Which substance can not be decomposed by a chemical change?

(1) AlCl3 (3) HI

(2) H2O (4) Cu

What is electron affinity? A. the energy change that happens when a neutral atom gains an electron B. the energy change that happens when a neutral atom loses 2 electrons C.

There are different types of bonds based on electronegativity. One bond type is known as non-polar covalent. Which choice below has this bond type? A. all of the compounds B. H2 C. H2O D. NaCl

At which temperature and pressure will a sample of neon gas behave most like an ideal gas? A) 300. K and 2.0 atm B) 300. K and 4.0 atm C) 500. K and 2.0 atm D) 500. K and 4.0 atm

If you only have 5.25mol of Copper and excess AgNO3, how many moles of silver can be produced?

The process of converting nitrate to nitrogen gas and nitrous oxide is called

A fog over a lake. what two changes of state must occur to produce the fog? do the water molecules absorb or release energy during these changes of state? what happens to the motion of the water molecules as a result?

Limes have a [H3O+] of 1.3 x 10-2 mol/L. Their pOH is

The human body is 0.0040% iron. How many milligrams of iron does a 165 pound person contain?

Which of the following is the correct Lewis structure for ammonia (NH3) ? Note: Hydrogen and nitrogen have one and five valence electrons respectively.

Which of the following statements is true? A. Particles of a solid have a very orderly, three dimensional arrangement and do not move B. Particles of a liquid change shape and volume C.