1. What is the mass percent composition of: Hydrogen in CH3OH 2. A car engine tu

Question

1. What is the mass percent composition of:
Hydrogen in CH3OH 2. A car engine turns gasoline into exhaust gasses is it aphysical or chemical. 3. Oxygen has a boiling point of -183C and Nitrogen has aboiling point of -196C. Which is a liquid and which is a gas at-193C? 4. Which of the following chemical equetions arebalanced? a. Mg(s)+2HCl(aq)=Mg Cl2(aq)+H2(g) b. 3 Al(g)+3 Br2(l)= Al2Br3(s) c. 2 HgO(s)=2 Hg(l)+O2(g) d. 2 C4H10(g)+13 O2(g)=8 CO2(g)+10 H2O(l) 1. What is the mass percent composition of:
Hydrogen in CH3OH 2. A car engine turns gasoline into exhaust gasses is it aphysical or chemical. 3. Oxygen has a boiling point of -183C and Nitrogen has aboiling point of -196C. Which is a liquid and which is a gas at-193C? 4. Which of the following chemical equetions arebalanced? a. Mg(s)+2HCl(aq)=Mg Cl2(aq)+H2(g) b. 3 Al(g)+3 Br2(l)= Al2Br3(s) c. 2 HgO(s)=2 Hg(l)+O2(g) d. 2 C4H10(g)+13 O2(g)=8 CO2(g)+10 H2O(l) 3. Oxygen has a boiling point of -183C and Nitrogen has aboiling point of -196C. Which is a liquid and which is a gas at-193C? 4. Which of the following chemical equetions arebalanced? a. Mg(s)+2HCl(aq)=Mg Cl2(aq)+H2(g) b. 3 Al(g)+3 Br2(l)= Al2Br3(s) c. 2 HgO(s)=2 Hg(l)+O2(g) d. 2 C4H10(g)+13 O2(g)=8 CO2(g)+10 H2O(l)

Explanation / Answer

1.   12.5% 2.   chemical 3.   nitrogen is liquid and oxygen is gas 4.   a, c , d

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