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arlik [135]
3 years ago
8

To the nearest whole number how many moles are in 130 g sample of calcium metal?

Chemistry
1 answer:
lesantik [10]3 years ago
6 0
To convert grams to moles, we need the molar mass of the element or compound. remember you can determine the molar mass of a molecule by adding the atomic mass of each atom from the periodic table.

molar mass of Na= 23.0 g/ mol

130 g (1 mol Na/ 23.0 grams)= 5.65 moles or 6 moles.
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The cost of painting the circular traffic sign shown below is $3.50 per square foot. How much, to the nearest dollar, will it co
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The cost of painting the traffic sign of 7.065 square feet is approximately equal to 25 dollar.

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