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PLEASE ANSWER EVERY QUESTION 1) Caffeine, C8H10N4O2, is a stimulant found in soft drinks and coffee....

PLEASE ANSWER EVERY QUESTION

1) Caffeine, C8H10N4O2, is a stimulant found in soft drinks and coffee. How many grams of caffeine are in 0.0150 mol of this compound?

2) Nitroglycerine is used both in the manufacture of dynamite and as a treatment for heart patients. It has the molecular formula C3H5(NO3)3. What is the molecular weight of nitroglycerine in atomic mass.

3) isopropyl alcohol, which is also known as rubbing alcohol, has the formula C3H8O. How many molecules of C3H8O are in 0.652 mol C3H8O?

4) Balance the combustion reaction given below:

   C4H10(g) + O2(g) ------------ CO2(g) + H2O(l)

How many grams of oxygen are required to react exactly with 2.00g of butane (C4H10)?

5) A method of preparing elemental phosphorous from rock ores is shown below. Balance the reaction;

Ca3(PO4)2 (s) + C(s) + SiO2(s) --------------    CaSiO3 (l) + CO(g) + P4(g)

If 2.60 mol of Ca3(PO4)2 (s) , 10.0 mol C, and 7.80 mol CaSiO3 (l) are combined to perform this reaction, which statement regarding the system is true?

6) Use the following balanced chemical equation to work the following problem.

CaC2 + 2H2O    ---------- C2H2 + Ca(OH)2

   An excess of water is reacted with 25.0 g of calcium carbide. A mass of 7.20 g of C2H2 is obtained. What is the percent yield of C2H2?

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