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S_A_V [24]
3 years ago
11

How many significant figures are there in this expression 0.001050

Chemistry
2 answers:
Angelina_Jolie [31]3 years ago
8 0
1.all non zero digit are significant
2.zero b/w non-zero digits are significant
3.if number is less than 1 zero on right of decimal point but to the  left of first non-zero digit are not significant


here 4 significant figures are there in 0.001050
123 -3 significant figures
123000-3 significant figures
2.107 - 4 significant figures
0.5610 - 4 significant figures

WITCHER [35]3 years ago
4 0
4 sig fig in that expression
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A 4.215 g sample of a compound containing only carbon, hydrogen, and oxygen is burned in an excess of oxygen gas, producing 9.58
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Answer:

\% O=27.6\%

Explanation:

Hello,

In this case, for the sample of the given compound, we can compute the moles of each atom (carbon, hydrogen and oxygen) that is present in the sample as shown below:

- Moles of carbon are contained in the 9.582 grams of carbon dioxide:

n_C=9.582gCO_2*\frac{1molCO_2}{44gCO_2}*\frac{1molC}{1molCO_2}  =0.218molC

- Moles of hydrogen are contained in the 3.922 grams of water:

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