What is one effect of the Gulf Stream
2 answers:
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Answer:
A;
Explanation:
The best way to start solving this problem is to start with the molecule with the most atoms. Since there are 12 carbons on the left, you need 12 on the right so 12 would need to be placed in front of carbon dioxide. Also you need 22 hydrogens and in each molecule of water, there are two hydrogen molecules so you need 11 molecules of water. After balancing you find that you need 24 oxygen on the left so you place the coeffecient 12 in front of the oxygen molecule.
<u>Answer:</u> The percentage by mass of NaCl in the mixture is 38.5 %
<u>Explanation:</u>
To calculate the mass percentage of element in compound, we use the equation:
.......(1)
- <u>For NaCl:</u>
Mass of sodium element = 23 g
Mass of NaCl = 58.5 g
Putting values in equation 1, we get:
Mass fraction of sodium metal in NaCl = 0.3932
- <u>For
:</u>
Mass of sodium element = 23 g
Mass of = 85 g
Putting values in equation 1, we get:
Mass fraction of sodium metal in sodium nitrate = 0.271
Let us assume the mass fraction of NaCl in the mixture is 'x'
So, the mass fraction of in the mixture will be '(1-x)'
We are given:
Percent by mass of Na in the mixture = 31.8 %
Mass fraction of Na in the mixture = 0.318
Evaluating the mass fraction of NaCl in the mixture:
x = 0.385
Percent by mass of NaCl in the mixture will be =
Hence, the percentage by mass of NaCl in the mixture is 38.5 %