Chem Phys Strategies

Question 1

what does the nucleus emit during alpha-decay

Answer 1

2 protons and 2 neutrons

Question 2

B- vs B+ decay

Answer 2

B- – e- emission, so atomic number increases by 1 unit
B+ – position emission, so atomic number decreases by 1 unit

Question 3

relationship between OH- and pH

Answer 3

direct

Question 4

what makes a buffer

Answer 4

mix a weak acid and the salt of the acid’s conjugate base

Question 5

disproportionalization reaction

Answer 5

one element is both reduced and oxidized

Question 6

Which is the intermediate in a 2-step reactions

Answer 6

the one that shows up twice, as it will be canceled out in the net equation

it is formed in one step, and then consumed in the next

Question 7

core electrons

Answer 7

completed shells

Question 8

Zeff =

Answer 8

protons - core electrons

Question 9

equivalence point is (x) and 1/2 equivalence pt is (x)

Answer 9

0, both equal to eachother

Question 10

is heat absorbed or released to go from solid -> gas direction

Answer 10

absorbed

Question 11

is -H endo or exo

Answer 11

exo, which means heat is released

Question 12

When taking the log of a number that is > 1,

Answer 12

the answer will be positive.

Question 13

When taking the log of 1,

Answer 13

the answer is zero.

Question 14

When taking the log of a number < 1,

Answer 14

the answer will be negative.

Question 15

can you take the log of a number <0

Answer 15

no

Question 16

are spontaneous reactions reversible or irreversible

Answer 16

irreversible

Question 17

configuration of all naturally occuring amino acids

Answer 17

all are L, and chiral ones are S (except of Cys)

Question 18

Z and E designations can only be used for which bonds

Answer 18

C=C