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ILL GIVE A BRAINLY PLS HELP

1.) How many O atoms are present in 5.00 moles of H2O?

a.)
3.01x1024 atoms

b.)
3.01 atoms

c.)
5 atoms

d.)
6.02x1024 atoms


2.) A sample of CO2 contains 1.8x1024 molecules. How many moles of carbon dioxide are in this sample?

a.)
6.02x1023 mol

b.)
3 mol

c.)
1.8 mol

d.)
3x1024 mol

Respuesta :

Atoms are the unit of the molecule of the compound. The 3.01 x 10²⁴  atoms of oxygen are present in 5 moles of water and 3 moles of carbon dioxide in the sample.

What are atoms?

Atoms are the smallest fundamental unit of the compounds that can be given by Avogadro's number.

For calculating the oxygen atoms in 5 mole water:

If 1 mole = 6.02 × 10²³

Then, 5 moles = 5 ×  6.02 × 10²³

Hence, 3.01 x 10²⁴ atoms of oxygen are present in 5 moles of water.

Moles of carbon dioxide in the sample is calculated as:

If 1 mole of carbon dioxide = 6.02 × 10²³ molecules

Then moles in 1.8 x 10²⁴ molecules will be,

(1.8 x 10²⁴ molecules) ÷ (6.02 × 10²³ molecules)  = 3 moles

Hence, 3 moles of carbon dioxide is present in the sample.

Learn more about Avogadro's number here:

https://brainly.com/question/5098076

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