Multiple ChoiceHow many atoms of calcium, phosphorus, and oxygen are present in one formula unit of Ca3(PO4)2?52views
Multiple ChoiceGiven the compound 4Na3PO4, how many atoms of sodium (Na), phosphorus (P), and oxygen (O) are present in total?49views
Multiple ChoiceGiven a sample containing 3.72 g of phosphorus (P) and 21.28 g of chlorine (Cl), what is the empirical formula of the compound formed?43views
Multiple ChoiceWhich of the following is the empirical formula for a compound that is 36.86% nitrogen (N) and 63.14% oxygen (O) by mass?59views
Multiple ChoiceHow many total atoms are present in one formula unit of cobalt hydroxide, Co(OH)_2?38views
Multiple ChoiceHow many oxygen atoms are present in the empirical formula unit of magnesium chlorate?51views
Multiple ChoiceWhich of the following compounds has the same empirical formula as its molecular formula?51views
Multiple ChoiceA compound contains 57.5% Na and 42.5% S by mass. What is the empirical formula of this compound?38views
Multiple ChoiceWhich of the following represents the empirical formula for the compound with the molecular formula x_4y_8?40views
Multiple ChoiceA compound is found to be 66.6% carbon and 33.4% hydrogen by mass. What is the empirical formula of this compound?44views
Multiple ChoiceA compound is found to contain 53.5% carbon, 15.5% hydrogen, and 31.0% nitrogen by mass. What is the empirical formula of this substance?36views