The correct answer is b. In a single-displacement reaction one element replaces another one, and because of BrINClHOF we know that hydrogen must have a 2 with it when it's by itself. Since calcium is +2 and chlorine is -1, you have to cross the charges. So it would be CaCl2.
Answer:
C1 * V1 = C2 * V2
Explanation:
Where ‘C’ and ‘V’ refer to concentration and volume, ‘1’ and ‘2’ to solution 1 and 2 respectively. So, if ‘1’ refers to the HCl solution, we want to solve this equation for C1.
V1 = (C2*V2)/C1 = (0.4 * 50)/40 = 0.5 M
Balanced equation
2CO (g) + O2 (g) yields 2CO2 (g)
Stoichiometry
1 moles of Oxygen produce 2 moles of Carbon dioxide
Number of moles is proportional to Volume [same temperature and same pressure]
Then 2 liters of Oxygen produce 4 liters of carbon dioxide.
Answer C: 4.0 L
I think the answer maybe a, or c
