What element has 8 valence electrons

Suppose that a 100 mL sample of ideal gas is held in a piston-cylinder apparatus. Its volume could be increased to 200 mL by: a. increasing the temperature from 25oC to 50oC at constant pressure. b. increasing the pressure from 1.00 atm to 2.

A vessel of volume 22.4 dm3 contains 2.0 mol h2 and 1.0 mol n2 at 273.15 k initially. all the h2 reacted with sufficient n2 to form nh3. calculate the partial pressures and the total pressure of the final mixture.

Consider equimolar samples of different ideal gases at the same volume and temperature. gas a has a higher molar mass than gas b

During the light-independent reaction, carbon dioxide is fixed by adding it to a A. 2-carbon compound B. 3-carbon compound C. 4-carbon compound D. 5-carbon compound

An effective collision between reactant particles requires the particles to have the proper what?

Which molecule is a source of energy, a store of energy, and can mix with water?

How many atoms will you find in 2.0 moles of he?

An atom of nitrogen has seven electrons. Which diagram correctly respresents the arrangement of these electrons?

A farmer has concerns about the nitrogen levels in her soils. What can she do to ensure that the nitrogen bacteria are replenished in the soil? Question 6 options: Clear cut the area surrounding the field.

The changing of gas to liquid