math problems chem

Mixture of He, No, and Ar has a pressure of 12.4 atm. The partial pressure of He is 461 pressure of Ar is 233 kPa. Calculate the partial pressure of N2 in atm.

5.55 atm

Express 364 torr as atm

0.479

A twinkie snack cake contains 150 calories of energy. Convert this value to joules

630J

A 50.0 g sample of an unknown substance, initially at 20.2 °C, was heated with 1.55 kJ of energy. The final temperature of the substance was 125.0 °C. Determine the specific heat of this substance

0.296 J/g°C

Estimate the heat energy required to raise the temperature of 5.0g of ice by 5.0C. The specific heat od is approximately 2 K/g°C

50J

Determine temperature change when 5.15 kJ of heat is added to 250.0 g of water.

4.92°C

Determine the final temperature after 25.0 kJ of energy is added to 500.0 g of water initially at 21.5 °C.

33.5°C

Calculate the final volume when the pressure of 200mL sample of gas changes from 2.0 atm to 1.0 atm at constant temperature

400mL

Calculate the final volume when the pressure of 200mL sample of gas changes from 2.0 atm to 1.0 atm at constant temperature

400mL

What pressure is exerted by 129.5 g of CH4 in a 0.3900L steel container at 215.7K?

366.4atm

Calculate the wavelength of light that corresponds to a frequency of 2.30x10^12 per second. Report your answer in units of centimeters.

0.01304