18) When solid blue copper(I) sulfate pentahydrate is heated in a test tube what

Question

18) When solid blue copper(I) sulfate pentahydrate is heated in a test tube what products are formed? A) Culs), H20(2), H2S04(aq) B) Cu(OH)2(s), H2Ote) C) CuSO4(s), H2O(R) D) CuO(s), H2SO4(a) E) CuSO4(s), H2(g), H20(2) 19) A square prism measures 2.74 cm along one edge of the square face and 10.53 cm in length. What is the best way to report the volume of the square prism to the correct number of significant figures knowing that the volume of a square prism, is V= x21 A) 79.06 cm3 B) 79.1 cm3 C) 79 cm3 D) 79.055028 cm3 E) 7.9 X 101 cm3 20) Calculate the change in enthalpy, aH for the following reaction NaOH(aq) + HCI(aq) Naci(aq) + H2O(R) given the data NaOH(s) NaOH(aq); He-46.8 kJ NaOH(s) + 1 ICI(aq) ' Naci(aq) + H20(1); He-970 kJ A) +50.2 k) C) +46.8 k) D)-468 kJ E)-147.2 k B)-50.2 k 21) 12.0 L of Krypton gas at 101 kPa and 2xdnto a 4500 L tank at the same temperature, what is the pressure of Krypton in the tank? A) 5.6 kPa D)L1x10%kPa 45X104 kPa B) 18X 103 kPa 73x 101 kPa A-3

Explanation / Answer

18)

on heating water will be separated out of CuSO4.5H2O

So, the product will be C

Answer: C

19)

x = length of square face = 2.74 cm

l = 10.53 cm

V = x^2*l

= (2.74 cm)^2 * (10.53 cm)

= 79.06 cm^3

Answer: A

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