1) Balance the following equation (a) C+O2--->CO (B) KOH+H3PO4--->K3PO4+H2O (C)
ID: 779377 • Letter: 1
Question
1) Balance the following equation
(a) C+O2--->CO
(B) KOH+H3PO4--->K3PO4+H2O
(C) N2+H2--->NH3
(D) K+H2O--->KOH+H2
2) Nitrogen and hydrogen react to form ammonia according to the following balanced equation:
N2(g)+3H2(g)--->2NH3(g)
calculate the number of moles of hydrogen required to react with 0.0929 mole of nitrogen, and the number of moles of ammonia that will form
moles of hydrogen=?
moles of ammonia=?
3) pheromones are a special type of compound secreted by the females of many insect species to attract the moles for mating. One pheromone has the molecular formula C19H38O. Normally, the amount of this pheromone secreted by a female insect is about 1.4*10^-12g. How many molecules does this quantity contain? (scientific notation).
Explanation / Answer
1)
(a) 2C+O2--->2CO
(B) 3KOH+H3PO4--->K3PO4+3H2O
(C) N2+3H2--->2NH3
(D)2 K+2H2O--->2KOH+H2
2)moles of hydrogen=0.929*3
=0.2787
moles of NH3=0.0929*2
=0.1858
3)number of molecules=6.023*10^23*1.4*10^-12/282
=3*10/69 molecules
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