chemical formulas intermolecular forces
Which of the following compounds can form hydrogen bonds with other molecules of its own kind?
A) CH4 (Methane)
B) H2S (Hydrogen sulfide)
C) NH3 (Ammonia)
D) CO2 (Carbon dioxide)
C) NH3 (Ammonia)
what is the molar mass of H2O?
18 g/mol
In the reaction 2H2+O2→2H2O, what is the mole ratio of H2 to H2O?
1:1 (The coefficients are 2 and 2, which simplfiies to 1:1).
What is the pH range for an acidic solution
pH is less than 7.
What causes ocean acidification?
It is caused by human activities like burning fossil fuels (coal, oil, gas).
What has occuered in Ocean Acidification in the past 200 years?
30% increase in acidity
Classify this reaction:
2Mg+O2→2MgO
Synthesis (or Combination) Reaction
What is the Molarity (M) of a solution with 2 moles of salt in 4 Liters of water?
O.5 M
In the reaction NH3 + H2O⇌NH4++OH-, which substance acts as the Bronsted-Lowry Base?
NH3 (It accepts a proton to become NH4+).
Is the ocean actually becoming "acidic"?
The ocean is still alkaline (basic), not acidic.
What is the chemical formula for Magnesium Oxide?
MgO
Balance this equation
CH4+O2→CO2+H2O
1CH4+2O2→1CO2+2H2O.
How many moles are in 80 grams of NaOH?
2 moles
If a reaction is at equilibrium, what is true about the rate of the forward reaction compared to the reverse reaction?
The rates are equal
CH4(g) + H2S (G) ⇌ CS2 (g) + 4H2 (g)
what is temp increasing
equilibirum shift top arrow left bottom right
CH4 ^
H2s ^
cs2 v
h2 v
Keq na
What is the name of the compound FeCl3?
Iron(III) Chloride.
Classify this reaction
HCI + NaOH→NaCl+H2O
Double Displacement reaction
How many grams are in 1.204 x 1024 atom of carbon?
24 grams
If [H+]=1.0x10-4m, what is the [OH-] concentration?
[OH-]=1.0x10-10M
CH4(g) + H2S (G) ⇌ CS2 (g) + 4H2 (g)
what is pressure increasing
equilibirum shift top arrow right bottom arrow left
CH4 ^
H2s ^
cs2 v
h2 v
Keq na
Which of these molecules exhibit hydrogen bonding:
CH4, H2O, or HCI?
H2O (water)
Using the Activity series: Will Zn + CuCl2→occur? If so, what are the products?
Yes, it will occur. Products: ZnCL2+Cu.
if you have 56 marshmallows 120 Graham crackers and 232 chocolate in order to make 1 s"more you need 2 marshmallows 4 Graham crackers and 8 chocolate how much ingredients will be needed to make the maximum number of s'mores.
28 marhsmallows
30 crackers
29 chocolate
In the reaction N2+3H2→2NH3, how many moles of NH3 are produced from 6 moles of H2?
4 moles of NH3→2NH3
CH4(g) + H2S (G) ⇌ CS2 (g) + 4H2 (g)
what happens when CH4 concentration increases
equilibirum shift
CH4 V
H2s V
cs2 ^
h2 ^
Keq na