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SCORPION-xisa [38]
3 years ago
13

Changing the Rate of Reaction

Chemistry
1 answer:
Lisa [10]3 years ago
3 0

give brainliest pls thanksss

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An oxide of nitrogen contains 30.45 mass % N.
N76 [4]

An oxide of nitrogen contains 30.45 mass % N, if the molar mass is 90± 5 g/mol the molecular formula is N₂O₄.

<h3>What is molar mass?</h3>

The molar mass of a chemical compound is determined by dividing its mass by the quantity of that compound, expressed as the number of moles in the sample, measured in moles. A substance's molar mass is one of its properties. The compound's molar mass is an average over numerous samples, which frequently have different masses because of isotopes.

<h3>How to find the molecular formula?</h3>

The whole-number multiple is defined as follows.

Whole-number multiple = \frac{molar mass (g/mol)}{empirical formula mass (g/mol)}

The empirical formula mass is shown below.

Mw of empirical formula = Mw of N+ 2 x (Mw of O)

                                      = 14.01 g/mol + 2 x (16.00 g/mol)

                                      = 46.01 g/mol

With the given molar mass or the molecular formula mass, we can get the whole-number multiple for the compound.

Whole-number multiple = \frac{90 g/mol }{46.01 g/mol} ≈ 2

Multiplying the subscripts of NO2 by 2, the molecular formula is N(1x2)O(2x2)= N2O4.

To learn more about molar mass visit:

brainly.com/question/12127540

#SPJ4

5 0
1 year ago
Calculate the kinetic energy of a 150 g baseball moving at a speed of 40. m/s (89 mph).
LUCKY_DIMON [66]
Kinetic Energy= 0.5 times velocity squared times mass
So KE= 0.5times 150 times 40 squared

(Use a calculator)
And don't forget units
6 0
3 years ago
What is the mass in grams of 0.0015 mol of aspirin (C9H8O4)
almond37 [142]

Answer:

116.1 g

Explanation:

3 0
2 years ago
Read 2 more answers
2Li+2H2O—&gt;2LiOH+H2
taurus [48]

Explanation:

2Li+2H2O—>2LiOH+H2

Calculate the mass of reacted lithium when H2 is 6.02 * 10 ^ 23 molecules.

I really need the answer with all the calculation please.

3 0
2 years ago
Let the simulator run for 30 seconds. What happens to the size of the ice?
Shkiper50 [21]

  1. 10 is your answer hope it helps you.......... Xd
<h2>Answer : 10 </h2>
7 0
2 years ago
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