Question

1 of root CHE 131 Chemical Principles FORMA TEST) AY 2017-18 By signing the prescere form. Ipletes that have eithe r authorized on this cam. For each question choose the best possible answer. 1. 1 g of hydrogen gas (H) occupies I La 298 K.1 g of nitrogen gas (N.) occupies 1 L 298 K. Which of the following is that (P = pressure) a) PP b) Pre Pec) Pe-Ped ) density of H, -density N ea&d 2. What is true about the relationship between volume and moles of a given gas? (constant and T) a) V:/ V/ b) they are directly proportional c) a graph of sv. V is linear d) c) a &c PURORE 3. The molar volume of a gas at a certain pressure and temperature is 18.80 L/mol. If its density is 3.776 g/L its molar mass is a) 4.98 g/mol b) 22.40 g/mol ) 70.99 g/mol )0.201 g/mol ) 15.02 g/mol 4. Knowing P, VT, and the pus constant R, and only these things about a gas, X, in a container, it is possible to determine what about this sample of gas? a) molar mass b) number of moles c) number of grams da& b e b &c 5. Which statement is true about the periodic table? The relative atomic massor dem. * Volume a) generally increases going left to right acros Tow b) increases going down a column generally increases going left to right across a period increases going down in a family e) all of the above 6. The majority of the elements in the periodic table are a) gases b) metals c) nonmetals d) metalloids e) alloys 7. The molar mass of Ca(NO) (in g/mol) is a) 164 b) 22.4 c) 70.1 d) 102 e) 6.02 x 10" 8.32 g of oxygen gas (O) at room temperature 00*0.015 rus y ) contains 0,5 mole of O, molecules NOS G00 b) 4 molat rowe) could make two moles of Co, molecules d)a& b e ) none of the above - 164.0881 8292/ 9. If there are the same number of argon atoms in one simple and the same number of carbon atoms in F 0049 another, then the value of the ratio, mass of the carbon sample/ the mass of argon sample would be a) 1.0 b) 3.3 0.30 d) 12 e) 40 39:941-Ar 100 VI 10. A compound of nitrogen and hydrogen is 87.50% nitrogen and 12.50% hydrogen by mas. Given only this information, you can determine that UNY a) the empirical formula is NH; b) the molecular formula is NH. NH, 024 c) its molar mass is 168 31.908 d) a& c ), b&c Ar 2.50 -3.32 2:00 11. Given the formulas KNO, Ca(NO.), and Al(NO), the combining ability of No, should be assigned a) 6-1 -2 d)-3 c) +2 mous as
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Answer 1

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