Unit 1
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
Name C4O3
Tetracarbon trioxide
What happens to a weak electrolyte when it is dissolved in a liquid?
It only partially dissociates
What is the name of H3PO4?
Phosphoric acid
How old am I
19
How many sig figs are in the number 0.00960?
3
Rank the following in order from smallest to largest Br, H, N, He, O, Cl
He, H, O, N, Cl, Br
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
What is the conjugate acid of HPO22-?
H2PO2-
How many siblings do I have?
2
What is 53,570 in scientific notation?
5.357*10^4
What is AsBr3 molecular shape?
Triagonal pyramidal
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
What is the pH of a solution if the H3O concentration is 4.0 * 10 -9 ?
8
How tall am I?
5' 5''
What is 17.9 degrees kelvin in Fahrenheit?
-427 degrees Fahrenheit
How many atoms of H20 can be prepared from 52.1 grams of MnO2?
MnO2 + HCl → MnCl2 + Cl2 + H2O
7.22*10^23
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
The pH of a popular soft drink is 3.4; what is its hydronium ion concentration?
3.9*10-4
What is my favorite subject in college?
Chemistry/ classics
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
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
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
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
What is my minor?
Chemistry