chem

Question 1

What is density

Answer 1

Mass over volume

Question 2

What is a molecular formula

Answer 2

It is the formula that is giving details exact number of atoms and which atoms are in a molecule

Question 3

What is it the empirical formula

Answer 3

It gives the smallest whole number ratio of the molecular formula

Question 4

What is ammonium

Answer 4

NH4+

Question 5

What is hydronium

Answer 5

H30+

Question 6

What is Acetate

Answer 6

ch3CO2-

Question 7

What is bicarbonate

Answer 7

HCO3-

Question 8

What is cyanide

Answer 8

CN-

Question 9

What is hydroxide

Answer 9

OH-

Question 10

What is nitrate

what is nitrite

Answer 10

NO3-

NO2-

Question 11

What is perchlorate

Answer 11

ClO4-

Question 12

What is carbonate

Answer 12

CO3-

Question 13

What is sulfate

what is sulfite

Answer 13

SO4 -2

SO3 -2

Question 14

What is phosphate

Answer 14

PO4 -3

Question 15

What is formula weight

Answer 15

It is the molecular weight which is the weight of all the items added together in a particular molecule

Question 16

What is AMU

Answer 16

It is the weight of each isotope as listed on the periodic table for the elements

Question 17

What does a mole do

Answer 17

It links grams to atomic mass unit

Question 18

What is Avogadro’s number

Answer 18

It is 6.02×10^23 molecules

Question 19

What does Avogadro’s number tell us

Answer 19

It tells us the number of molecules in 1 AMU

Question 20

What does percent composition by mass Tell us

Answer 20

It tells us the percent of each element in a particular molecule

Question 21

What is molarity

Answer 21

It is moles of solute / liters of solution

Question 22

What is the mole fraction

Answer 22

It tells the number of moles of a particular substance divided by the total mass

Question 23

What is the smallest unit in a molecule

Answer 23

Atom

Question 24

What are the three parts of an atom

Answer 24

The protons and neutrons electrons

Question 25

What are the charges of the three parts of the nucleus

Answer 25

Proton has a positive one charge

the neutron has no charge

electron has a minus one charge

Question 26

What is Z

Answer 26

It is the atomic number or the number of protons

Question 27

What is the atomic weight

Answer 27

It is an average weight of all of the isotopes in AMU of the element

Question 28

What holds the proton and neutrons in the nucleus

Answer 28

The strong nuclear force

Question 29

What holds the electrons within the circle of the nucleus

Answer 29

The electrostatic our interactions with the positive charged protons

Question 30

What is an unstable nuclei

Answer 30

It is radioactive

Question 31

What does radioactive decay do

Answer 31

It makes unstable nuclei undergo a transformation to make them more stable by altering the number in ratio of protons and neutrons or decreasing the energy of the molecules

Question 32

What are the three types of radioactive decay

Answer 32

Alpha Beta Gamma

Question 33

What happens in alpha decay

Answer 33

An element gives off a helium Adams or for math unit two atomic number units to stabilize the element

it causes a decrease in the neutron number and the Z or the proton number

Question 34

What are the three types of beta decay

Answer 34

There is beta minus

beta plus or positron a mission

electron capture

Question 35

What happens in beta minus decay

Answer 35

A proton is added to the apparent element and then a beta minus one is injected to balance this out

this happens when there are too many neutrons

there will be a decrease in the number of neutrons and an increase in the number of protons