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### 25 Cards in this Set

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 The molas mass of (NH4)2 SO4 is: 132g The % of Cl in KClO is: 29% The number of moles in 320g of NaOH is: 8 The empirical formula of a compound with a composition 65.2% Sc and 34.8% O is: Sc O The empirical formula of a compound 42.9%C and 57.1%O is: CO The molecular formula of a compound 92.3%C and 7.7%H which weighs 78g/mole is: C H The mass in grams of one molecule of CO is equal to: 7.3 x 10 g The molar mass of paradichloroenzene (C H Cl ) is 147g A compound is 26.8%Cr, 32.9%O and 40.3%K. The formula for this compound is: K CrO What is the mass of Carbon in 20g of C H ? hint: find % first. 16.4g If I placed 100 atoms of lead and 100 atoms of copper on a scale, which would weigh more? lead Which compound has the highest % of Cl NaClO If I divide a quantity of a compound by the molar mass of that compound I will determine: the number of moles Moles are proportional to: atoms and molecules Which of these represents a molecular formula C H How many molecules are in 1 mole of neon? 6.02 x 10 If I have 3.6 x 10 atoms, how many moles do I have? 6 moles How many particles does the molar mass of any substance contain? 6.02 x 10 What is the mass of 1 mole of water? 18g The first step in finding the empirical formula of a compound is to: determine the number of moles of each element. When balanced, the co-efficients of this equation are: KClO = KCl + O 2, 2, 3 When balanced the co-efficients of this equation are: CH + O = CO + H O 1,2,1,2 When balanced, the co-efficients of this equation are: H PO + Ca(OH) = Ca (Po ) + H O 2,3,1,6 How many moles of water are produced when .67 moles of NaOH H C O + 2NaOH = Na C O + 2H O 0.67 How many grams of aluminum are produced by the decomposition of 125g of Al O ? 2Al O = 4Al +3O 66