Unit 1
Unit 2
Unit 3
Unit 4
Random
100
The gold foil experiments of the early 1900's gives what three descriptions about the atom?
What is: Atoms have small, dense, positively charged nuclei.
100
Which formula contains a polyatomic ion?
K2S AlBr3 Al2O3 KCN
What is KCN
100
What is the empirical formula for hexane? C6H14
What is C3H7
100
In the following reversible reaction, water acts as an:
NH4 (aq) + OH2 (aq) Yields NH3(aq) + H2O(l)
What is an acid
100
What type of reaction is this?
Single Replacement / Substitution
200
According to the electron cloud model, what term is the most probable location of an electron in an atom?
What is Orbital
200
What information about C4H10 can be determined from its structural formula, but not determined from its molecular formula?
What is arrangement of atoms
200
Calculate the formula mass of C9H11N2O2?
What is 163 g/mol
200
Which Molarity (M) solution is the best conductor of electricity?
What is highest concentration of ions
200
Which equation represents beta decay?
What is 1
300
What change in energy occurs when an electron returns from a higher energy state to a lower energy state?
What is: energy is emitted.
300
What do the coefficients in a balanced chemical equation indicate about the substances in the equation?
What is mole ratios
300
Given a balanced equation representing a reaction:
2CO(g) + O2(g) → 2CO2(g) + energy
Which mass of O2(g) reacts completely with 5.6 grams of CO(g) to produce 8.8 grams of CO2(g)?
What is 3.2 g
300
Describe the heat transfer in this system:
A person with a body temperature of 40°C holds a cup of hot water in their hand. The temperature of the cup is 54°C. The air temperature is 2°C.
What is heat transfers from the cup to the hand to the air.
300
Nature favors an increase or decrease in energy and an increase or decrease in entropy?
What is decrease in energy and increase in entropy
400
What is the definition of an isotope of an element?
What is: same number of protons but a different number of neutrons
400
How many bond are there in N2?
What is triple bond
400
When 6.0 moles of electrons are gained by iodine, how many moles of electrons are lost by fluorine?
6KF + I6 → 6KI + F6
What is 6. Matter is not created nor destroyed, what is lost must be gained.
400
Which compound is an Arrhenius base?
NaCl Ca(OH)2 KNO3 H2SO4
What is Ca(OH)2
400
In terms of kinetic and potential energy what is happening with this cooling curve?
What is Kinetic Energy is constant, Potential Energy decreases
500
What type of nuclear reactions do these equations represent?
What is: Equation A is fusion, Equation B is fission
500
Name a super common molecule with an asymmetrical distribution of charge?
What is H2O
500
Forces of attraction between water molecules is known as?
What is hydrogen bonding
500
A solution has a mass of 5000 grams and contains 0.075 grams of dissolved solute.
What is the concentration in parts per million of this solution?
What is 15 ppm
500
Which phase change results in an increase in disorder?
Sublimination - solid to gas