Final

Question 1

What are Sig figs addition and subtraction
10.44 + .03121

Answer 1

Lowest Sigg fig after the decimal round to nearest 10th
10.45

Question 2

Sig fig rules
4.0
0.082
4.200

Answer 2

4.0 2 sig fig
0.082 2 sig fig
4.200 4 sig fig

Question 3

What are the sig figs Mult and Division
10.2000 / 2.0

Answer 3

Lowest of SMALLEST TOTAL SIG FIG
Ans has 2 sig fig

Question 4

Electron configuration

Answer 4

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶

Question 5

What is the difference between ionic and covalent bonds?

Answer 5

Ionic bond is a metal and nonmetal covalent bonds or two nonmetals that share electrons Hyderabad

Question 6

What’s the difference between trigonal planner and trigonal pyramidal?

Answer 6

Trigonal pyramid old, will have one lone pair. Making it polar.

Question 7

What is a molecule tetrahedral shape?

Answer 7

Molecule with a tetrahedral shape, will have all four bonded atoms in four electron sets.
Nonpolar even distribution and shape

Question 8

Empirical formula for 36.040. %, calcium and 64.96% chlorine.

Answer 8

• Make calcium chloride equal 100 g and get 36.04% of that hundred grams and it will be calcium then get 64.96% chlorine and that will be the grams of chlorine.
• then get the molar mass of calcium and molar mass of chlorine. 

Question 9

Prepare a Percent composition aqueous solution or given grams, milliliters, and percentage. v/v w/w

Answer 9

Whatever the percentage is will be that number of grams over milliliters over 100 g or milliliters multiplied by what you are being asked to prepare. Ex. Prepare a 75.0 g of 7.20% w/w aqueous solution of xxxxx.
75g or mL of xxxx (7.2g or mL of xxxx / 100 g or mL of xxxx)

Question 10

How do you do a stoichiometry problem when they ask him to produce a certain number of grams how many grams of one of the components do they need?

Answer 10

First convert grams to moles multiply that by the ratio of the component over the final product that you’re finding multiply that by the grams of the component over one mole of the component. 

Question 11

How do you find the concentration of the H3O+ when given the concentration of the OH-

Answer 11

Kw = [H3O][OH] = 1.00 x 10^-14

Question 12

How to find the pH from concentration

Answer 12

-log(Mconcentration)

Question 13

How to finds the concentration from the pH

Answer 13

10 ^ -pH

Question 14

How does an alpha particle change an element

Answer 14

4/2HE
add 4 to atomic mass
Add 2 to atomic number

Question 15

How does an positron particle change an element

Answer 15

0/1e
Add 0 to atomic mass
Add 1 to atomic number of new element

Question 16

How does a beta particle change an element

Answer 16

0/-1 e
Add 0 to atomic mass
Minus one (-1) of the atomic number of the new element