Question

1. 27 Zo + 72 AMvT3 = 27 Zo(MvT3)2 + ? MvT + 36 A2T Look...

1.

27 Zo + 72 AMvT3 = 27 Zo(MvT3)2 + ? MvT + 36 A2T

Look at the chemical equation shown above. What number should be used in place of the ? to balance the equation? show work

2. Megan and Mindy are trying to balance the following chemical reaction equation: H2 + O2 => H2O

What is the balanced equation? show work

3. Senem is trying to balance the following equation:

3Pb(OH)2 + ?H2SO4 => 3PbSO4 + 6H2O

What number should be used to replace the question mark (?) shown in the equation above to balance it?

a. 2

b. 1

c. 0

d. 4

e. 3

4. The solubility limit of sucrose (also known as table sugar) in water is 2,000. grams per Liter of water at 25oC. If Tina has 447 grams of sucrose, how many grams of it will dissolve in 113 mL of water at 25oC? Remember that there are 1,000 mL in 1 L. show work.

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