PLUS

Unit 1

100

How many protons, neutrons, and electrons are in a stable atom of Cl if the atomic mass is 36 amu?

P=17, E= 17, N=19

200

How many sig figs are in the number 0.00960?

3

300

What is 53,570 in scientific notation?

5.357*10^4

400

What is 17.9 degrees kelvin in Fahrenheit?

-427 degrees Fahrenheit

500

What is the mass of a sample of Nickel, which completely melts after 3120 J of heat? (∆Hfus of nickel is 298 J/g)

10.5 g

Unit 2

100

Name C4O3

Tetracarbon trioxide

200

Rank the following in order from smallest to largest Br, H, N, He, O, Cl

He, H, O, N, Cl, Br

300

What is AsBr3 molecular shape?

Triagonal pyramidal

400

How many atoms of H20 can be prepared from 52.1 grams of MnO2?

MnO2 + HCl → MnCl2 + Cl2 + H2O

7.22*10^23

500

At a very high temperature, manganese is isolated from its ore, manganomanganic oxide, via the following balanced equation: 3 Mn3O4(s) + 8 Al(s) 4 Al2O3(s) +9Mn(s) How many manganese atoms are liberated if 54.8 moles of Mn3O4 react with excess aluminum

164.4 mol Mn

Unit 3

100

What happens to a weak electrolyte when it is dissolved in a liquid?

It only partially dissociates

200

How can you tell when a chemical reaction reaches equilibrium?

The rate of the forward reaction is equal to the rate of the reverse
reaction

300

Consider the reaction Mg2Si(s) + 4H20(l) --> 2Mg (OH)2(aq) + SiH4(g) Which of the reactants is in excess if we start with 50.0 g of each reactant?

 H2O is in excess

400

A gas balloon has a volume of 106.0 liters when the temperature is 45.0 °C and the pressure is 740.0 mm of mercury. What will its volume be at 20.0 °C and 780.0 mm of mercury pressure?

93.5

500

Does a precipitate form if potassium bromide reacts with barium chloride? If so, name the precipitate and write the net ionic equation

There is no precipitate so no net ionic equation

Unit 4

100

What is the name of H₃PO₄?

Phosphoric acid

200

What is the conjugate acid of HPO₂^2-?

H₂PO₂^-

300

What is the pH of a solution if the H₃O concentration is 4.0 * 10 ^-9 ?

8

400

The pH of a popular soft drink is 3.4; what is its hydronium ion concentration?

3.9*10^-4

500

What is the hydronium ion concentration of a 0.20 M solution of ammonia? The Kb value for ammonia is 1.8 × 10^–5

5.2 × 10^–12

Chelsey

100

How old am I

19

200

How many siblings do I have?

2

300

How tall am I?

5' 5''

400

What is my favorite subject in college?

Chemistry/ classics

500

What is my minor?

Chemistry