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spayn [35]
3 years ago
9

How many moles of H2O contain 3.99 x 10^65 molecules? *

Chemistry
1 answer:
Andre45 [30]3 years ago
5 0

Answer:

0.66 × 10⁴² mol

Explanation:

Given data:

Moles of  water = ?

Number of molecules of water = 3.99× 10⁶⁵ molecules

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

1 mole = 6.022 × 10²³ molecules of water

3.99× 10⁶⁵ molecules × 1 mol /  6.022 × 10²³ molecules

0.66 × 10⁴² mol

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Explanation:

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3 0
3 years ago
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
algol13

Answer:

x = 4.5

4.5 moles of C2H6  is required to produce 13.5 moles of H2O

Explanation:

Given equation is :

2 C2H6 + 7 O2 → 4 CO2 + 6 H2O

if it requires 2 moles of C2H6 to produce 6 moles of H2O

then x moles of C2H6 is required to produce 13.5 moles of H2O

Using unitary method for solving, we get

x = 13.5 x 2 / 6

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Therefore, 4.5 moles of C2H6  is required to produce 13.5 moles of H2O

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