Chapter 3: Q 35E (page 169)
Question-Determine the percent ammonia (NH3) in Co (NH3)6Cl3 to three significant figures.
The percent ammonia in Co (NH3)6Cl3 is 38.2%.
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Question: A tube of toothpaste contains 0.76 g of sodium monofluorophosphate (Na2PO3F) in 100 mL.
(a) What mass of fluorine atoms in mg was present?
(b) How many fluorine atoms were present?
Question- Dichloroethane, a compound that is often used for dry cleaning, contains carbon, hydrogen, and chlorine. It has a molar mass of 99g/mol. Analysis of a sample shows that it contains 24.3% carbon and 4.1% hydrogen. What is its molecular formula?
Determine the mass of each of the following:
(a) 0.0146 mol KOH
(b) 10.2 mol ethane, C2H6
(c) 1.6×10−3 mol Na2SO4
(d) 6.854×103 mol glucose, C6 H12 O6
(e) 2.86 mol Co(NH3)6Cl3
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?
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