Finals Semester 1

Question 0

Filtration

Answer 0

is a way to separate out pure substances in a mixture comprised of particles, some of which are large enough to be stopped by porous material.

Question 1

Distillation

Answer 1

is a way of separating a mixture comprised of 2 or more liquids.

Question 2

Evaporation

Answer 2

is a way to separate mixtures where there are one or more dissolved solids.

Question 3

What would you do to separate sand from water

Answer 3

I would either use filteration or just boil off the water

Question 4

Law of conservation of mass

Answer 4

During a chemical reaction the mass the total mass of the product must equal the total mass of the reactants.

Question 5

Parts of daltons theory

Answer 5

1. All matter is composed of tiny particles called atoms,
2. Atoms of the same element are identical in terms of size, mass, and other properties.
3. Atoms of different elements can chemically combine with one another to form chemical compounds
4. Chemical reactions can be described as the separation, combination, or rearrangement of atoms.
   Dalton Thompson, Rutherford

Question 6

Law of definite proportions

Answer 6

which states that a given chemical compound always contains the same elements in the exact same proportions by mass

Question 7

What did dalton do

Answer 7

formulated an atomic theory based on the law of conservation of mass, the law of definite proportions, and the law of multiple proportions.

Question 8

What did Thompson do

Answer 8

He used the code ray tube to discover electrons and that they have a negative charge.

Question 9

What did Rutherford do

Answer 9

He used the gold foil Experiment to discover the nucleus

Question 10

Elements of the same group have

Answer 10

Similar properties

Question 11

Naming prefixes for molecular compounds

Answer 11

1-mono
2-di
3-tri
4-tetra
5-pent
6-hexa
7-hepta
8-octa
9-nona
10-deca

Question 12

Naming binary acids steps

Answer 12

Step 1: write hydro-
Step 2: use the root of the anions name with an ic ending.
Step 2.5: write acid. Don’t worry about little numbers.
Step3 stop writing.

Question 13

Naming oxy acids

Answer 13

has oxygen in them.
Step 1. Don't write hydro.
Step 2.  Use the root of the anion with these endings. 
Ate.➡️Ic
Ite.➡️Ous 
Step 2.7 write acid
Step 3 don't write anymore

Question 14

Mole to mole steps

Answer 14

1. Balance the equation
2. Put the variable and given mass in moles over the coefficient
   3.

Question 15

Mass to mass steps

Answer 15

1. Balance the equations
2. Put the variable and given mass over the the mass of the compounds.
3. Cross multiply,
4. Stop writing

Question 16

Empirical formula

Answer 16

Step 1. Change the % to mass
Step 2 put the mass over the molar mass
Step 3. Solve 
Step 4 devide by smallest one
Step 5: multiply until whole

Question 17

Molecular formula steps

Answer 17

1. Get the mass of the empirical formula.
2. Put the formula mass ( given) over the empirical mass
3. Multiply the empirical formulas coefficients by the answer