Add up the compound's molar mass: Na=2(23), S=1(32), O=4(16). Sum is 142. Oxygen's part of that total is 64 (16x4). Percent is part/total, so 64/142 = 0.4507 = 45.1%.
The molar mass of sodium sulfate is 142.
The percent composition is:
- oxygen: 45,1 %
- sulfur: 22,5 %
- sodium: 32,4 %
Two - the trailing zeros are just placeholders.
4 significant figures.
There are 3 significant figures in 94.2.
52.5765
Trailing zeros ALWAYS count as significant figures, so 700.0 would have 4 significant figures.
4 significant figures.
10 significant figures.
Use the rules of significant figures to answer the following : 22.674 * 15.05. Answer: 341.2
Count the significant figures in each number. Calculate the minimum of these numbers. Do the multiplication Round the product to the LEAST number of significant figures, determined above.
203.05
102.03
302.6
302.05
3 of them.
203.9
80.07749999999999
The product is 67.30879 which means it has 7 significant figures