Answer:
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Explanation:
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DNA
Nucleoulos
Nuclear Membrane
The main formula is
% = molar mass of elements / total molecular molar mass) x100
<span>M (Ca(C2H3O2)2) = 2*(12*2 +3*1+16*2) + 40=158
so
</span>%Ca= 40/158<span>x 100=0.25</span><span>x 100= 25%
</span>
%C= 12/158 x 100= 0.07x 100=7%
%H= 1/158x 100=0.006x 100=0.6%
%O=16/158x 100= 0.101x 100= 10.12%
Answer:
Explanation:
3.
Knowns: 100mL of solution; concentration of 0.7M
Unknown: number of moles
Equation: number of moles = volume * concentration
Plug and Chug: number of moles = 100/1000 * 0.7 = 0.07 mole
Final Answer: 0.07mole
2.
Knowns: 5.50L of solution; concentration of 0.400M
Unknown: number of moles
Equation: number of moles = volume * concentration
Plug and Chug: number of moles = 5.5 * 0.4 = 2.20 mole
Final Answer: 2.20 mole