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2 years ago

What happens when light enters water?

Chemistry

2 answers:

Lilit [14]2 years ago

8 0

Answer:

It slow down

It slow down when it passes from the less dense air into the denser glass or water

TiliK225 [7]2 years ago

5 0

D. It slows down
It slows down because the water keeps its from sinking

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Hydrazine (N2H4), a rocket fuel , reacts with oxygen to form nitrogen gas and water vapor. The reaction is represented with the

Serggg [28]

85.33 grams of hydrazine is needed for the reaction.

Rocket fuel contains the reaction between hydrazine and oxygen to break and form nitrogen and water vapour along with steam as it is an exothermic reaction.

<h3>How to calculate the hydrazine amount?</h3>

The reaction can be shown as:

$\rm N_{2}H_{4}(l) + O_{2}(g) \rightarrow N_{2}(g) + 2H_{2}O(g)$

From the periodic chart, it can be said that:

Mass of nitrogen = 14 gm
Mass of oxygen = 16 gm
Mass of hydrogen = 1 gm

The molar mass of hydrazine will be:

$\begin{aligned} \rm Molar \;mass \;of \rm \;N_{2}H_{4}&= 2(14) + 4(1) \\\\&= 32 \;\rm grams\end{aligned}$

Mass of water:

$\begin{aligned}&= 2(1) + 16 \\\\&= 18 \;\rm grams\end{aligned}$

From the reaction, it can be said that,

1 mole of $\rm N_{2}H_{4}$ = 2 moles of $\rm H_{2}O$

32 grams of $\rm N_{2}H_{4}$ = ? grams of water

$\begin{aligned}\text{Gram of water} &= 18 \times 2\\\\&= 36 \;\rm gm\end{aligned}$

So, for 96 gm of water the hydrazine produced will be,

$\begin{aligned}\text{mass of }\rm N_{2}H_{4} &= \dfrac{96 \times 32}{36}\\\\&= 85.3334 \;\rm grams \end{aligned}$

Therefore, 85.33 grams of hydrazine is needed for the reaction.

Learn more about rocket fuel here:

brainly.com/question/10179270

7 0

2 years ago

What is the percent composition by mass of chlorine in LiCI

Lelechka [254]

Answer: Lithium (Li) 16.373%

Chlorine (Cl) 83.627%

Explanation:

6 0

3 years ago

HELP PLEASE ILL DO ANTHINF

Sergeu [11.5K]

Answer:

memory cells

Explanation:

The unscrambled words are white blood cells, memory cells, and antibodies. Memory cells is the correct answer, so that's what you'd write.

4 0

4 years ago

13. Gas A and gas B (both unreactive) are allowed to mix. The total pressure is found to be 3.50 atm. f gas B

murzikaleks [220]

C sorry if it’s wrong

7 0

3 years ago

Is it true a single covalent bond involves two atoms sharing one pair of electrons

Dima020 [189]

Answer:

Yes

Explanation:

A single covalent bond forms when two atoms share one pair of electrons.

Covalent bonds are formed between two or more atoms having zero or very small electronegativity difference. Such bonds exists between molecules of non-metals.

To form a covalent bond, each of the two participating atoms would put down an unpaired electron.
The unpaired electrons form a shared pair of electrons between them.
This shared pair of electrons constitutes the electron cloud that binds the two atoms together.
The shared pair of electron is the covalent bond.

5 0

3 years ago