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3 years ago

10

What is the term for the amount of energy that is needed for a chemical reaction to occur?

1 answer:

cupoosta [38]3 years ago

3 0

<span>This would be the activation energy. This is usually in the form of heat, which allows the reaction to undergo some sort of transition. Many times, enzymes can be used as catalysts to lower the activation energy required for the reaction to take place.</span>

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The key elements of geosphere are trees, rocks, and dirt.<br><br> True or False

Dimas [21]

Answer: This is true!

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2 years ago

Which method of heat transfer is due to the transfer of kinetic energy from one molecule to another?

pshichka [43]

Answer: Conduction

Explanation:

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2 years ago

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Automotive air bags inflate when sodium azide, NaN3, decomposes explosively to its constituent elements. How many moles of nitro

attashe74 [19]

Answer:

2.29 g of N2

Explanation:

We have to start with the <u>chemical reaction</u>:

$NaN_3~->~Na~+~N_2$

The next step is to <u>balance the reaction</u>:

$2NaN_3~->~2Na~+~3N_2$

We can continue with the <u>mol calculation</u> using the molar mass of

$NaN_3$ (65 g/mol), so:

$3.55~g~NaN_3\frac{1~mol~NaN_3}{65~g~NaN_3}=0.054~mol~NaN_3$

Now, with the<u> molar ratio</u> between $NaN_3$ and $N_2$ we can <u>calculate the moles</u> of $N_2$ (2:3), so:

$0.054~mol~NaN_3\frac{3~mol~N_2}{2~mol~NaN_3}=0.0819~mol~N_2$

With the molar mass of $N_2$ we can <u>calculate the grams</u>:

$0.0819~mol~N_2=\frac{1~mol~N_2}{28~g~N_2}=2.29~g~N_2$

I hope it helps!

5 0

3 years ago

A plant uses energy from the sun to make food what kind of energy transformation is this

IRISSAK [1]

Answer:

photosynthesis

Explanation:

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3 years ago

Methane gas and chlorine gas react to form hydrogen chloride gas and carbon tetrachloride gas. What volume of carbon tetrachlori

mario62 [17]

Answer:

0.55mL of carbon tetrachloride

Explanation:

CH4(g) + 2Cl2(g) -------> CCl4(g) + 2H2(g)

From the balanced reaction equation

44800mL of chlorine produces 22400 ml of carbon tetrachloride

If 1.1mL of chlorine were consumed, volume of carbon tetrachloride= 1.1×22400/44800

=0.55mL of carbon tetrachloride

Note: 1 mole of a gas occupies 22.4L volume or 22400mL

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3 years ago