Please answer, please answer please answer please answer
my last 2 chemistry question.
Answers
Answer:
1. filtration and evaporation
2. i) water is added to the sand and salt mixture
ii) then the mixture is filtrated and so the sand and the salt water was seperated
iii) the salt water is heated with the help of burner until the water gets evaporated
iv) after the water gets evaporated, the salt is remained in the container
3. observation:
on adding water to the mixture, the salt is completely dissolved in the waterwhen filtrated the sand is seperated from the salt waternow the salt water when heated with the burner until the evaporation, the water is evaporatedthe salt is precipitated and remained in the container4. cautions:
while using the burner, we should be cautious with firethe container that is heated should be holded with the help of a cloth to avoid heatRelated Questions
when solid has a mass of 15.0 g and volume of 12.4 mL, what is the density?
Answers
The actual decimal was 1.0967742
For each pair of covalently bonded atoms, choose the one expected to have the shortest bond length.(A) C-C(B) C?C...... (A,B)(C) C?O(D) C-O...... (C,D)bondlengthtitle.gif The length of a covalent bond depends upon the size of the atoms and the bond order.For each pair of covalently bonded atoms, choose the one expected to have the shortest bond length.(A) P-Cl(B) Si-Cl...... (A,B)(C) P-I(D) H-I...... (C,D)bondlengthtitle.gif The length of a covalent bond depends upon the size of the atoms and the bond order.For each pair of covalently bonded atoms, choose the one expected to have the shortest bond length.(A) Cl-I(B) I-I...... (A,B)(C) P-Br(D) P-Cl...... (C,D)
Answers
Answer:
See explanation
Explanation:
In the section A,B
C triple bond O has a higher bond energy. A triple bond is shorter and more difficult to break hence they have a higher bond energy.
For the same reason in the C,D section; C triple bond N has a higher bond energy.
In the next section, the higher the bond order the shorter the bond. Hence C triple bond C is the shortest in the A,B section while C triple bond O is the shortest in the C,D section. Both have a bond order of 3.
In the A,B section; I is larger than Br hence H-Br has the shortest bond length.
In the C,D section; Br is larger than Cl hence P-Cl has the shortest bond length.
Which of the sets of elements are not in order of increasing force of attraction on the outermost electron in atoms of that element?
Ba < Sr < Ca
Al < P < Cl
F < Cl < Br
Mo < Pd < Sn
Answers
Answer:
The set of elements that are not arranged in the order of increasing ionization energy is Mo < Pd < Sn
Explanation:
The force of attraction on the outermost electron of an element can be described by the ionization energy of the element which decreases down a group and increases across a period
1) The given elements Ba, Sr, Ca, are group 2 elements arranged in the order from bottom up, which gives an increasing ionization energy, therefore;
Ba < Sr < Ca is arranged in increasing ionization energy, and therefore, increasing force of attraction of the outermost electron in atoms of the elements
Similarly, Al < P < Cl and Mo < Pd < Sn, are arranged in order of increasing ionization energy
However F < Cl < Br which are arranged from top down of elements in period 17 are arranged in the order of decreasing ionization energy, and therefore, decreasing force of attraction of the outermost electron in atoms of the elements.
The elements that are not arranged in their increasing force of attraction base on the outermost electron present in their atoms is D:
Mo < Pd < Sn.
Ionization energy of an element usually increase when moving along the period and decreases down a group and thus explains the force of attraction on the outermost electron.Option A are arranged in from down to up of group 2, which means they are in increasing order of ionization energy, same thing with option B, C. But option D, doesn't follow the arrangements hence, the correct answer.Therefore , option D is correct.
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HURRYYY!!!!
How many moles of salt do you have, if you have 5.00 x 10^26 formula units of salt?
Answers
Answer:
830.56 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L}\\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{5.00 \times {10}^{26} }{6.02 \times {10}^{23} } \\ = 830.5647..[/tex]
We have the final answer as
830.56 molesHope this helps you
Diamond cannot conduct electricity but graphite can,why
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Diamond does not conduct electricity because it has no delocalized electron to conduct electricity.
Please help me! I would appreciate it if you can!
Answers
Answer:
meteorologist, barometers, anemometer, thermometer, balloon, satellites, station models, isotherms, isobars
Explanation:
Salt water is made of water (H2O) and NaCl (salt). Which of these substances is the solute
Answers
Answer:
[tex]NaCl[/tex] (salt) is the solute
Water [tex]H_20[/tex] is the solvent
Explanation:
A solute is the substance to be dissolved in a solvent to make a solution.
Calculate the density of a metal that has a mass of 100 grams and a volume of 350. mL.
Answers
Answer:
0.28571428571
Explanation:
m/v = density
PLEASE HELP!!
What elements typically bond with Zinc? include a formula or name.
Answers
Cadmium (Cd), Mercury (Hg), and Copernicium (Cn).
Write the Electron Configuration of an atom with 12 electrons:
Answers
Answer:
2,8,2
Explanation:
magnesium has 12 electrons
An element that is malleable and a good conductor of heat and electricity could have an atomic number of
Answers
Answer:
Copper (atomic number 29)
Explanation:
Copper is a element that is malleable and a good conductor of heat and electricity.
ASAP PLEASE
if you begin with the reaction of 300 grams of reactants how many grams of product should exist after the reaction explain
Answers
Answer:
If you begin a reaction with 300 grams of reactants, how many grams of products should exist after the reaction?
Explanation:
Propanoic acid fromula
Answers
Answer:
C₃H₆O₂
Explanation:
Propionic acid is a colorless liquid with a sharp rancid odor. Produces irritating vapor. (USCG, 1999)
Write with example of any three changes in the state of matter in daily life
Answers
Answer:
just wait 3 minutes ill tell you the answer cause its in my book
Explanation:
What determines the number of hydrogens in an acid?
Answers
Answer:
It's the same as the charge of the anion
Explanation:
What determines the number of hydrogens in an acid is the charge of the corresponding anion. This is otherwise termed the Basicity of the acid
According to the question;
We are required to identify what determines the number of hydrogens in an acid.An acid is typically made up of an Hydrogen ion(Cation) and another anion.
For instance:
HCl is made up of 1 H+ ion and 1 Cl- ion.While, H2SO4 is made up of 2 H+ and one SO4²- ion.Read more:
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Match the terms to their definition.
1. aerobic
any chemical compound that contains carbon
2. amino acid
dependent upon oxygen to function
3. organic
the basic building block of proteins
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Answer:
2
Explanation:
amino acid- the basic building block of proteins
organic- any chemical complains that contains carbon
what event typically causes upwelling?
Answers
Answer:
Conditions are optimal for upwelling along the coast when winds blow along the shore. Winds blowing across the ocean surface push water away. Water then rises up from beneath the surface to replace the water that was pushed away. This process is known as “upwelling.”
Explanation:
What is a feed back loop?
Answers
Answer:A feedback loop is a process in which the outputs of a system are circled back and used as inputs. In business, this refers to the process of using customer or employee feedback (the outputs of a service or product), to create a better product or workplace
Explanation: Becuz ur mom
The process by which CO2 gas releases heat energy to become dry ice is called :
evaporation
freezing
deposition
sublimation
Answers
i believe its deposition
According to the kinetic theory of gases and Gay Lussac's Law, which of the following statements is incorrect?
A. The pressure of a gas results from collisions between the gas particles and the walls of the
container.
B. The average kinetic energy of the particles in a gas is inversely proportional to the
temperature of the gas.
C. Collisions between gas particles in the container are inelastic, but particle collisions with the
walls of the container are elastic.
D. During perfectly elastic collisions, no energy is lost due to friction.
E. As heat is added to a gas, the number of particle collisions increases and the pressure decreases.
Answers
Answer:B C E
Explanation:
Answer:
BCE
Explanation:
I got it right
Hope it helps
A student found the mass of an object to be 5.5 g. The actual mass of the object is 5.3 g. What is the percent error in the measurement?
Answers
Answer: 3.6%
5.5 - 5.3 and divide it by 5.5. Then multiply this by 100
Explanation:
This will get you 3.6%
The percent error in the measurement is 3.774%
How do you calculate the percent error?
Subtract one cost from the other: 2.sixty eight - 2.70 = -zero.02.relying on what you need, you may discard any poor sign (take the absolute value): 0.02. that is the mistake.Divide the mistake by using the proper cost:zero.02/2.70 = zero.0074074.Multiply this fee by 100% to attain the percentage of mistakes:What's an example of a percent error?
For an instance, let's assume you guessed that there have been 230 gumballs within the picture, however, there were simply 311 gumballs. The distinction between your wager (230) and the actual wide variety (311) in the evaluation of the actual variety (311) expressed as a percentage is the percentage error.
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true or false
the mass of an object changes when it goes through a physical or chemical change
Answers
Answer:
True.
But it only changes in physical change.
How?
Explanation:
The chemical reaction produces a new substance with new and different physical and chemical properties. Matter is never destroyed or created in chemical reactions. The particles of one substance are rearranged to form a new substance.
In a physical change, a substance's physical properties may change.
A chemical change is a permanent change. A Physical change affects only physical properties i.e. shape, size, etc. ... Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc.
Hope this helps!
Which is one source of the sediments that form sedimentary rocks?
Answers
Answer:
Sandstone, limestone, and shale
Explanation:
The rocks are most likely to start as sediments carried in rivers and end up in lakes and oceans
Answer:
D - materials dissolved in solutions
Explanation:
EDGE 2021
Urgent help plz!!!!!!!!!
Answers
Answer: .03 M
Explanation:
you have to use m1v1 = m2v2
but the units should be in L so we need to convert the 32.20 and 26.60 into L by dividing them by 1000. So now we have .0322 and .2660
.0322(.25)=(.2660)(x)
x = .03
Does hydrogen have a pH level? If so what is it?
Answers
Answer:
I think it has ph level of 7.0
In The Lord of the Rings, Frodo and Sam use a rope to rappel down a cliff. The rope was 30 ells long. How high was the cliff in meters if the rope reached the bottom?
Answers
Answer:
324 meters
Explanation:
I don't really have an explanation
A cylinder at left with balls evenly spaced throughout the cylinder with an arrow leading to a cylinder at right with balls stacked near the bottom of the cylinder.
Which change of state is shown in the model?
condensation
deposition
boiling
freezing
Answers
Answer:
deposition
Explanation:
The model above shows a transition from a gas state to a solid state. This is known as "deposition."
The particles are widely-spaced on the left because they have a lot of energy; thus, they don't interact with each other. This is the reason why the gas doesn't have a definite shape and volume.
The particles on the right are stacked near the bottom because they don't have enough energy to move about; thus they interact with each other. This gives solid a definite shape and a definite volume. They can only move if the thermal energy increases.
Answer:
its DEPOSITION edg 2020
Explanation:
i just need the last one
Answers
How does the atomic radius increase?
Answers
Answer:
increases as you move down a group as the number of electrons increases. Therefore, the atomic radius increases as the group and energy levels increase
Explanation:
How can you cause a physical change?
ill give 10 points
Answers
crushing a can
melting an ice cube
boiling water
mixing salt and water
breaking a glass
dissolving sugar and water
shredding paper
chopping wood