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Chapter 3: Q 61E (page 171)
Question:What volume of a 0.33-M C12H22O11 solution can be diluted to prepare 25 mL of a solution with a concentration of 0.025 M?
The volume of\({C_{12}}{H_{22}}{O_{11}}\)stock solution needs 1.9mL.
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What is the mass of 0.443 mol of hydrazine, N2H4?
What volume of a 0.20-M K2SO4 solution contains 57 g of K2SO4?
Question- Determine the empirical formula for the compounds with the following percentage composition:
(a) 15.8% carbon and 84.2% sulfur.
(b) 40% carbon, 6.7% hydrogen, and 53.3% oxygen.
Which of the following represents the least number of molecules?
(a) 20.0 g of H2O (18.02 g/mol)
(b) 77.0 g of CH4 (16.06 g/mol)
(c) 68.0 g of CaH2 (42.09 g/mol)
(d) 100.0 g of N2O (44.02 g/mol)
(e) 84.0 g of HF (20.01 g/mol)
44. Explain what changes and what stays the same when 1.00 L of a solution of NaCl is diluted to 1.80 L.
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