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1.(4.99x10^2) mL of 0.150-mol/L KBr(aq) is mixed with excess Pb(NO...

1.(4.99x10^2) mL of 0.150-mol/L KBr(aq) is mixed with excess Pb(NO3)2(aq). Calculate the number of moles of precipitate.

Note: Your answer is assumed to be reduced to the highest power possible.

Your Answer:


x10

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2. 30 g of iron reacts with 10g of oxygen to form rust (Fe3O2). Which reactant is the limiting reactant, and how much excess will there be?


Iron is the limiting reactant, there will be an excess of 2.6 x 10^-1 mol of oxygen left


Oxygen is the limiting reactant, there will be an excess of 2.6 x 10^-1 mol of iron left


Oxygen is the limiting reactant, there will be an excess of 4.9 x 10^-1 mol of iron left


Iron is the limiting reactant, there will be an excess of 4.9 x 10^-1 mol of oxygen left



3. (2.5000x10^-1) L of methane, CH4(g), is combusted with (7.50x10^-1) L of oxygen gas in STP conditions. Once the reaction is completely finished, how many moles of the excess reagent remains?

Note: Your answer is assumed to be reduced to the highest power possible.

Your Answer:


  x10

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4. A (1.60x10^1) g piece of copper reacts with (7.2000x10^1) g of silver nitrate dissolved in solution. What mass of silver will be formed from this reaction?

Note: Your answer is assumed to be reduced to the highest power possible.

Your Answer:


x10

Answer units

 


5. Approximately (4.52x10^0) g of lead(II) acetate, Pb(CH3COO)2, is weighed out and placed in a (2.9800x10^2) mL solution of 0.150-mol/L sodium hydroxide. Calculate the mass of precipitate produced in this reaction. 

Note: Your answer is assumed to be reduced to the highest power possible.

Your Answer:


x10

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