What kind of elements are columns 1,2 and 13-18 on the periodic table?

What are all planets that have rings

Acrylonitrile (C3H3N) is the starting material for many synthetic carpets and fabrics. 15.0 g C3H6, 10.0 g O2, and 5.00 g NH3 are reacted to produce acrylonitrile and water.

Where are the protons in an atom located? a. Outside the nucleus b. As far away from the neutrons as possible c. We can't know since the protons are in constant motion d. In the very center of the atom, on the average e. Near the electrons

Which country contributes the most green house gases to earth'satmosphere?

Leslie is observing the air in a balloon. She wants to know if the air in the balloon is matter. What must be true of the air for it to be matter?

When two substances go through a chemical change what happens A, They always turn into gases B, Their physical properties remain the same C, their molecules remain the same D, They form a new substance with different properties

Which carbohydrate strengthens plant cells?

F a bouncing ball has a total energy of 20 J and a kinetic energy of 5 J, the ball's potential energy isJ. If the kinetic energy of the ball decreases, then the potential energy will.

Assuming that each cubic centimeter of water has a mass of exactly 1 g, find the mass of 1.27 cubic meter of water.

Using the following thermochemical data, what is the change in enthalpy for the following reaction? Ca (OH) 2 (aq) + 2HCl (aq) → CaCl2 (aq) + 2H2O (l) CaO (s) + 2HCl (aq) →CaCl2 (aq) + H2O (l), ΔH = - 186kJ CaO (s) + H2O (l) →Ca (OH) 2 (aq), ΔH =