Suppose you titrate 80.0 mL of 2.00 M NaOH with 20.0 mL of 4.00 M HCl. What is the finalconcentration of OH−ions? A. 0.600 M B. 0.800 M C. 1.20 M D. 1.40 M E. 1.60 M
Question 17
A) Suppose you titrate 80.0 mL of 2.00 M NaOH with 20.0 mL of 4.00 M HCl. What is the finalconcentration of OH−ions?
A. 0.600 M
B. 0.800 M
C. 1.20 M
D. 1.40 M
E. 1.60 M
B) Air-bags can be inflated by the decomposition of sodium azide, NaN3. How many moles ofN2(g) are produced by the decomposition of 260 g NaN3 under the following UNBALANCED
NaN3(s)→Na(l) + N2(g)
You must balance the equation before completing the problem.
A. 1.0 moles N2(g)
B. 2.0 moles N2(g)
C. 4.0 moles N2(g)
D. 6.0 moles N2(g)
E. 8.0 moles N2(g)
C) Calcium carbonate reacts with acetic acid following the UNBALANCED chemical reaction:
CaCO3+ CH3COOH→Ca(CH3COO)2+ CO2+ H2O
How many moles of CO2are produced by the decomposition of 240 g CH3COOH? You must balancethe equation before completing the problem.
A. 1.0 moles CO2
B. 2.0 moles CO2
C. 3.0 moles CO2
D. 4.0 moles CO2
E. 5.0 moles CO2
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