Which number most likely represents the first ionization energy, in kilocalories per mole of atoms, for a nonmetallic element?

1.96

2.138

3.194

4.239

Find the molecular formula of a compound that contains 30.45% nitrogen and 69.55% oxygen. The molar mass of the compound is 92.02 g/mol

What is 0.00996 written in scientific notation

Calcium hydride reacts with water to form calcium hydroxide (aqueous) and hydrogen gas. part a write a balanced chemical equation for the reaction.

What will 3.20 moles of o2 occupy at stp

What is the sign of △S for each of the following processes? I. The separation of gaseous molecules of UF6, into 238UF6 and 235UF6 at constant temperature and pressure. II. The dissolving of I2 (s) in CCl4 (l).

Which of the following is not a source of air pollution related to human activities

You see rainforests a is far as the eye can see It rains every day and the humidity is fiercel Where might you be? Polar climate Tropical climate Subtropical climate Temperate climate

2. A balloon is dunked into a tank of cold water. How will this affect the size of the balloon?

Which of the following correctly describes a compound?

If the [H+] of a solution is 1.0 x 10 to the power of - 2 mol/L the pH is: (pH = - log (H+] 1 12 -2 2 chemistry