Other Chemistry Answers

Lesson 12. Questions 1 to 7—convert the following number of particles to number of moles:

a. 6.022 x 10²³ molecules of water

1. 3.011 x 10²⁴ atoms of iron
2. 6.022 x 10²⁰ Mg⁺² ions
3. 4.5165 x 10²³ molecules of CuSO₄
4. Avogadro's number of H atoms
5. 2.1077 x 10²⁴ molecules of CuSO₄
6. 4.5165 x 10¹⁹ NO₃^-1ions.

Calcium hydroxide and phosphoric acid react to form calcium phosphate and water. Find the moles of water, if you have 6.50 moles of calcium hydroxide.

a solution that can resits changes in PH is called a(n)

If the reaction between H2 and l2 to form HI were at equilibrium and an

additional 0.25 moles of H2 were added to the reaction, what would happen?

A. The equilibrium would shift in the direction of the products.

B. The equilibrium would shift in the direction of the additional reactant.

C. The equilibrium would not change.

D. The equilibrium would shift in the direction of the reactants.

25mL of the 40% ethanol solution is used to prepare the 10% ethanol. What is the final volume of the solution? And, how much water must be added to do the dilution?

120mL of water is added to 30mL of the 40% ethanol solution. What is the dilution factor? And, what is the concentration of the diluted solution?

Silver chromate (Ag2CrO4) precipitate into silver. Express answer in three significant figure.

Magnesium oxide (MgO) precipitate into magnesium. Express answer in three significant figures.

Solid calcium carbonate is heated and decomposes to solid calcium oxide and carbon dioxide gas.

Differences between oxygenated gasoline and reformulated gasoline