Show:
Have
Fun
Cramming
For This
Exam
100
How many protons and electrons are in a 64 Cu 2+ Ion?
What is: 29 protons, 27 electrons
100
What is the volume of 2.00 moles of Nitrogen gas (N2) at STP?
What is: 44.8 L
100
What type of chemical reaction is represented by this balanced equation? S8 (s) + 8O2 (g) => 8SO2 (g)
What is: Synthesis
100
What is the correct chemical formula for sodium sulfate?
What is: Na2SO4
100
The half-life of phosphorus-32 is 14.3 days. How much of a sample of phosphorus-32 will remain after 57.2 days?
What is: 1/16 T 1/2= 14.3 days TT= 57.2 days 57.2/14.3= 4 half lives
200
What is the name of the compound with the chemical formula CrCl3?
What is: Chromium (III) chloride
200
According to this balanced chemical equation, what volume of C2H2 is required to form 40.0 L of CO2?
What is: 20.0 L
200
Which chemical equation is balanced? A) LiOH + CO2 => Li2CO3 + H2O B) 2LiOH + CO2 => Li2CO3 + H2O C) LiOH + 3CO2 => Li2CO3 + H2O D) 4LiOH + CO2 => LiCO3 + 2H2O
What is: B) 2LiOH + CO2 => Li2CO3 + H2O
200
Which element is located in Group 2 (IIA) and Period 6 of the periodic table?
What is: Barium (Ba)
200
What type of chemical reaction is represented by the equation? 2C4H10 + 13O2 => 8CO2 + 10H2O
What is: Combustion
300
If two oxygen atoms combine to make a molecule, what type of bond will they form?
What is: A double covalent bond
300
In an experiment, 2.62 g of iron react completely with 1.50 g of sulfur. What is the empirical formula for the compound produced?
What is: FeS
300
Neutralization occurs when 15.0 mL of KOH react with 25.0 mL of HNO3. If the molarity of HNO3 is .750 M, what is the molarity of KOH?
What is: 1.25 M (.025L)(.75M)=(.015L)(Mb)
300
Which is a characteristic of a strong acid?
What is: It completely ionizes in solution.
300
Explain why the addition of a solute DECREASES the melting point of a liquid.
What is: Intermolecular forces become less strong & are interrupted by the solute.
400
Why did most of the alpha particles go straight through the gold foil in Rutherford's experiment?
What is: Most of an atom is empty space
400
What do the ions K+, Ca^2+, and Cl^- have in common?
What is They have the same electron configuration as argon.
400
Which substance can act as either an acid or base according to the Brønsted-Lowry definition?
What is: HOH
400
Which ones of these compounds is soluble in water? A) Aluminum sulfide B) Calcium carbonate C) Iron (III) hydroxide D) Potassium sulfate
What is: C)Iron (III) hydroxide OR D)Potassium sulfate
400
It has been observed with one variety of paint that the rate of paint drying can be drastically increased by adding a small amount of "accelerant". Based on what you know of catalysts, is it reasonable to think of this accelerant as being a catalyst?
What is: No, because the accelerant is used up during the reaction. Catalysts aren't part of the reaction.
500
How does an S^2- ion differ from an electrically neutral sulfur atom?
What is Number of electrons
500
When 42/19 K undergoes radioactive decay, the result is two products, one of which is calcium-42. What is the other product?
What is: 0/-1 e
500
What is the oxidation number of sulfur in BaSO4?
What is: +6
500
In which block does an element with the electron configuration [Xe] 6s^2 4f^14 5d^10 6p^1 belong?
What is: P block
500
The equation A + B => C + D is first order in A and first order in B. If the rate constant for this reaction is 3,450/M.sec, what will the rate of this reaction be when the concentration of A is 0.50 M and the concentration of B is 0.25 M?
What is: Rate= 431.25 rate= (.5M)(.25M)(3450/Msec)