Answer:
C) 100 kPa
The total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of each individual gas. In this case, the partial pressure of the first gas is 70 kPa and the partial pressure of the second gas is 30 kPa. Therefore, the total pressure exerted by the mixture is 70 kPa + 30 kPa = 100 kPa. The answer is C) 100 kPa.
Step-by-step explanation: