MOLAR VIEW T03/S11 If a sample of (NH4)2HPO4 is found to contain 3.79 mol of NH4* ions how many moles of HPO,2- ions are present? Molar Mass (g/mol) (NH4)2HPO4 НРО lon NH4* ion Avogadro's No. (mol1) 6.022x1023 132.06 95.980 18.039 the tolerance is +/-2%

2. A hydrocarbon was found to be 20% hydrogen by mass. If the molar mass is 30 g/mol, what is the molecular formula? А. СH В. СН C. CH3 D. C,H4 E. C2H. 3. If one mole of ammonium perchlorate is allowed to react with excess aluminum, how many molecules of water will be produced? 3NH,C1O, + 3A1 Al,O, 3NO 6H2O А. 3.61 x 1023 В. 1.00 х 1023 C. 6.02 x 1023 D. 1.20 x 1024 E. 3.01 x 1024 4. A mixture containing 0.40 mol Al in contact with 0.75 mol Cl, is ignited in a closed container. Assum ing complete reaction, which gives the maximum quantity of AICI, produced and quantity of unconsumed reactant? A. 0.40 mol AICI, and 0.15 mol Al unreacted B. 0.40 mol AICI, and 0.15 mol Cl, unreacted C. 0.40 mol AICI, and 0.35 mol Cl, unreacted D. 0.50 mol AICI, and 0.10 mol Alunreacted E. 0.50 mol AICI, and 0.15 mol Cl, unreacted

If 17.4 moles of 02 are completely reacted how many moles of S02 will be formed? Pertaining to the reaction 2PbS + 302 > 2PbO + 2SO2

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