Review

Unit Conversions

100

How many inches are in 250000.00 CM

(1 inch = 2.54 cm) 

What is 98425.1969 Inches

200

How many microliters are in 200L

(1L = 10⁶uL)

2*10⁸ uL

300

How many mL in 50L

(1L =1000mL)

50000 L 

400

Convert 36.85C to K

K=C+ 273.15

310K

500

500 um to mm

.5mm 

Balancing Equations

100

Balance the Equation 

Na +  O2 -> Na2O

_4__ Na + _1__ O₂ -> _2__ Na₂O

200

Balance the Equation 

Al(OH)₃ + H₂SO₄ -> Al₂(SO₄)₃ +  H₂O

___2__Al(OH)₃ + _3__ H₂SO₄ -> _1__ Al₂(SO₄)₃ + _6__ H₂O

300

Balance the Equation 

 C₁₀H₂₂ + O₂ ->   CO₂ +  H₂O

_2__ C₁₀H₂₂ + _31__ O₂  -> _20__ CO₂ + _22__ H₂O

400

Balance the Equation

______ C₆H₆ + ___ O₂ -> _______ CO₂ + ___ H₂O

____2__ C₆H₆ + _15__ O₂ -> _12__ CO₂ + _6__ H₂O

500

Balance the Equation 

CH₃CH₂CH₂CH₃ + O₂ ->CO₂ + H₂O

_2__ CH₃CH₂CH₂CH₃ + _13__ O₂ -> _8__ CO₂ + _10__ H₂O

Empirical Formula

100

What is the empirical formula of a compound that contains 0.783g of Carbon, 0.196g of Hydrogen and 0.521g of Oxygen?

C₂H₆O

200

What is empirical formula of a compound which consists of 89.14% Au and 10.80% of O?

Au₂O₃

300

What is empirical formula if compound consists of 21.2%N, 6.1%H, 24.2%S and 48.5% O?

N₂H₈SO₄

400

Empirical formula of a substance is CH₂O. Molar mass is 180. What is the molecular formula?

C₆H₁₂O₆

500

Sample (3.585g) contains 1.388g of C, 0.345g of H, 1.850g O and its molar mass is 62g. What is molecular formula of this substance?

C₂H₆O₂

Concentration & Dilutions

100

1.0 moles of potassium fluoride is dissolved to make 0.10 L of solution.

10.0 M

200

0.5 grams of sodium chloride is dissolved to make 0.05 liters of solution.

Because you have 0.0085 moles of NaCl in this solution, the total concentration is 0.17 M.

300

952 grams of ammonium carbonate are dissolved to make 1750 mL of solution.

5.67 M

400

If I have 340 mL of a 0.5 M NaBr solution, what will the concentration be if I add 560 mL more water to it?

0.19 M (the final volume is 900 mL)

500

If I dilute 250 mL of 0.10 M lithium acetate solution to a volume of 750 mL, what will the concentration of this solution be?

0.033 M (the final volume is 750 mL, set up the equation from that

Limiting Reagents

100

C3H8 + O2 -------> CO2 + H2O

a) If you start with 14.8 g of C3H8 and 3.44 g of O2, determine the limiting reagent

O₂

200

Consider the reaction I₂O₅(g) + 5 CO(g) -------> 5 CO₂(g) + I₂(g) a) 80.0 grams of iodine(V) oxide, I₂O₅, reacts with 28.0 grams of carbon monoxide, CO.

What is the limiting reagent.

CO is limiting reagent 

300

 Given the following equation:

A_l2O₃ + Fe ------> Fe₃O₄ + Al

a) If 25.4 g of Al2O3 is reacted with 10.2 g of Fe, determine the limiting reagent

Fe 

400

Nitric oxide (NO) reacts with oxygen gas to form nitrogen dioxide (NO2), a dark brown gas:

2NO(g) + O₂ → 2NO₂

In one experiment 0.866 mol of NO is mixed with 0.503 mol of O2. Determine the limiting reagent

NO

500

Consider the following reaction: 

When 3.22 moles of Al reacts with 4.96 moles of HBr

2 Al + 6 HBr → 2 AlBr₃ + 3 H₂

HBr