Chem test 4

The volume of gas with a pressure of 1.2 atm increases from 1.0 L to 4.0 L. What is the final pressure of gas, assuming no chance in moles or temperature?

0.30 atm

What is the Coefficients for this reaction: N2H4 + H202 ---> N2 + H2O

1, 2, 1, 4

What is the coefficient for Aluminum chloride when balanced correctly? Al + Cl2 ----> AlCl3

2

Which is the balanced equation for K3PO4 + Ca(NO3)2 ---> Ca3(PO4)2 + KNO3 ?

2 K3PO4 + 3 Ca(NO3)2 ----> Ca3(PO4)2 + 6 KNO3

How many molecules of water, H2O, are present in 75.0 g of H2O?

2.51 x 10^24 molecules

How many particles does One mole of any substance contain?

6.02 x 10^23

What is the molar mass of Calcium hydroxide, Ca(OH)?

74.1 g

What is the oxidized and what is reduced in this reaction? 2Al(s) + 3Br2 (g) -----> 2AlBr3 (s)

Al is oxidized and Br is reduced

What type of reaction is when two or more elements or compounds form one product?

Combination

The following reaction takes place when an electric current is passed through water. What type of reaction in this example? 2 H2O ----> 2 H2 + O2

Decomposition

What is the reaction that absorbs 150 kcal of energy?

Endothermic Reax

What is the mathematical expression of the ideal gas law?

PV = nRT

What is the Classification for this unbalanced reaction? Fe + HCl ----> FeCl3 + H2

Single replacement

What is the force of gas particles against the walls of a container called?

pressure

In any balanced chemical equation, what is the number of each type of atom on both sides of the equation?

the same

What unit of temperature is used in gas law calculations?

Kelvin