explain your explain:
1. Hydrogen peroxide, H2O2, decomposes catalytically in the presence of metal ions and enzymes called "peroxidases." You may have noticed this reaction occurring if you've used the drugstore solution of hydrogen peroxide as a mouthwash or antiseptic. The reaction is
2 H2O2 → 2 H2O + O2
If a 250-mL bottle of hydrogen peroxide solution containing 3.0% H2O2 (by mass) completely decomposed how many liters of gas would it generate. Assume that one mole of gas occupies a volume of 22.4 L and that the density of the solution is 1 g/mL.
A. 2.47 L
B. 4.94 L
C. 9.88 L
D. 22.4 L
2. Silver nitrite, AgNO2 (47.8 mg), was dissolved in water to make 10.00 mL of solution. Then 3.0 mL of that solution was used to make a new solution with a total volume of 1.000 L. What was the concentration of the silver ion in the final solution?
A. 9.32 × 10-3 M
B. 1.43 × 10-2 M
C. 9.32 × 10-5 M
D. 14.34 M
3. If one regular Tums tablet contains 500 mg of CaCO3(s), how many mL of 1.0 M stomach acid (HCl) could it neutralize?
A. 5 mL
B. 10 mL
C. 50 mL
D. 100 mL
4. Fizzy Cola contains phosphoric acid, H3PO4. In order to determine the concentration of phosphoric acid in 50.0 mL of Fizzy Cola, a precipitation reaction with excess silver nitrate was carried out. The product, silver phosphate, was dried and found to weigh 0.0576 g. What is the concentration of phosphoric acid in Fizzy Cola?
A. 0.255 M
B. 9.17 × 10-7 M
C. 8.25 × 10-3 M
D. 2.75 × 10-3 M
5.Determine the molar concentration of ethanol (C2H6O) in a wine that is 14% ethanol by mass. The density of this wine is 0.93 g/cm3.
A. 0.063 M
B. 13.0 M
C. 0.14 M
D. 2.8 M
1. Hydrogen peroxide, H2O2, decomposes catalytically in the presence of metal ions and enzymes called "peroxidases." You may have noticed this reaction occurring if you've used the drugstore solution of hydrogen peroxide as a mouthwash or antiseptic. The reaction is
2 H2O2 → 2 H2O + O2
If a 250-mL bottle of hydrogen peroxide solution containing 3.0% H2O2 (by mass) completely decomposed how many liters of gas would it generate. Assume that one mole of gas occupies a volume of 22.4 L and that the density of the solution is 1 g/mL.
A. 2.47 L
B. 4.94 L
C. 9.88 L
D. 22.4 L
2. Silver nitrite, AgNO2 (47.8 mg), was dissolved in water to make 10.00 mL of solution. Then 3.0 mL of that solution was used to make a new solution with a total volume of 1.000 L. What was the concentration of the silver ion in the final solution?
A. 9.32 × 10-3 M
B. 1.43 × 10-2 M
C. 9.32 × 10-5 M
D. 14.34 M
3. If one regular Tums tablet contains 500 mg of CaCO3(s), how many mL of 1.0 M stomach acid (HCl) could it neutralize?
A. 5 mL
B. 10 mL
C. 50 mL
D. 100 mL
4. Fizzy Cola contains phosphoric acid, H3PO4. In order to determine the concentration of phosphoric acid in 50.0 mL of Fizzy Cola, a precipitation reaction with excess silver nitrate was carried out. The product, silver phosphate, was dried and found to weigh 0.0576 g. What is the concentration of phosphoric acid in Fizzy Cola?
A. 0.255 M
B. 9.17 × 10-7 M
C. 8.25 × 10-3 M
D. 2.75 × 10-3 M
5.Determine the molar concentration of ethanol (C2H6O) in a wine that is 14% ethanol by mass. The density of this wine is 0.93 g/cm3.
A. 0.063 M
B. 13.0 M
C. 0.14 M
D. 2.8 M