1.02 g of hydrogen gas occupies 22.428 L. Although the volume of the gas Contain
ID: 523058 • Letter: 1
Question
1.02 g of hydrogen gas occupies 22.428 L. Although the volume of the gas Contain ____ significant digits the density of the gas (2.02 g/22.428 L = 0.0900659 g/L) should be reported as: Which of the following is greatest? a. 0.210 kg b. 102.0 cg c. 1.200 g d. 2000 mg e. 2000,000 Mg You must know the characteristic property of a substance? You must define a physical change and give examples. How do we know that air is a mixture and not a compound? How many grams of oxygen would combine with 6.0 g of sulfur to form the compound sulfur dioxide? Suppose we have 300 g of each of the following substances. Which sample contain the greatest number of moles (F.W = Formula Weight) a. HCl, F.W.=36.5 b. H_2O, F.W.=18.0 c. MgC0_3 F.W. = 84.3 d. CO_2 F.W. = 44 e. NaCl, F.W. = 58.4Explanation / Answer
5) Although the volume of gas contain 5 significant digits the
Density = Mass/ Volume = 2.02/22.428 = 0.0900659 g/L will be reported as 0.09 g/L
6) E is the greatest since it is mega grams.
7) Density
8) Physical change - Change in the form of the substance, change in its physical state. Example water
10) S + O2 = SO2
moles of S = 6/32 = 0.1875 moles
moles of O2 = 0.1875
Grams of O2 = .1875*32 = 6 grams
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