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Could you help me solve these questions?
1. If 3.00 g of a nitrogen-oxygen compound is found to contain 2.22 g of oxygen, what is the percentage of nitrogen in the compound?
a. (3.00/2.22)(100)
b. [(3.00 + 2.22)/3.00](100)
c. (2.22/3.00)(100)
d.[(3.00-2.22)/3.00](100)
e. [(3.00-2.22)/3.00](100)
2. A 10.0 liter sample of oxygen at 100 degrees Celsius and 1 atm is cooled at 27 degrees Celsius and expanded until the pressure is 0.5 atm. Find the volume of the oxygen.
3. How many grams of NaOH (40 g * mol^-1) are there in 250 mL of 0.4 M NaOH solution?
4. Which will be the final volume when 400 mL of 0.6 M HCl is diluted to 0.5 M HCl?
a. 400(0.5/0.6)
b. (0.6-0.5)(400)
c. (400)(0.6/0.5)
d. (1,000-400)(0.5/0.6)
e. (0.6/0.5)(1,000-400)
5. If 25 mL of 0.5 M NaOH neutralizes 35 mL of a monoprotic acid, which is the molarity of the acid?
a. [(0.025)(0.5)]/0.035
b. 0.065/[(0.025)/(0.5)]
c. 0.025/[(0.5)(0.035)]
d. (0.025)(0.5)(0.035)
e. [(0.035)(0.5)]/0.025
1. If 3.00 g of a nitrogen-oxygen compound is found to contain 2.22 g of oxygen, what is the percentage of nitrogen in the compound?
a. (3.00/2.22)(100)
b. [(3.00 + 2.22)/3.00](100)
c. (2.22/3.00)(100)
d.[(3.00-2.22)/3.00](100)
e. [(3.00-2.22)/3.00](100)
2. A 10.0 liter sample of oxygen at 100 degrees Celsius and 1 atm is cooled at 27 degrees Celsius and expanded until the pressure is 0.5 atm. Find the volume of the oxygen.
3. How many grams of NaOH (40 g * mol^-1) are there in 250 mL of 0.4 M NaOH solution?
4. Which will be the final volume when 400 mL of 0.6 M HCl is diluted to 0.5 M HCl?
a. 400(0.5/0.6)
b. (0.6-0.5)(400)
c. (400)(0.6/0.5)
d. (1,000-400)(0.5/0.6)
e. (0.6/0.5)(1,000-400)
5. If 25 mL of 0.5 M NaOH neutralizes 35 mL of a monoprotic acid, which is the molarity of the acid?
a. [(0.025)(0.5)]/0.035
b. 0.065/[(0.025)/(0.5)]
c. 0.025/[(0.5)(0.035)]
d. (0.025)(0.5)(0.035)
e. [(0.035)(0.5)]/0.025