Multiple ChoiceA solution is prepared by adding 29.0 L of KNO3 to 512 L of water. What is the percent by volume of KNO3 in the solution?34views
Multiple ChoiceSterling silver is an alloy commonly used in jewelry and contains silver and other metals. What is the mass percent of silver in sterling silver?12views
Multiple ChoiceWhich of the following best describes how to calculate the percent by mass of each element in a compound?32views
Multiple ChoiceMorphine has the molecular formula C17H19NO3. What is the mass percentage of carbon (C) in morphine? Provide your answer to two decimal places.75views
Multiple ChoiceIf a bottle of vinegar contains 5.45% acetic acid by mass, how many grams of acetic acid are present in 250 g of vinegar?24views
Multiple ChoiceWhat is the percent by mass of a solution prepared by dissolving 25 g of KNO_3 in 400.0 g of H_2O?31views
Multiple ChoiceWhat is the percent by mass of hydrogen in NH_3 if the gram formula mass is 17.0 grams?28views
Multiple ChoiceWhat is the percent composition by mass of sulfur in the sulfate ion (SO_4^{2-})?10views
Multiple ChoiceWhat is the mass percent of sodium (Na) in sodium hydrogen carbonate (NaHCO_3)?19views
Multiple ChoiceWhich of the following best represents the mass percent of Earth's water that is fresh water?25views