Periodic Trends
Whats a valence electron?
The outer most electron
What is first when naming ionic compounds metals or nonmetals?
Metals
Balance Na+Br2-----NaBr
What's the formula for finding Mass-Mass stoichiometry?
Given info x 1 mole/Grams A x Mole ratio Mole B/Mole A x Grams B/ Mole
What is the specific heat formula?
q=m x c x delta T
Does the atomic radius decrease going right to left on on the P.T?
Yes
What's the chemical name for MgS
Magnessium sulfide
Balance P+O2-----P2O5
4P+5O----2P2O5
Find the number of moles in 2700 g of H^2O?
150 moles H2O
Convert 28.4 joules to calories
6.8Cal
What is shielding?
Innermost electrons repel outer electrons
What's the chemical naming for CCl?
Carbon Chloride
H10+O2-----H2O
2H10+5O2-----10H2O
How many grams of Calcium carbonate are required in preparation of 50 grams of Calcium Oxide?
CaCO3---> CaO +CO2
B A
89.3 CaCO3
Convert 60.1 calories to joules
251.5J
Which has higher I.E? Helium or Argon
None
What's the chemical naming for NaNO3
Sodium Nitrate
Balance NaBr+Ca(OH)2----Na(OH))+CaBr2
4NaBr+2Ca(OH)2----4Na(OH))+2CaBr2
If 80 grams calcium chloride react with silver nitrate, how many grams of silver nitrate are produced?
CaCl2+2AgNO3---Ca(NO3)3+2AgCl
A B
208gACl
What is the specific heat of a sample of 10 grams that requires 150J to change 15c to 25c
15000J
What happens to I.E as you go down a column?
Increases
What's the lewis dot structure for NH3
...
Balance C8H18O2+O2----H2O+CO2
2C8H18O2+23O2----18H2O+16CO2
Find the percent composition H2O
H:11.1
O:88.9
The temperature of 55.6 grams of a material decreases by 14.76 when it loses 3080J of heat, what is the specific heat