When the nucleus of an atom contains a constant number of protons but a variable number of neutrons, the atom is called a (n) ?

1) element

2) isotope

3) valence

4) dalton

The solution with the highest concentration is O 5.0 M o 1.0m 0.6 M 0.75 M

Mno2 + 4hcl = mncl2 + cl2 + 2h2o determine which reactant is excess

A gas company has the following rate schedule for natural gas usage in single-family residences: Monthly service charge $8.80 Per therm service charge 1st 25 therms $0.6686/therm Over 25 therms $0.

The substance that waves travel though? A - waves B - absorption C-medium D-sound waves E-transmission

Which of the following is likely to occur if more reactants are added to a reaction that is at chemical equilibrium?

Why are water storage tanks usually built on towers or hilltops?

What is convection cell

One example of a decomposition reaction is the electrolysis of water. the chemical reaction can be expressed by the equation 2 h2o →2 h2 o2. the reactant (s) of this chemical reaction is/are?

When the positive ion of one compound replaces the positive ion of another compound?

A 2.00 L container of gas has a pressure of 1.00 atm at 300 K. The temperature of the gas is halved to 150K, and the measured pressure of the same 2.00 Liter sample is 0.420 atm.