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3 years ago

A 0.0200 M NaCl solution was formed when 38.0 grams of NaCl was dissolved in

1 answer:

4 0

Answer: The volume of the solution formed will be 32.5 L. Explanation: Molarity is defined as the amount of solute present in 1 L of solution. The equation used to determine molarity of the solution follows: We are given: Molarity of the solution = 0.02 mol/L Mass of NaCl = 38 grams Molar mass of NaCl = 58.5 g/mol Putting values in above equation, we get: Hence, the volume of the solution formed will be 32.5 L.

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Which statement describes the condition in which diamonds form?

eduard

I think it's A but it might be different from your school and mine

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3 years ago

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7. Which of the following is a chemical property?

Goryan [66]

Answer:

It ability to react with oxygen.

Explanation:

Freezing point and hardness can be altered. Physical properties can also be reversed. Chemical properties on the other hand cannot. The product after reaction with an element never changes.

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3 years ago

What molality of a nonvolatile, nonelectrolyte solute is needed to raise the boiling point of water by 7.10°c (kb = 0.520°c/m)?

faltersainse [42]

According to boiling point elevation equation:
Δ T = i Kb m
when ΔT (change in boiling point) = 7.10 C°
and i (van't Hoff factor)= 1
and Kb = 0.520
so, by substitution:
7.10 = 1*0.520 *m
m = 7.1 / 0.52 = 13.65 m

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3 years ago

Select the PREDICATE ADJECTIVE(S) (if one or more is present).

creativ13 [48]

Answer: There is no predicate adjective in the sentence.

Explanation:

Predicate adjective is defined as an adjective that follows the linking verb and modifies the subject of the linking verb.

For Example:

The shoes look expensive.

In this sentence, the shoes are the subject, 'look' is the linking verb and 'expensive' is the predicate adjective.

The predicate adjective modified the subject.

In the given sentence,

'Five' is a common noun, 'cookies' is the subject, 'are' is the helping verb, 'on' is the preposition, 'the' is an article and 'table' is a countable noun.

Hence, there is no linking verb and therefore, this sentence has no predicate adjective.

8 0

3 years ago

1) Students set up the apparatus you see here to separate water into its two components: hydrogen and oxygen. The illustration a

zvonat [6]

Answer:

1) D; 2) B

Explanation:

1) Conservation of atoms

D is correct.

It has four atoms of H and two of O on each side of the reaction arrow.

A. Wrong. It has the same number of H and O on each side, but it has the wrong product. The reaction forms O₂ molecules, not O atoms.

B. Wrong. Atoms are balanced, but the products are incorrect.

C. Wrong. Atoms are balanced, but the reactants are incorrect.

===============

2) Chemical equations

B is correct.

The atoms are balanced, and the equation shows the correct formulas of the molecules.

A. Wrong. Atoms are balanced, and the formulas are correct, but the equation is not in its simplest form. The coefficients are not in their lowest terms. We must divide every coefficient by six to get the correct equation: H₂ + Cl₂ ⟶ 2HCl.

C. Wrong. The reactants are incorrect, and the equation is not in its lowest terms.

D. Wrong. The reactants are incorrect.

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3 years ago