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Elena L [17]
3 years ago
12

What is the mass of 4.5 x 10^22 molecules of hydrogen peroxide H2O2

Chemistry
1 answer:
Oksana_A [137]3 years ago
5 0

Answer:

The answer is 2.54g

To find the mass we must first find the number of moles we use the Formula ;

N = n × L

where

N is the number of entities

n is the number of moles

L is the Avogadro's constant which is

6.023 × 10^23

n = N / L

N = 4.5 x 10^22 molecules

n = 4.5 x 10^22 / 6.023 × 10^23

n = 0.0747 moles

Molar mass = mass / number of moles

Molar mass of H2O2 = (2 × 1) + (16 × 2)

= 2 + 32

= 34g/mol

mass = molar mass × number of moles

= 34 × 0.0747

= 2.5398

= 2.54g

Hope this helps

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