Reference table
What element at STP has a boiling point of 357
Mercury
smallest unit of an element that maintains the properties of the element
atom
What is the formula used to calculate the concentration of a solution in parts per million
mass of solute/ mass of solution *10^6
For a decrease do you
1-take towards
2-add away
3-add towards
4-take away
For a decrease do you
1-take towards
2-add away
3-add towards
4-take away
What event must always occur for a chemical reaction to take place
A- format of precipitate
B-Formation of gas
C- effective collisions between reacting particles
D-addition of a catalyst to the reaction system
C
what group are Noble gases
18
negatively charged particles that orbit the nucleus
electrons
A substance has a mass of 20g and v volume of 5 ml whats the density?
destiny =mass / volume
20/5 =4
4
For an increase do you
1-take towards
2-add away
3-add towards
4-take away
2-add away
What does empirical mean
simplest form
According to table G with is least soluble in 100g of water at 20
KCIO3
electrons with the highest energy level (outermost shell)
valence electrons
What is the formula used for specific combined formula when using gas pressure and volume?
P1V1/T1=P2V2/T2
What happens to the concentration of N2 when a increase in stress is put on 3H2
N2 + 3H2 --- 2NH3
N2 decrease
what is dissolved in solution
solute
What element has the smallest atomic radius
Sodium
Aluminum
Chlorine
Chlorine
bond when electrons are shared between 2 nonmetals
bond when electrons are shared between 2 nonmetals
100g sample has a half life of 10 years. How much remains after 30 years
30 years=3 half lives
100--50--25--12.5 g
What direction does equilibrium shift when you have an increase in A
A+B -- C+ D
Shift right C D A increase B decrease
reaction that releases energy
exothermic
elements in the same period have the same what
number of shells
mass that takes up space
matter
How much heat is needed get 50g of water from 20c to 30 c
heat change 30-20=10
50*4.18*10=2,090 j
mc△T
2SO2+O2--2so3+ heat
which change causes the equilibrium to shift to the right
1-adding a catalyst
2-adding more O2
3-decreasing the pressure
4-increasing the temp
Adding more O2
name for elements that are a mixture
homogeneous