Stoichiometry
How many moles are in 35.4g of Li2CO3
0.479 mols
Identify what is being oxidized, reduced, and the oxidation states. Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s)
Zn: +2 (oxidation)
Cu: +2(reduction)
how many lone pairs and bonds does a trigonal planer structure have?
what are the angles?
3 lone pairs and 1200 angles
What is the molarity of a NaOH solution if 45.0 mL is required to neutralize 25.0 mL of 0.150 M HCl?
0.0833M NaOH
If I have 4.5 mols of NaCl with a molarity of 0.107M, what is the volume?
42L
If you start with 8.50 g of H₂ and nitrogen is in excess, how many grams of NH₃ can be produced?
47.9g
Identify what is being oxidized, reduced, and the oxidation states. 4Fe(s) + 3O₂(g) → 2Fe₂O₃(s)
Fe: +3 (oxidation)
O: −2 (reduction)
Draw it
trigonal bipyramidal
What volume of 0.200 M KOH is needed to completely neutralize 30.0 mL of 0.250 M H₂SO₄?
75.0ml
If I have 3.0ml of CaI2 with a molarity of 2.40M, how many mols of CaI2 do I have?
0.0072 mol of CaI₂
If you start with 13.5 grams of aluminum, how many grams of aluminum oxide (Al₂O₃) can be produced?
25.5g
Identify what is being oxidized, reduced, and the oxidation states. H₂(g) + Cl₂(g) → 2HCl(g)
H: +1 (oxidation)
Cl: −1 (reduction)
if you have a molecule with square planer molecular geometry, what is the electron geometry?
what are the angles of the molecular geometry?
octohedral, 900
What mass of CaCO₃ is required to neutralize 50.0 mL of 1.00 M HCl?
2.50g CaCO3
If I have 74.0g of KOH in 4500ml H2O, what is the concentration of ions?
0.293 M
how many mols are in 26g of an alkane with 3 carbons
0.59mols
Identify what is being oxidized, reduced, and the oxidation states.
2Al(s) + 3Fe³⁺(aq) → 2Al³⁺(aq) + 3Fe(s)
Al: +3 (oxidation)
Fe: +3 (reduction)
draw IF₅ and label with all correct components of molecular geometry including name and bond angles
square pyramidal <90
You have 42g of H2O @45c that was added to a calorimeter in equilibrium w/ 32g of H2O @28c, the final temperature was 34c. What was the CCal?
CH2O = 4.184 J/gc
188 J/c
25.4ml NaOH is needed to titrate 0.64g KHP, what is the concentration of NaOH
0.123M
Using basic ester composition, how many grams would you have with 7.6mols of ester
562.4g
Identify what is being oxidized, reduced, and the oxidation states. Cl₂(aq) + 2I⁻(aq) → 2Cl⁻(aq) + I₂(s)
Cl: −1 (reduction)
I: −1 (oxidation)
draw SeF₄ with all of the elements of molecular geometry including name and bond angles
what is its electron geometry?
seesaw molecular geometry with , <900 <1200, square bipyramidal
You have 50ml of .21 AgNO3 added to 50ml of 0.117M if HCl, The temperature went from 23.2c to 24.7c, what is the change of heat of the reaction
C = 4.184 J/gc
-628 J
If I want to dilute 3.4 mol of NaCl in 1.0L to 0.13M, how much water should I add?
25.2 L