Chemistry High School

a. Law of conservation of matter
i. What does the law say about matter?

Answers

Answer 1
Can u help me plzzz this is my final exam am I need help asap
A. Law Of Conservation Of Matteri. What Does The Law Say About Matter?

Related Questions

How does the microscopic arrangement of particles affect the microscopic behavior of the solution?

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Answer:

In a solid, the particles pack together as tightly as possible in a neat and ordered arrangement. ... With an increase in temperature, the particles gain kinetic energy and vibrate faster and more strongly. The attractive force in solids need not be stronger than in liquids or gases

Can someone help me with this chemistry question please?

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C. Energy use

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What is mechanical energy?

The energy that is associated with the motion or position of an object
The energy that travels in waves from the moon
Any energy that travels through a medium like water
The stored energy in a substance like oil or gasoline

Answers

Answer:

The energy that is associated with the motion or position of an object

or simply kinetic or potential Energy

An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 2 ml. The height of the water rose to 7 ml. If the mass of the stone was 25 g, what was its density?

Answers

The density of an object is the amount of mass per unit volume. The idea of putting the stone into the water in a graduated cylinder is that this tells you the volume of the stone. Since the water raised increased from the 2 mL mark to the 7 mL mark after putting it in the cylinder, the volume of the stone must be equal to 5 mL of water. At room temperature, 1 mL of water has the same volume as 1 cubic centimeter (cm^3), so the stone also has a volume of 5 cm^3.

To get the density, divide the mass of the stone by its volume:

D = m/v = (25 g)/(5 cm^3) = 5 g/cm^3

The density of the stone is 5 grams per cubic centimeter.

Hope this helps!

what is the hybridization at each carbon atom in the molecule?

Answers

The carbon atoms are sp3 hybridized.

Hope this helps!

oncepts
4 List What are some of the physical properties
of stars?

Answers

Answer:

Brightness. Two characteristics define brightness: luminosity and magnitude. ...

Color. A star's color depends on its surface temperature. ...

Surface Temperature. ...

Size. ...

Mass.

Explanation:

there


3. A baseball bat striking a baseball and sending it toward left field is an example
of energy transformation. True or false. Please help it’s due tomorrow!!!

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Answer:

TRUE

Explanation:

. Identify molecules of elements;
O2, NH3, He

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Elements can be made of one atom, like He, or be elemental molecules, such as hydrogen (H2), oxygen (O2), chlorine (Cl2), ozone (O3), and sulfur (S8). Atoms are not drawn to scale. Some elements are monatomic, meaning they are made of a single (mon-) atom (-atomic) in their molecular form...

describe the motion and arrangement of particles in a solid, a liquid, and a gas.

Answers

Answer:

gas vibrate and move freely at high speeds. liquid vibrate, move about, and slide past each other. solid vibrate (jiggle) but generally do not move from place to place.

Hopefully this helped!

A chemical reaction is when substance are changed into other substances.

True or False

Answers

Answer:

True

Explanation:

coz it is when one or more substances are mixed to produce one substance

Answer:

true

Explanation:

when its asking for a chemical reaction its asking for if it changed or had any effects like changing color or having weird effects on things it is mixed with or touches so its true

An electron moved from a lower energy level to a higher energy level. What most likely happened during the transition? (4 points)

Group of answer choices

A random amount of light was released.

A fixed amount of energy was absorbed.

A fixed amount of energy was released.

A random amount of light was absorbed.

Answers

Answer:

A. A random amount of light was released

Explanation:

A random amount of light was released. Hence, option A is correct.

What are electrons?

An electron is a negatively charged subatomic particle. It can be either free (not attached to any atom) or bound to the nucleus of an atom. Electrons in atoms exist in spherical shells of various radii, representing energy levels. The charge on a single electron is considered the unit electrical charge.

Electrons are sub-atomic particles that occupy energy levels in an atom of any chemical element. These electrons may move from one energy level to another.

Electrons may move from a lower energy level or ground state to an excited state or high energy level, or else move from a higher energy level to a lower energy level.

When an electron moves from a lower energy level to a higher energy level energy is absorbed by the atom, and when the movement is from a higher energy level to lower energy is released mainly as light.

Hence, option A is correct.

Learn more about electrons here:

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Help this is so confusing like

Answers

Answer:    which of the following is qualitative?

A. 100-calorie apple

B. 1-liter soda

C. triangular crystal

D. 10-inch brick  

answer is D

Explanation:

what do you do if you add a bit too much solvent when filling the volumetric flask to the mark

Answers

If excess solvent is added, discard the entire solution and begin the process of preparing the solution afresh.

It is common to prepare solutions using a standard volumetric flask. In this method, the required amount of solid or liquid is added to the volumetric flask and made up to mark with solvent.

Sometimes, it is possible to mistakenly exceed the mark as the solvent is added. In such cases, you must discard the entire solution and begin the process of preparing the solution afresh.

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Calculate the molar mass of carbon tetrachloride, CCl4.

Answers

the answer is 153.82 g/mol

When a glucose molecule loses a hydrogen atom in an oxidation-reduction reaction, the glucose molecule is ________

Answers

Answer:

Important

Explanation:

"Solution is a homogeneous mixture" explain​

Answers

Answer:

solution is equal distribution of a solute and liquid

Explanation:

for example water and sugar make a solution

Solutions with a uniform composition are homogeneous solutions. A homogeneous solution, then, has an equal concentration of the constituent substances throughout the entire solution.

Similar to how water molecules are evenly distributed among the Na+ and Cl- ions when sodium chloride dissolves in it. The mixture's composition is constant throughout, and it is difficult to separate the components from one another. Solutions are homogeneous mixtures, which can contain substances in either state (solid, liquid, or gas).

Even if the components were evenly dispersed, they could still be separated at some point in a homogeneous mixture. The components may need to be separated using a procedure like evaporation, distillation, or chromatography, but this is still possible.

Learn more about Homogeneous solutions;

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What do the electron configurations of the elements Mo and Pt have in common?

Answers

Answer:

All of the elements in a period have the same number of atomic orbitals. For example, every element in the top row (the first period) has one orbital for its electrons. All of the elements in the second row (the second period) have two orbitals for their electrons.

Explanation:

Did you know that
1-7=0

Answers

Answer:

No I didn’t

Explanation:

I never knew that this helped me a lot thanks

How do the atoms aluminum and fluorine react to form the compound aluminum fluoride?

Answers

Answer:

Aluminum fluoride is an ionic compound. Meaning that the two elements form a ionic bond. In ionic bonding, atoms receive and donate electrons in order to become stable. In this case, aluminum donates its three outer electrons to three fluorine atoms. Aluminum forms a triple positive aluminium ion (Becomes a cation) and fluorine forms three single negative fluoride ions (Becomes a anion).

Aluminum (3+)Fluorine (1-)

AgNO3(aq) + NaCl (aq) —> AgCl (s) + NaNO3 (aq)

The equation represents a __ reaction.

A. synthesis
B. decomposition
C. neutralization
D. double replacement

Answers

Answer:

D

Explanation:

double replacement

the reactants decompose to form new substances by exchange of radicals

An Oxygen atom Isotope has an overall charge of -1. How many electrons does it have?

Answers

Answer:

8 electrons.

Explanation:

9. Which of Earth’s sphere consists of all living things? A. hydrosphere B. geosphere C. biosphere

Answers

Answer:

i think its b

Explanation:

i took it

Can someone help me with this chemistry question?

Answers

Answer:

B no. is the answer because

Explanation:

acids increase the hydrogen ion concentration, which provides more ionsan acid comes in contact with a metal, the acid steals free electrons away. That loosens the bonds holding metal atoms in place, so the metal dissolves. That's a chemical change, so the ability of acids to dissolve metals is a chemical propertyWhen a strong acid is neutralized by a strong base there are no excess hydrogen ions left in the solution. The solution is said to be neutral as it is neither acidic nor alkaline. The pH of such a solution is close to a value of 7; the exact pH value is dependent on the temperature of the solution.

So this can probably be the the answer

Hope my answer helps

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What is the value of c?
56.70

Answers

Due to the lack of information provided, the best I can give you is this:

In Chemistry, the letter c most commonly refers to specific heat, which is present in the ratio J/g°C.

Hope it helps :)

what is distillation used to seperate

Answers

Distillation is used to separate liquids from nonvolatile solids as in separation of alcoholic Liquors from fermented materials or in the separation of two or more liquids having different boiling points as in the separation of gasoline Carrison and lubricating oil from crude oil

Answer: It is used to separate a solvent from a solute.

Explanation:

what are colloids ? ​

Answers

A solution in which the size of solute particles is intermediate between those in true solution and suspension is called as Colloids.

Answer: A colloid is a mixture in which one substance consisting of microscopically dispersed insoluble particles is suspended throughout another substance.

Hope it helps , have a nice day :>

is a single cell the smallest structure that carries out our activities nesscesary for life

Answers

yep, the cell is the smallest unit in a living organism that is capable of carrying out all of the activities of life.

if 15 grams of carbon is present at the beginning of a reaction,how many grams of carbon will be present in the products?

Answers

The law of conservation states that the mass of the element remains the same during the course of the reaction.

The law of reaction conformed by the following:-

Mass of reactantMass of product

According to the question, the amount of carbon is 15g in the reactant and the amount will remain same at the end of reaction, which is product that is 15g.

Hence, the amount remain same in the reaction that is 15g.

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An atom, X, contains 16 protons.
Which statement about Z is correct?Explain why.
A) It cannot form an ion.
B) It contains 6 electrons in the outer shell.
C) It contains 6 neutrons.
D) It had relative atomic mass of 16.

Answers

Answer:

B

Explanation:   as protons no. = electrons no.= atomic number(Z)

Which of the following best describes the relationship between a
mutation and a resulting change in the coat color of a mouse?

Answers

Answer:

A I think

Explanation:

Other Questions
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