Regents Chem Review

Question 1

Which unit can be used to express solution concentration?

Accepted Answer

mol/L

Question 2

Which formula represents an alkene?

Accepted Answer

C3H6

Question 3

Sodium atoms, potassium atoms and cesium atoms have the same

Accepted Answer

oxidation state

Question 4

Which equation shows a conservation of atoms?

Accepted Answer

2H2 + O2 -----> 2H2O

Question 5

Which list of nuclear emissions is arranged in order from least penetrating power to the most?

Accepted Answer

alpha particle, beta particle, gamma ray

Question 6

What is benefit of nuclear fission?

Accepted Answer

production of energy

Question 7

Which atom in the ground state has a partially filled second electron shell?

Accepted Answer

lithium atom

Question 8

Given the equation at equilibrium, H2O(g) <---> H2O(l). At what temperature does this exist?

Accepted Answer

100oC

Question 9

What is the total charge of the nucleus of a nitrogen atom?

Accepted Answer

+7

Question 10

Which term refers to the diff between the potential energy of the products and P.E. of reactant

Accepted Answer

heat of reaction

Question 11

The mass of 12 protons is approximately equal to

Accepted Answer

12 atomic mass units

Question 12

Which quality identifies an element?

Accepted Answer

atomic number

Question 13

As water is added to a 0.10 M NaCl aqueous solution, the conductivity of the resulting solution

Accepted Answer

decreases because the concentration of ions decreases

Question 14

A solid substance is an excellent conductor of electricity. The chemical bonds are most likely?

Accepted Answer

metallic, because the valence electrons are mobile

Question 15

Which barium salt is insoluble in water?

Accepted Answer

BaCO3

Question 16

Which compound releases hydroxide ions in an aqueous solution?

Accepted Answer

KOH

Question 17

Which substance can be broken down by a chemical change?

Accepted Answer

hexane

Question 18

Which reaction converts an atom of one element to an atom of another element?

Accepted Answer

transmutation

Question 19

Which two radioisotopes have the same decay mode?

Accepted Answer

37Ca and 53Fe

Question 20

Which substance is an Arrhenius acid?

Accepted Answer

H3PO4

Question 21

Which energy conversion occurs in a voltaic cell?

Accepted Answer

chemical energy to electrical energy

Question 22

Which nuclear emission has the greatest mass?

Accepted Answer

alpha particle

Question 23

Under which conditions of temperature and pressure is a gas most soluble in water?

Accepted Answer

low temp and high pressure

Question 24

Magnesium nitrate contains bonds that are

Accepted Answer

both covalent and ionic

Question 25

In a redox reaction, the total number of electrons lost is

Accepted Answer

equal to the total number of electrons gained

Question 26

Which term indicates how strongly an atom attracts the electron in a chemical bond?

Accepted Answer

electronegativity

Question 27

Which element has the greatest density at STP?

Accepted Answer

copper

Question 28

Which metal is more active than Ni and less active than Zn?

Accepted Answer

Cr

Regents Chem Review

Questions 28

Regents Chem Review

Questions 28