2 years ago

A hot air ballon rises because?

Chemistry

1 answer:

Mamont248 [21]2 years ago

5 0

Answer:

Explanation:

a. molecules become lighter when heated

You might be interested in

How did Mendeleev set up his Periodic Table of Elements?

Ksju [112]

He set up his periodic table by the atomic mass

8 0

2 years ago

What is the final, balanced equation that is formed by combining these two half reactions?

lara31 [8.8K]

Answer: Balanced equation that is formed by combining these two half reactions is $Cu + NO^{-}_{3} + 2H^{+} \rightarrow Cu^{2+} + NO^{-}_{2} + H_{2}O$ .

Explanation:

A chemical equation which contains same number of atoms on both reactant and product side is called a balanced chemical equation.

For example, $Cu \rightarrow Cu^{2+} + 2e^{-}$

$NO^{-}_{3} + 2e^{-} + 2H^{+} \rightarrow NO^{-}_{2} + H_{2}O$

On cancelling the common species from both these half-reactions, the complete balanced equation will be as follows.

$Cu + NO^{-}_{3} + 2H^{+} \rightarrow Cu^{2+} + NO^{-}_{2} + H_{2}O$

Thus, we can conclude that balanced equation that is formed by combining these two half reactions is $Cu + NO^{-}_{3} + 2H^{+} \rightarrow Cu^{2+} + NO^{-}_{2} + H_{2}O$ .

7 0

3 years ago

A student is building an electrical circuit. Which material should she choose for wires, and why.

r-ruslan [8.4K]

D. A metal such as copper, because its atom have very mobile electrons - A-p-e-x verified!

<u>Have a Great Day!</u>

3 0

3 years ago

(20 Points) Which definition of "coarse" matches its use in the phrase "coarse focus?"

vlada-n [284]

Answer by YourHope:

Hi! :)

Which definition of "coarse" matches its use in the phrase "coarse focus?"

A) "rough in texture"

Have a BEAUTIFUL day~

7 0

3 years ago

Read 2 more answers

Which of the following represents a phase change? A. Melting B. Crushing C. Expanding D. Burning

Fantom [35]

Melting is an example of phase change

6 0

3 years ago