What must occur in order for a gas-discharge lamp to produce light?

What do we call the process by which cells obtain the energy that they need?

Consider the balanced equation for the following reaction: 3CuO (s) + 2NH3 (g) → 3H2O (l) + 3Cu (s) + N2 (g) If CuO is present in excess, determine the amount of NH3 needed to produce 2.94 moles of H2O.

A positively charged ion will bond with what?

How many molecules are in. 25 mole of O2

Which situation is an indication that a chemical change has occurred? No color change occurs. A gas is formed. No heat is released. The temperature does not change.

Which of the following is a cost of recreational activities? A. Exercise B. Economic growth C. Noise D. Social interaction

There are three ways that heat can move from one place to another. Use examples pertaining to how heat is transferred from the sun to Earth and in the land, ocean, and atmosphere to explain all three.

What is temperature? A measure of the kinetic energy of a system. Energy of a system. How hot something is. A measure of density.

How many molecules of sodium nitrate are produced when 17 g of sodium azide, NaN3, react according to the following equation: NaN3 (aq) + AgNO3 (aq) - --> AgN3 (s) + NaNO3 (aq) Question options: 3.7x1023 1.6 x 1023 1.85x1023 6.02x1023

Which statement is true for the given reaction? Zn + PbSO4