Question
17 FINAL-E g carbon dioxide is an example of A) a a com 10 What is the A) chemical formula for chromium I) sulfate? Cr2(SO4)3 B) an D) homogeneous mixture. a 11) Which of the foll A) Raising cause the volume of an gas to in value? ideal triple of 3. the temperature from 25 75 ring absolute perature by a factor of while 3 term D) Lowering the 3 while presure by a factor ERaising the absolute temperature the the absolute temperature by a factor temperature pressure. by a factor of 3 while 12) mass pressure by a factor of What in does 7.98 moles of Kr have? A) 422 g 13) Give the net ionic DO 480 Fe(NO32 equation for the reaction (if any) that occurs when aqueous solutions of K2s and 13) are mixed. 2 K E) No Determine the volume of H2s (at 375 K and 1.20 atm) needed to produce 550 gofs. Assume that there is excess SO2 present. 14) 14) A) 34.1 L 22.7 L D 293 L 15 Which of the following elements is a good conductor of heat and electricity? A) fluorine B) argon C) aluminum 15) D) carbon 16) container at 800 mm Hg? A) -114c 159°C A fixed amount of gas at 25.0°C occupiesa volume of 9.23 Lwhen the pressure is 629 torr. Use Charles's law to calculate the volume (L) the gas will occupy when the temperature is increased to 166°C while maintaining the pressure at 629 torr. A) 11.3 L redict the charge that the ion formed from iodine would have. E) 2+ A) 1+ B 4+ D) 2
Explanation / Answer
Question 9.
carbon dioxide, CO2, is an example of a compound, since it has 2 elements, therefore can't be an element, nor a mix
choose C
Q10.
For Chromium (III) = Cr+3
Sulfate = SO4-2
then 3x2 --> 2x3
Cr2(SO4)3
choose A
Q11
volume to triple --> either decrease in pressure, or increase in Temperature
a) false, since T must be in abs
b) false, this will have 3x3 effect
c) This is TRUE, decreas in 3x of P will increas 3x V
d) lowering T will lower V, ignore this option
e) false, 3x1/3 factor cancel each other
Q12.
MW of Kr = 83.798 g/mol
so
7.98 mol = 83.798*7.98 = 668.70804 g of Kr, choose E