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Mole Concept

Q. How many moles of each atom are there in 5 moles of Co3(PO4)2?

Solved • Apr 20, 2020

Mole Concept

Q. Assume that you have 1.45 g of nitroglycerin in a 662.0 mL steel container at 20.0 °C and 1.00 atm pressure. An explosion occurs, raising the temperature of the container and its contents to 425 °C. The balanced equation is 4 C3H5N3O9(l) → 12 CO2(g) + 10H2O(g) + 6 N2(g) + O2(g) (Figure 1) How many moles of nitroglycerin were in the container originally?

Solved • Apr 13, 2020

Mole Concept

Q. Valery has 6.15g of sulfur dioxide gas in a 5.0 L container. a. how many sulfur dioxide molecules is that? b. how many atoms of oxygen does she have?

Solved • Apr 15, 2020

Mole Concept

Q. How many ions are present in 30.0 mL of 0.600 M Li2CO3 solution? a) 2.17 x 10^22 ions b) 1.08 x 10^22 ions c) 3.61 x 10^21 ions d) 3.25 x 10^22 ions e) 5.42 x 10^22 ions

Solved • Apr 13, 2020

Mole Concept

Q. Galvanized nails are iron nails that have been plated with zinc to prevent rusting. The relevant reaction is Zn^2+(aq) + 2e^- → Zn(s) For a large batch of nails, a manufacturer needs to plate a total zinc mass of 4.00 kg on the surface to get adequate coverage. How many moles of zinc are in 4.00 kg of zinc? Express your answer to three significant figures and include the appropriate units.

Solved • Apr 6, 2020

Mole Concept

Q. While you were cleaning the lab, you found a bottle with 150.0 mL of liquid labeled "1.50 M Sulfuric Acid." Since sulfuric acid is no longer used in your lab, your advisor asks you to prepare it for waste disposal by neutralizing it. What is the actual concentration of the sulfuric acid if it took 250.0 mL of 2.45 M NaOH to neutralize it?

Solved • Apr 4, 2020

Mole Concept

Q. While you were cleaning the lab, you found a bottle with 150.0 mL of liquid labeled "1.50 M Sulfuric Acid." Since sulfuric acid is no longer used in your lab, your advisor asks you to prepare it for waste disposal by neutralizing it. How many milliliters of a previously standardized 2.45 M NaOH would be required to neutralize this acid solution, assuming the bottle is correctly labeled?

Solved • Apr 4, 2020