a raindrop contains about 0.05 gram of water a) how many molecules of a water are there in a drop b) how many hydrogen atoms are in a drop c) how many oxygen atoms are in a drop what is the empirical formula of the compound that contains 53.73% iron and 46.27% sulfur. please answer to the question
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1. 18 grams of water contains= 6.02*10^23 molecules.
0.05 grams of water contains= 6.02*10^23*0.05/18= 1.67*10^21 molecules. (ans.)
2. 1 molecule of water contains= 2 atoms of hydrogen.
1.67*10^21 molecules of water contains= 2*1.67*10^21= 3.34*10^21 atoms of hydrogen. (ans.)
3. 1 molecule of water contains= 1 atoms of oxygen.
1.61*10^21 molecules of water contains= 1.67*10^21 atoms of oxygen. (ans.)
4. Element Percentage Atomic Weight Percentage/at.wt. Least Ratio
Fe 53.73 56 53.73/56=0.95 0.95/0.95=1
S 46.27 32 46.27/32=1.44 1.44/0.95=1.5
(continuation of the table)
Simple Ratio
2*1=2
2*1.5=3
Therefore, empirical formula of the compound is Fe2S3.
0.05 grams of water contains= 6.02*10^23*0.05/18= 1.67*10^21 molecules. (ans.)
2. 1 molecule of water contains= 2 atoms of hydrogen.
1.67*10^21 molecules of water contains= 2*1.67*10^21= 3.34*10^21 atoms of hydrogen. (ans.)
3. 1 molecule of water contains= 1 atoms of oxygen.
1.61*10^21 molecules of water contains= 1.67*10^21 atoms of oxygen. (ans.)
4. Element Percentage Atomic Weight Percentage/at.wt. Least Ratio
Fe 53.73 56 53.73/56=0.95 0.95/0.95=1
S 46.27 32 46.27/32=1.44 1.44/0.95=1.5
(continuation of the table)
Simple Ratio
2*1=2
2*1.5=3
Therefore, empirical formula of the compound is Fe2S3.
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