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raketka [301]
3 years ago
12

Use the periodic table to calculate the molar mass of each of the following compounds. Give your answer to the correct number of

significant figures.
Iron(III) oxide (Fe2O3): g/mol
Chemistry
1 answer:
Anna [14]3 years ago
7 0
Fe: 2 x 55.845 = 111.69
O: 3 x 15.9994= 47.9982

111.69 + 47.9982 = 159.69 g/mol
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A student wants to remove the salt from a mixture of sand and salt in order to get only pure sand. He adds water to the mixture.
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Explanation:

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What volume (in liters) does 3.91 moles of nitrogen gas at 5.35 atm and 323 K occupy
daser333 [38]
Moles   =  n  = 3.91 mol

                  Pressure  =  P  =  5.35 atm

                  Temperature  =  T  =  323 K

                  Volume  =  V  =  ?

Formula used: Ideal Gas Equation is used,

                                        P V  = n R  T
Solving for V,
                                           V  =  n R T / P
Putting Values,
                           V  =  (3.91 mol × 0.0825 atm.L.mol⁻¹.K⁻¹ × 323 K) ÷ 5.35 atm

                         V  =  19.36 L

5 0
3 years ago
"You have a solution of glucose in water that has a concentration of 2.50 M and a volume of 0.442 liters. You dilute this soluti
taurus [48]

Answer:

0.737M

Explanation:

C1V1=C2V2

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C = 1.105/1.5

C = 0.737M

7 0
3 years ago
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