ mg
2. a. 17.3 m = 17300 cm
b. 2.56 m = 0.00256 km
c. 567 dm = 56.7 m
d. 5.13 m = 5130 m
3. The shortest length is 0.0128 km and the longest length is 1583 cm
What is the mass of an object?The mass of an object is the amount of matter present in the substance.
The mass of objects is measured using a chemical balance, the unit of measurement is kilograms.
The various units can be interconverted.
To convert each of the following masses to the units requested, the conversion factor is used;
a. 0.765 g to kilograms
0.765 g = 0.765/ 1000
0.765 g = 0.000765 kg
b. 1.34 g to milligrams
1.34 g = 1.34 * 1000
1.34 g = 1340
c. 34.2 mg to grams
34.2 mg = 34.2 / 1000
34.2 mg = 0.0342 g
d. 23 745 kg to milligrams
23 745 kg = 23 745 * 10⁶
23 745 kg = 2.3745 * 10⁹ mg
2. To convert each of the following lengths to the units requested, the steps are as follows:
a. 17.3 m to centimeters
17.3 * 100 cm
17.3 m = 17300 cm
b. 2.56 m to kilometers
2.56 m = 2.56/ 1000
2.56 m = 0.00256 km
c. 567 dm to meters
567 dm = 567 / 10
567 dm = 56.7 m
d. 5.13 m to millimeters
5.13 m = 5.13 * 1000
5.13 m = 5130 m
3. Converting the following lengths to meters:
1583 cm = 15.83 m
0.0128 km = 12.8 m
17 931 mm = 17.931 m
14 m
The shortest length is 0.0128 km and the longest length is 1583 cm
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consider the following element combinations. classify the bonds formed between each pair as ionic, polar covalent, or nonpolar covalent qualitatively based solely on each element's position on the periodic table. do not conduct calculations.
Using the elements' positions on the periodic table is a general tool to predict probable bond type. The exact prediction of bond type can be made using electronegativity values.
Is s and F ionic or covalent?The bond between S and F is polar covalent. The electronegativity of S is 2.58 while the electronegativity of F is 3.98. The electronegativity difference between the two atoms is 1.40. When the electronegativity difference is between 0.5 to 1.6, we can say that, the bond formed between the two atoms as polar covalent.
Which of the following elements would form a non polar covalent bond?Cl and Cl. A non-polar covalent bond , where the two atoms sharing electrons have very similar electronegativities so that the electrons are equally shared.
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intiallt the ph of the solution as the strong acid is added to the solution of the weak base
pH of the solution decreases as the strong acid is added to the solution of the weak base
When a strong acid is added to the solution having a weak base, the pH of the solution decreases and as a result a conjugate acid is formed. This process is known as titration.
The addition of strong acid to a weak base is known as weak base-strong acid titration.
After the formation of conjugate acid, it reacts with water molecules and forms hydronium ions. These hydronium ions dissociate into H+ and OH- ions that decrease the pH of the solution.
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Which of the following best explains the entropy of an isolated system as it is taken through an irreversible thermodynamic process?
The entropy increases because the system becomes more disorderly.
What is thermodynamic process?
A system goes through several quasi-static states to reach a final state f, which is represented by a pressure , a volume , and a temperature , starting from an initial state that is described by a pressure pi, a volume , and a temperature . Energy can be transported from or into the system during this process, either by the system itself or on it. Increasing gas pressure while keeping temperature constant is an illustration of a thermodynamic process. Examples of thermodynamic processes are discussed in detail in the section that follows since they are crucial to the design of heat engines.Hence, The entropy increases because the system becomes more disorderly.
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The picture shows a bicyclist increasing speed while riding down a hill during a bicycle race.
Which statement BEST describes the potential and kinetic energy of this bicyclist?
The best way to sum up the cyclist's potential and kinetic energy is to say that as she progresses up the hill, her kinetic energy rises and her potential energy falls.
What is potential and kinetic energy?The object or system is unaffected by external factors like air pressure or altitude. On the other hand, kinetic energy refers to the force of moving particles within a system or an object.
Kinetic energy is the energy a thing has as a result of motion. A force must be applied to an object in order to accelerate it.We have to work hard in order to apply a force. Once the work is finished, energy is transferred to the item, at which point it moves at a new, constant speed.
What is difference between potential and kinetic energy?Potential energy is the energy that an object or system has stored as a result of its placement or configuration. An object's kinetic energy is measured in relation to stationary and moving items in its immediate environment. Potential energy is independent of an object's surroundings.
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Step 1:2NO⇄(NO)2(fast)
Step 2:(NO)2+O2⇄2NO2(slow)
The elementary steps in a proposed mechanism for the reaction 2 NO(g)+O2(g)→2NO2(g) are represented by the equations above. Which of the following is the rate law for the overall reaction that is consistent with the proposed mechanism?
Rate=k[NO]2[O2] of the following is the rate law for the overall reaction that is consistent with the proposed mechanism.
What is an elementary step?A simple set of reactions known as elementary steps or elementary reactions illustrate the progression of a reaction now at molecular level. The series of simple steps that together make up a full chemical reaction is known as a reaction mechanism.
What is the slowest elementary step?A reaction that requires two or more basic stages is considered to be multistep or complex. An intermediary is a chemical creature that is created in one basic stage of either a reaction and eliminated in the following. In a reaction system, the step that moves the slowest is the rate-determining step.
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air oxidations of aldehydes is used commercially to produce the corresponding carboxylic acids in very good yields for most compounds
When carboxylic acids deprotonate, a sulfonic anion only with general formula R-COO- is produced. This anion may be used to create a number of beneficial salts, including soaps.
What purposes serve carboxylic acids?In the creation of polymers, bioplastics, coatings, adhesives, and medicinal medicines, carboxylic acids and their equivalents are employed. They can also be utilized as flavorings, food additives, solvents, and antimicrobials.
Is carboxylic acid bad for people?The screening evaluation resulted in the conclusion that none of four chemicals with in carboxylic acid group are hazardous to either the environment or human health at the present exposure levels.
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select all that apply which of the following options correctly describe the structure shown? select all that apply.
Please Help!
In the image below, there are eight samples of different ELEMENTS. Each sample
is exactly 1 mol. Why are the masses of each sample different? The mass of 1
mole of each unique sample is different because the
of the
individual
are different.
O volume, atoms
O masses, atoms
O volumes, molecules
O masses, molecules
There is variation in the masses of 1.0-mole samples of different substances.
Does each substance's one mole possess the same mass?To have enough of the particles for chemists to work with in the lab, a lot (6.02 1023) of them are needed. A mole of the any particle will not weigh or have the same mass as a mole of another particle, just as a dozen donuts, flowers, and eggs did not have the same mass or weight.
What causes a difference in molar mass?
Additionally, molar mass provides the mass of the a mole of a specific substance, which is the primary distinction between the two. Molecular weight, on the other hand, refers to a substance's molecule's mass. Although the terms "molar mass" and "molar mass units" are not the same
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1. Which has greater solubility: baking soda or table sugar? Why?
table sugar, because much more of it can be dissolved in water.
baking soda, because it makes a solvent bubble.
table sugar, because it makes a solvent sweet.
baking soda, because much more of it can be dissolved in water.
TRUE/FALSE. carbon-14 is constantly being produced in the upper atmosphere, and the amount is in equilibrium. as long as an organism is alive, it keeps its carbon isotopes in balance with the atmosphere, but at soon as it dies, it stops taking up new 14c, and so the geologic clock starts.
True. The amount of carbon-14 remains constant in equilibrium and is produced in the upper atmosphere.
Carbon-14 is a long-lived radioactive carbon isotope formed by the collision of neutrons and nitrogen atoms in the atmosphere when cosmic radiation occurs.
Organisms during their lifetime will absorb carbon-14, carbon-14 is a carbon that easily bonds with other atoms to help process reactions in the body. As in plants, carbon-14 acts as carbon dioxide, which is the raw material for photosynthesis. Carbon-14 is also decaying and the amount will be replaced when living things breathe and eat. The process of absorption of carbon-14 in living things will stop when these living things die, and the amount of carbon-14 in their bodies will decrease.
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82. Predict the ion formed by each element.
(a) F
(b) N
(c) Mg
(d) Na
Explanation:
F2+ Because it is a transition metal
N3- Because it is in group 5
Mg2+ Because it is in group 2
Na+ Because it is in group 1