The mass of an electron is 9.11 10-28

g. what is the mass of a mole of electrons?

Why is the first ionization energy of a nonmetal much higher than that of an alkali metal

What volume of product is produced when 20.0 Mg of liquid hydrogen reacts with excess liquid oxygen in a rocket propellant reaction? Gas is formed 101.3 to 5 kPa and 40.0 °C

What is the molar mass of the following substance : Cs2CO3

What is its molar heat of vaporization in kilojoules per mole if its vapor pressure at 20°C is 11.0 torr?

1. What is an air mass? 1. a large body of air with the same temperature and moisture. 2. any kind of cloud that produces rain, sleet, snow, or hail. 3. a place where weather always changes in an extreme way.

How does heat transfer takes place between any two systems?

Hydrate name of CaCl2 * 8 H2O

Calculate the heat evolved from a mixture of 14.1 l of sulfure dioxide

Which stament best describes a solution

Which answer accurately describes the difference between speed and velocity? Read each answer choice carefully. Question 4 options: A. If speed is constant, then velocity is also constant. B. Speed requires direction.