A mixture of n2, o2 and he have mole fractions of 0.25, 0.65, and 0.10, respectively. what is the pressure of n2 if the total pressure of the mixture is 3.9 atm?

A pH of 15.0 a. is not possible. b. is a base. c. is an acid. d. is a neutral.

Why leather gets hardered after tanning

What happens to the individual molecules of a liquid as they gain enough kinetic energy to escape the surface of the liquid? A. They condense B. They boil. C. They evaporate D. They freeze

Convert the given quantities. Give your answer with the appropriate number of significant figures. Convert 6g/cm^3 to kg/m^3. Convert 50 °F to °C. Convert 4.3 into meters.

Arrange these 3 reactions according to increasing DS. (1) CH4 (g) H2O (g) - -> CO (g) 3 H2 (g) (2) C (s) O2 (g) - -> CO2 (g) (3) H2O2 (l) - -> H2O (l) 1/2 O2 (g) 1 < 3 < 2 2 < 3 < 1 2 < 1 < 3 3 < 2 < 1 3 < 1 < 2

Jenny and anne wanted to see who could throw the ball the hardest. they decided to each throw a ball against the wall as hard as they could and measured how far the ball rolled away from the wall. what might be the variables in this experiment;

Is calcium carbonate chemical change?

The mass number of an element is the sum of the number of

Balance the following reaction. CH4+O2==>CO2+H20

Why do you think crime scenes involving homemade bombs have increased?