When coal burns, the reaction

Chemistry

1 answer:

katovenus [111]1 year ago

4 0

Answer is B. Releases heat and is exothermic

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You can prepare a buffer solution by combining equal moles of which pair of substances?

zzz [600]

Answer:

A. weak acid and its conjugate base

Explanation:

A buffer solution can be made with a weak acid and conjugate base or a weak base and conjugate acid.

This may help you:

https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_and_Theoretical_Chemistry)/Acids_and_Bases/Buffers/Introduction_to_Buffers

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2 years ago

Prisms separate ________ light, such as that from the Sun, by wavelength. Which best completes the statement? ultraviolet white

tatuchka [14]

Answer:

The answer is B white

Explanation:

hope it helps :)

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2 years ago

Write balanced molecular equation for the reaction between nitric acid and calcium hydroxide. Express your answer as a chemical

eimsori [14]

<u>Answer:</u> The balanced chemical equation for the reaction of nitric acid and calcium hydroxide is written below.

<u>Explanation:</u>

A balanced chemical equation is defined as the equation in which total number of individual atoms on the reactant side is equal to the total number of individual atoms on product side.

The balanced chemical equation for the reaction of nitric acid and calcium hydroxide follows:

$2HNO_3(aq.)+Ca(OH)_2(aq.)\rightarrow Ca(NO_3)_2(aq.)+2H_2O(l)$

By Stoichiometry of the reaction:

2 moles of nitric acid reacts with 1 mole of calcium hydroxide to produce 1 mole of calcium nitrate and 2 moles of water molecule.

Hence, the balanced chemical equation for the reaction of nitric acid and calcium hydroxide is written below.

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3 years ago

Crystals of a chemical in a lab slowly disappear from their container they do not become liquid. What change of state is this an

Olenka [21]

The change of state that has been given in the question is called sublimation. It is actually the process in which a solid gets directly converted to gas without changing into liquid. I hope that this is the answer that you were looking for and the answer has actually come to your desired help.

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3 years ago

20. A compound's empirical formula is C,H,O. If the molecular mass of the compound is

kozerog [31]

Answer:

Just use a text book.. So that you get the concept

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2 years ago