Final Review

Mols/Stoich

100

What is the molar mass of CO₂? 

44g/mol

200

Convert 8 mol of N₂ gas to L. 

CF = 22.4L/mol

179.2L

300

CH₄ + 2O₂ --> CO₂ + 2H₂O

2 mol O₂ produces how many mols CO₂? 

4 mol CO₂

400

CH₄ + 2O₂ --> CO₂ + 2H₂O

How many grams of CH₄ does it take to produce 10 mol H₂O? 

80 g CH₄

500

CH₄ + 2O₂ --> CO₂ + 2H₂O

If I have 64g O₂, how many molecules of H₂O can I produce? 

1.2x10²⁴

Gas

100

What happens to pressure when we increase the volume of a gas while keeping temp constant? 

Pressure goes down by half. 

200

What happens to the pressure when we increase temp? 

It goes up. 

300

At a pressure of 1atm, 3mol O₂ will take up 6L of space at what temperature? 

PV=nRT

(1)(6)=(3)(8.314)(T)

T=.24 K 

400

If we start at 16atms and 6L, then we change the pressure to 10atms, what would the new volume be? 

PV=PV

(16)(6)=(10)(V) 

V=9.6L 

500

We start with 3mol of O₂ at a pressure of 400kPa. If we change the number of mols to 10mol O₂, what would the new pressure be? 

P/n = P/n

(400)/(3) = (P)/(10) 

P=1333.3 kPa

Solutions

100

Name 3 ways I can make something dissolve faster.

1. stir

2. heat

3. crush solute

200

I put sugar in tea to make sweet tea. Identify the solute vs solvent vs solution.

solute = sugar

solvent = tea

solution = sweet tea

300

What is the molarity of a solution that contains 6mol of solute in 12L of solution? 

6mol/8L = .75M

400

To 225 mL of a 2M of KI, a student adds enough water to make 1000 mL of a more dilute K solution. What is the molarity of the new solution? 

(225mL)(2) = (1000)(M)

M=.45

500

What volume of 6M HCl would be required to prepare 500mL of a .5M HCl solution? 

(6)(V)=(500)(.5)

V=41.67mL 

Thermochem

100

What is the accurate and precise measurement of heat flow for chemical & physical processes. 

Calorimetry

200

A log is burned. The log is the system. Is this endo or exothermic? What is the sign of delta H? 

exothermic, -delta H

300

2Mg + O₂ --> 2MgO + 100kJ 

Given the equation: how much heat is involved in the production of 16 mol of MgO? 

800 kJ

400

A 34g piece of iron absorbs 700joules of heat energy, and its temp changes from 30 to 40 degrees C. Calculate specific heat of iron. 

700=(34)(10)(C)

C=2.06

500

What is the specific heat capacity of silver metal if 82.4g of the metal absorbs 92.6 calories of heat and the temperature rises 15C? 

C=.075

Acid/Base

100

Name which is acid and which is base. 

1. Donates H+

2. Accepts H+

1. Acid 

2. Base 

200

A pH of 2 would be acidic or basic? 

acidic 

300

[H+] = 1x10^-9

What is the pH? 

Is it acidic, basic, or neutral? 

pH = 9

Basic

400

[OH-]=1x10^-3

What is the pH?

Acid/base/neutral

pH=11

basic

500

What is the [H+] if pOH=1.5? 

Is it a/b/n?

[H+]=1x10^-12.5

basic

Nuclear & Trivia

100

What is it called when a large nucleus breaks into 2 smaller nuclei? 

Fission

200

What is the difference between regular chem & nuclear chem? 

Regular chem deals with electrons. 

Nuclear chem deals with the nucleus. 

300

How many chambers of the heart does a fish have? 

2

400

How many bones do sharks have? 

0 all cartilage senor :D

500

How old was Tiger Woods when he won his first Masters (large golf tournament) 

21