Given the name of an element and the number of neutrons, find the mass of an Isotope
Answers
The given element nitrogen have 7 electrons and 7 protons. Mass number is the sum of number of protons and neutron. The number of neutrons is 7. Thus mass number of the isotope is 14.
What is nitrogen?Nitrogen is 7th element in periodic table. It is an electronegative element and is included in p block. Nitrogen exists as gas but sometime it can be liquified under high pressure.
Isotopes are atoms with same atomic number and different mass number. Nitrogen have two isotopes. N-14 and N-15. Mass number is the sum of number of protons and neutrons.
Even though isotopes are different in mass number their chemical properties will be similar but there exists slight changes in their physical properties.
Here, we have 7 protons and 7 electrons therefore, the mass number 14.Thus the isotope given in the diagram is N-14.
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Related Questions
A gas has a pressure of 65.0 mmHg at 740K. What will be the pressure at 300K if the
volume does not change?
Answers
Answer:
26.35 mmHg
Explanation:
Given data:
Initial pressure = 65.0 mmHg
Initial temperature = 740 K
Final temperature = 300 K
Final pressure = ?
Solution:
According to Gay-Lussac Law,
The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.
Mathematical relationship:
P₁/T₁ = P₂/T₂
Now we will put the values in formula:
65 mmHg / 740 K = P₂/300 K
P₂ = 65 mmHg× 300 K / 740 K
P₂ = 19500 mmHg. K /740 K
P₂ = 26.35 mmHg
Use this diagram to answer the following
questions.
a
7 Identify Is this an atom or a molecule?
Explain your reasoning.
THIS IS ACTUALLY SCIENCE NOT CHEMISTRY
Answers
Answer:An atom
Explanation:
Because molecules more spread out and have things that connnect them and are not bunched up togoether
And Atoms are all packed up like in the picture
Hope this helps!:D
The diagram shown is that of a molecule as it is made up of two different kinds of atoms.
What is an atom?
An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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what layer of the Earth is made of liquid metal?
Answers
Answer:
the outer core
Answer:
The outer core
formal units are formed by?
Answers
Answer:
However, when formal units are used to measure length, the measurement can usually be read from a scale on a ruler or tape, which shows units of a particular size. Unit iteration involves knowledge of repeatedly placing identical tightly packing units so that there are no overlaps or gaps.
Explanation:
Calculate the mass of 0.100 mol of calcium
Answers
Answer:
4.01 g
Explanation:
A population of panthers lives in the southeastern United States. Over 50 years, the size of the panther population in the region increased. What best explains the increase in the size of the panther population?
Answers
Explanation:
Because the panthers live in the southeastern region of the United states they have increased in population in that region. They have been able to gain more food and have adapted more to there environments. Which allows to increase and reproduce more. That is why the Panthers in the southeastern United states have increased In population. I hope this works for you and that it helps. I don't mind helping someone who has a question! From, me.
A population of panthers lives in the southeastern United States. Over 50 years, the size of the panther population in the region increased. More panthers were born than died explains the increase in the size of the panther population.
What is the largest panther in the world?The jaguar, also known as the panther, tigre, or onza, is the world's largest and most powerful cat. Human activities endanger this cat, as they do the Florida panther (Puma concolor).
Because the anteater population will have fewer energy storage molecules available due to the smaller ant population, the anteater population will reproduce less.
Panthers can be found in the southeastern United States. The region's panther population has grown over the last 50 years. Because no animal eats panthers, the panther population is always growing.
Thus, More panthers were born than died explains the increase in the size of the panther population.
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water traveling in a circular motion when heating up a example of
A. Conduction
B. Convection
C. Radiation
D.none of these
Answers
Answer:
B.convection
Explanation:
Convection is the circular motion that happens when warmer air or liquid — which has faster-moving molecules, making it less dense — rises, while the cooler air or liquid drops down
identify the molar mass of na2(so4)3
Answers
Answer:
142.04 g/mol is the answer to your question.
What does “like dissolves like” mean?
a
solvents dissolve chemicals with the same color (ex. both are green)
b
solvents dissolve chemicals made by the same company (ex. both made by Dow)
c
solvents dissolve chemicals with the same polarity ( ex. both are polar)
d
solvents dissolve chemicals with the same size (ex. both are 3 inches)
Answers
Answer:
c solvents dissolve chemicals with the same polarity ( ex. both are polar)
Explanation:
Like dissolves like is one of the central rule that guides the solubility of one substance in another.
It fully suggests substance having the same nature as in polarity-wise will dissolve one another. For example, water is a polar liquid, it will dissolve table salt because it i also polar. Water cannot dissolve oil because oil is non-polar.Which structure is a valid representation of a hydrocarbon molecule?
Answers
Im pretty sure it is the first one
Question 1 of 10
Which describes the law of conservation of matter?
O A. The reactants must have more atoms than the products.
B. The reactants must have fewer atoms than the products.
C. Atoms change into other elements during a reaction.
D. The same atoms must be in the products and the reactants.
SUBMIT
FIRST PERSON GETS BRAINLIEST IF RIGHT
Answers
Answer:
I think is D. The same atoms must be in the products and the reactants.
Explanation:
Explanation:
DThe same atoms must be in the products and the reactants.
Which characteristic is related to kinetic energy but not potential energy
Answers
Answer:
kinectic is movement and potential is still
Explanation:
While kinetic energy of an object is relative to the state of other objects in its environment, potential energy is completely independent of its environment. Hence the acceleration of an object is not evident in the movement of one object, where other objects in the same environment are also in motion.
Answer:an object’s speed
Explanation:
What type of reaction is shown here?
SeCl6+O2 , SeO2 + 3Cl2
O Single replacement
O Combustion
O Double replacement
O Synthesis
O Decomposition
Answers
Answer:
Depends since Chemical equation is not written clearly...
Explanation:
if if the comma represents an equal sign then I would assume that this would be a single replacement... however if this is all one equation I would assume it is a double replacement.
The type of chemical reaction shown in the question is a: A. Single replacement.
A chemical reaction can be defined as a chemical process involving the continuous transformation (rearrangement) of either the ionic, atomic or molecular structure of a chemical element, especially through the breakdown and formation of chemical bonds, in order to produce a new chemical compound.
In Chemistry, there are five (5) main types of chemical reaction and these include;
Combination reaction.Combustion reaction.Double-replacement reaction.Decomposition reaction.Single-replacement reaction.A single-replacement reaction is also referred to as a single-displacement reaction and it can be defined as a type of chemical reaction wherein a single (one) chemical element of the reacting chemical compound is replaced (substituted) by a similar chemical element.
Basically, a single-replacement reaction typically involves a single element ([tex]O_2[/tex]) replacing another element ([tex]Cl_6[/tex]) within a chemical compound ([tex]SeCl_6[/tex]).
[tex]SeCl_6+O_2[/tex] ----> [tex]SeO_2 + 3Cl_2[/tex]
In conclusion, the above chemical reaction is a single-replacement reaction because oxygen gas replaces the chlorine molecules in selenium hexachloride.
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_______forces do not affect the movement of an object.
Answers
Balanced forces do not cause change, unbalanced ones do
What represents the identity of an element
Answers
Answer:
The identity of an element is its atomic number, which is the number of protons within the nucleus of one of its atoms.
Explanation:
2. The ions in an ionic compound separate from each other when
A. dissolved in water
B. when melted
C. when conducting electricity
D. never
Answers
Answer:
A. when dissolved in water
Explanation:
Water is an extremely polar molecule, meaning it has a positive end a negative end. When an ionic compound is dissolved, the positive pole of water will be attracted to the negative ion and attach itself to it. The same goes for the positive ions. That's how water breaks down ionic compounds
Answer:
ions do separate in an ionic compound because there is the free flow of electrons in the oppositely charged ions and conducts electricity in an aqueous form
What is the importance of activity series?
Answers
The activity series of metals is an empirical tool used to predict products in displacement reactions and reactivity of metals with water and acids in replacement reactions and ore extraction. It can be used to predict the products in similar reactions involving a different metal.
The molecule
found in paper is almost identical to the
carbohydrate molecule found in mashed
potatoes.
glycogen
chitin
cellulose
Answers
Answer:cellulose
Explanation:
I just did it.
who ran the control room chernobyl part 1
Answers
When 50.0 mL of 1.000 M HCl is reacted with 50.0 mL of 1.000 M NH4OH, the solution's temperature increases 8.65 °C. Calculate qsolution in units of kJ. The specific heat of the salt solution is 4.184 J/g-°C and the density is 1.010 g/mL.
Answers
Answer:
Explanation:
Total volume of solution = 100 mL .
Total mass of the solution = 100 x 1.01 g
= 101 g
specific heat of solution = 4.184 J/g-°C
rise in temperature = 8.65 °C
heat released = mass x specific heat x rise in temperature
= 101 x 4.184 x 8.65
= 3655.35 J
= 3.655 kJ .
qsolution = 3.655 kJ .
Which of the following represents the chemical reaction of benzene and nitric acid to produce nitrobenzene and water?
Answers
Answer:
D
Explanation:
i mean it's just taking the words of the question and putting them into an equation
[tex]\huge\boxed{Option C}[/tex]
_____________________________________Equation:Benzene + Nitric Acid ---------> Nitrobenzene + water_____________________________________Explanation:As per Question,
It is saying that Benzene(organic compound) reacts with nitric acid. So,
Benzene and Nitric Acid are Reactants,
Nitrobenzene is the Product.
_________________________________________________________
General way of showing the reaction is,
Reactants --------> ProductIn the following Question,
Benzene is Reactant no. 1,
Nitric Acid is Reactant no.2,
Nitrobenzene is Product no 1,
Water is a By Product.
_____________________________________Best Regards,'Borz'4. Hot material in the Earth's mantle rises and cool material
sinks. This is an example of
a. conduction
b. convection
c. radiation
d. none of these
Answers
Answer:
Th answer is b. convection.
Explanation:
As the heat rises it cools down and it sinks and as the cold sinks it heats up so then it rises back up.
what is hard water and what causes hardness of water
Answers
Answer:
hard water is ice
Explanation:
ice is formed as the water temperature decreases and then it freezes
Will mark brainliest for who is right
Which properties change the composition of a substance?
chemical and physical properties
neither chemical nor physical properties
physical properties
chemical properties
Answers
pb3(po4)2 compound name
Answers
Answer:
Lead phosphate
Explanation:
Pb3(po4)2 has the compounded name of lead(II) phosphate.
What is lead(II) phosphate like ?It is a white, crystalline solid that is insoluble in water. Lead(II) phosphate is used in some paints and plastics, and it is also used as a pigment.
The name of the compound is based on the oxidation state of the lead atom. Lead can have two oxidation states, +2 and +4. In Pb3(PO4)2, the lead atom has an oxidation state of +2, so the compound is named lead(II) phosphate.
The phosphate ion has an oxidation state of -3, so there are two phosphate ions in the compound to balance the +6 charge of the three lead atoms.
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Which organic molecule is not considered a polymer? *
1 point
O nucleic acids
carbohydrates
O lipids
O proteins
Answers
Answer:
Lipids
Explanation: Lipids are, in fact, the only non-polymer organic molecules.
What happens to the energy release of an exothermic reaction?
1.It increases the bond energy of the reactants.
2.It is released to the surroundings.
3.It raises the temperature of the reactants.
Answers
Answer:
2.It is released to the surroundings.
Explanation:
In an exothermic reaction, the energy released is to the environment. At the end of the reaction, the surrounding becomes hotter than the system where the reaction is taking place.
Heat is liberated to the surrounding in an exothermic change. At the end of this change, the surrounding becomes hotter. Examples are combustion, dissolution of substances, etc.When a piece of sodium metal is kept in water in chemical equation
Answers
Explanation:
Sodium metal reacts rapidly with water to form a colourless basic solution of sodium hydroxide (NaOH) and hydrogen gas (H2). The reaction continues even when the solution becomes basic. The resulting solution is basic because of the dissolved hydroxide.
Explanation:
Sodium metal reacts rapidly with water to form a colourless basic solution of sodium hydroxide (NaOH) and hydrogen gas (H2).
Which part of project management involves determining possible risks?
Answers
Answer:
Resources
Explanation:
Answer:
Explanation:
M
5. What do the data in your graphs tell you? Explain in one or two sentences what trend the reader should observe in each of your graphs. (Science Lab Report, if you don't know what the answer is please don't answer-)
Answers
Answer:
Graphs are a common method to visually illustrate relationships in the data. The purpose of a graph is to present data that are too numerous or complicated to be described, and If the data shows pronounced trends or reveals relations between variables, a graph should be used.
Explanation:
literally bro i had the same answer for my actual project for edge
Answer: Graphs are a common method to visually illustrate relationships in the data. The purpose of a graph is to present data that are too numerous or complicated to be described, and If the data shows pronounced trends or reveals relations between variables, a graph should be used.
Explanation: