When there are more electrons than protons an object has an overall

charge.

Why is this reaction considered to be exothermic? a Because energy difference A is greater than energy difference C. b Because energy difference A and energy difference C are about equal.

Avogadro's number is equal to ?

How many particles are in 3.2 moles of oxygen?

Is the periodic table of the elements all of the atoms known to exist?

H2 (g) + Cl2 (g) →2HCl (g) As the pressure increases at constant temperature, the number of moles of HCl? Increase, Decrease, Stay the same?

An 80 kg volleyball player lands from a jump and tries to stop her forward motion. The normal contact force exerted by the floor on her shoes is 2000 N. The friction force exerted by the floor on her shoes is 600 N acting backward on the player.

How does electronegativity affect the polarity of the bond between two atoms?

How much heat (energy) would need to be absorbed by 1.5 g of liquid water to cause a temperature change of 30.45 °C? The specific heat of water is 4.18 J/gºC.

What happens when electrons are passed from one atom to a more electronegative atom?

Calculate the k sp for zinc hydroxide if the solubility of zn (oh) 2 in pure water is 2.1 * 10-4 g/l. calculate the k sp for zinc hydroxide if the solubility of zn (oh) 2 in pure water is 2.1 * 10-4 g/l. 2.9 * 10-3 1.5 * 10-3 9.9 * 10-18 3.8 * 10-17