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3 years ago

Which statement best describes what happens during a chemical change?

2 answers:

4 0

I think the best answer that will describe chemical change is the first option. During a chemical change, b<span>oth the identity and the properties of a substance change because new substances are being formed by a chemical reaction. An example is rusting of steel</span>

Andreyy893 years ago

3 0

Answer: Option (A) is the correct answer.

Explanation:

When there is a change in chemical bonding of atoms between one or more compounds then it results in the formation of new compounds. This is known as chemical change.

For example, $AgNO_{3}(aq) + NaCl(aq) \rightarrow AgCl(s) + NaNO_{3}(aq)$ is a chemical change as there occurs change in identity and properties of the reactants.

Chemical changes can cause change in color, evolution of bubbles, and formation of precipitate.

Thus, we can conclude that the statement both the identity and the properties of a substance change best describes what happens during a chemical change.

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A 2.500g sample of compound containing only Carbon and Hydrogen is found containing 2.002g of Carbon. Determine the empirical fo

Dima020 [189]

The empirical formula : CH₃

<h3>Further explanation</h3>

Given

2.5 g sample

2.002 g Carbon

Required

The empirical formula

Solution

Mass of Hydrogen :

= 2.5 - 2.002

= 0.498

Mol ratio C : H :

C : 2.002/12 = 0.167

H : 0.498/1 = 0.498

Divide by 0.167 :

C : H = 1 : 3

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2 years ago

PLEASE ANSWER QUICK I WILL MARK BRAINLIEST A spreadsheet is a _____. A. way to organize data on a computer B. place to list obse

Oxana [17]

Answer:

The answer is D part of your lab notebook used for writing vocabulary

Hope it helps!

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4 years ago

First, get about 20 mL of the quinine stock solution in a clean beaker to prepare 250 mL of about 2 ppm quinine in 0.05 M H2SO4.

iris [78.8K]

Answer:

Volume of acid, Va=250mL; Volume of quinine,Vb=20mL; Molarity of acid, Ma=0.05M.

Molar mass of acid= H2+S+O4= 2+32+(16X4)= 2+32+64=98g

Concentration of acid, Ca= Molar mass of acid/ Ma =98/0.05=1960g/mol

Explanation: To calculate concentration of quinine, Cb is as follow

Va*Ca=Vb*Cb

∴ Cb=Va*Ca/Vb =250*1960/20 =24500g/mol

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3 years ago

Which choice describes a population? A. all the gray squirrels that live in a forest B. a nonliving factor in an organism's envi

goldenfox [79]

I believe D. because all the organisms that live in a lake can be a bunch of living things that would be considered a population and not a species. I canceled out B. from the get go because, I don’t believe non living organisms can be in a population ?

Please get back to me if I’m right or wrong :)

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3 years ago

Describe the type of force which exists between particles in an Ideal gas. Explain why this type of force exists between the par

aksik [14]

The Intermolecular force is a type of force which exists between particles in an Ideal gas.

<h3>What type of force which exists between particles in an Ideal gas?</h3>

Intermolecular forces are considered weaker attractions that hold molecules in gas close together. This force of attraction is present between molecules or particles.

So we can conclude that the Intermolecular force is a type of force which exists between particles in an Ideal gas.

Learn more about attraction here: brainly.com/question/1308963

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2 years ago