Stoichiometry answer all please
1. Balance this equation:
C 2 H 5 OH (l) + O 2(g) CO 2(g) + H 2 O (g)
a. Interpret the equation in terms of numbers of molecules and moles.
b. Show that the balanced equation obeys the law of conservation of mass.
2. Isopropyl alcohol (C 3 H 7 OH) burns in air according to this equation:
C 3 H 7 OH (l) + O 2(g) CO 2(g) + H 2 O (g)
a. Calculate the moles of oxygen needed to react with 3.40 mol C 3 H 7 OH.
b. Find the moles of each product formed when 3.40 mol C 3 H 7 OH reacts with oxygen.
3. Hydrofluoric acid cannot be stored in glass bottles because compounds called silicates
in the glass are attacked by the HF. Sodium silicate reacts as follows:
Na 2 SiO 3(s) + HF (aq) H 2 SiF 6 (aq) + NaF (aq) + H 2 O (l)
a. How many moles of HF are needed to react with 0.300 mol of Na 2 SiO 3 ?
b. How many grams of NaF form when 0.500 mol of HF reacts with excess Na 2 SiO 3 ?
c. How many grams of Na 2 SiO 3 can react with 0.800 g of HF?
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