Vinegar (acetic acid solution) is a polar substance, whereas olive oil is non polar in nature. Like dissolves like. A polar substance cannot dissolve in a non polar compound. Therefore, vinegar which is polar is not soluble in olive oil, a non polar substance. Hence, in a salad dressing olive oil separates out from vinegar.
Added salt would dissolve in vinegar solution as salt, a polar substance which is chemically, sodium chloride is an ionic substance. It can dissolve in the polar vinegar solution but not olive oil.
CThe answer is 64%.
(1) Calculate the molar mass of N2O which is the sume of atomic masses of its elements:
Mr(N2O) = 2Ar(N) + Ar(O)
Ar(N) = 14 g
Ar(O) = 16 g
Mr(N2O) = 2 * 14 + 16 = 28 + 16 = 42 g
(2) Calculate mass percentage of nitrogen in N2O.
Total mass is 44 g: 44g is 100%
Mass of nitrogen is 28 g: 28g is x%
44 g : 100% = 28 g : x
x = 28 g * 100% : 44 g
x = 63.64% ≈ 64%
C=0.184 mol/L
n=0.113 mol
n=CV
V=n/C
V=0.113/0.184=0.614 L = 614 mL
Answer:
Explanation:
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In this case, it is widely known that when measurements with different significant figures are put under mathematical operations, the final result must be displayed with the same amount of significant figures of the shortest measurement, thus, due to the fact that 5.5 g has two significant figures only the result is consequently shown with two significant figures as well as shown down below:
By rounding the first six to seven due to the fact that the next six is greater than five, according to rounding rules, the result is:
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Answer:
Heating causes fluid to expand in volume by reducing its density.
Explanation: