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Anna007 [38]
3 years ago
13

The product of a number and 3 is the same as the sum of that number and six

Chemistry
2 answers:
attashe74 [19]3 years ago
8 0
The number is 3
because if the number was x it would be 3x=x+6
And x=3
Ann [662]3 years ago
8 0

Answer:

x=3

Explanation:

Hello,

Such equality in this case is:

3x=6+x

Solving for x one obtains:

3x-x=6\\2x=6\\x=\frac{6}{2}\\ x=3

Best regards.

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A 35.40 gram hydrate of sodium carbonate, Na2CO3•nH2O, is heated to a constant mass. Its final weight is 30.2 g. What is formula
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Answer:

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Convert masses to moles:

30.2 g Na₂CO₃ × (1 mol Na₂CO₃ / 106 g Na₂CO₃) = 0.285 mol Na₂CO₃

5.2 g H₂O × (1 mol H₂O / 18.0 g H₂O) = 0.289 mol H₂O

Normalize by dividing by the smallest:

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The ratio is approximately 1:1.  So the formula of the hydrate is Na₂CO₃•H₂O.

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