11. For the following reaction, tell whether these changes will cause a shift to the right (R), a shift to the left (L) or no change (NC) (6 pts total) CO(g) + NO2(g) ⇌ CO2(g) + NO(g)
a) increase volume
b) decrease temperature
c) decrease [CO2]
d) add an inhibitor
e) increase
[NO2] ∆H = +48.5 kJ
12. For the following reaction, tell whether these changes will cause a shift to the right (R), a shift to the left (L) or no change (NC) (6 pts total) BaCl2(aq) + Na2(SO4)(aq) ⇌ Ba(SO4)(aq) + NaCl(s)
a) increase temperature
b) increase [NaCl]
c) decrease [Na2(SO4)]
d) raise the pressure
e) increase [BaCl2]

ANSWER:

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hey there!

boiling point is the temperature at which the vapor pressure of the liquid equals atmospheric pressure. the vapor pressure of solvent molecules is decreased when a solute is added, so a higher temperature is required to increase the number of solvent molecules in the gas phase above the liquid.

at the freezing point, the vapor pressures of the solid and liquid are equal; a lower temperature is needed to reduce the number of solvent particles above the liquid.

hope this you

tobey

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3