Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

SAT Chemistry > Stoichiometry > Flashcards

Stoichiometry Flashcards

1
Q

What is the volume of 3 moles of O2 at standard temperature and pressure (STP)?

A

67.2 l = 3 x22.4 l

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

In the reaction H2SO4 + HI –> I2 + SO2 + H2O what is H2SO4?

A

oxidizing agent which loses electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Balance the following reaction C6H14 + O2 –> CO2 + H2O

A

2 C6H14 + 19 O2 –> 12 CO2 + 14 H2O

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

True or false: An oxiidzation number is the charge that an atom appears to have when the electrons in each bond are assigned to the more elctronegative of the two atoms involved in the bond.

A

true

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the empirical formula of acetic acid, CH3COOH?

A

CH2O

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

In which of the following compounds does Cl have an oxidization number of +7?

a. NaClO2
b. Al(ClO4)3
c. Ca(ClO3)2
d. LiClO3
e. none

A

b. Al(ClO4)3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is thr formula mass of CO2?

A

44 amu

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the product of heating cadium metal and powdered sulfur?

A

CdS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Balance the following reaction Cl2(g) + NaI(aq) –> I2(s) + NaCl(aq)

A

Cl2(g) + 2 NaI(aq) –> I2(s) + 2 NaCl(aq)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Which is the strongest reducing agent in the redox reaction, FeCl3(aq) + NaI(aq) –> I2(s) + FeCl2(aq) + NaCl(aq)

A

NaI

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

If 14.5 moles of N2(g) are mixed with 34 moles of H2(g) in the following reaction N2(g) + 3 H2(g) –> 2NH3(g) and the reaction yields 18 moles of NH3(g), how many moles of N2(g) remain.

A

5.5 moles on N2(g)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

True or false: CaCO3 –> CaO + CO2 is a decomposition/redox reaction.

A

false, not redox since no gain or loss of electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How many gram of H2O can be formed in a reaction between 10 grams of oxygen and 1 grams of hydrogen

A

9 grams of H2O since 0.5 O2 + H2 –> H2O

stoichiometric ratio: 0.5 O2 : 1 H2 : 1 H20

mass ratio: 16 O2 : 2 H2 : 18 H2O

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How many grams of Ba2+ ions are in an aquesous solution of BaCl2 that contains 6.8 x 1022 Cl ions?

A

7.8 g because have 0.113 moles of Cl ions and 0.0565 moles of Ba ions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the oxidation number of Br in NaBrO3?

A

5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

True or false: 2 H2O2(s) –> 2 H2O(l) + O2(g) is decompostion non-redox reaction.

A

False. decomposition redox reation

17
Q

Calculate the number of O2 molecules if a 15.0 l cylinder is filled with O2 at STP.

A

4.03 x 1023 = 15.0 / 22.4 x 6.022 x 1023

18
Q

True or false: In a redox reaction balanced by the oxidization number method by determining the electrons lost by substance oxidized and the electrons gained by substance reduced.

19
Q

Write equation which represents the oxidation of Co2+.

A

Co2+ –> Co3+ + e-

20
Q

How many moles of phosphorus trichloride are required to produce 365 grams of HCl when the reaction yields 75%. PCl3(g) + 3 NH3(g) –> P(NH2)3 + 3 HCl(g)

A

365 g HCl = 10 moles HCl

since yield is 75% then 10 moles/0.75 = 13.3 moles

stoichiometric ratio: 1 PCl3 : 3 HCl

13.3 moles/3 = 4.17 moles of PCl3

21
Q

What is oxidation number of liquid bromine in elemental state?

A

0, all elements in fee state ave oxidization number of 0

22
Q

In the unbalanced reaction C3H8(g) + O2(g) –> CO2(g) + H2O(g) if 2.6 of propane is burned what volume of H2O is produced?

A

Stoichiometric ratio: 1 C3H8 : 4 H2O

4 x 2.6 l = 10.4 l

23
Q

When aluminum reacts with ferric oxide (Fe2O3), a displacement reaction yields two products with one being metallic iron, what is the sum of coefficints of the products of the balanced reaction?

A

3

Fe2O3 + Al –> 2 Fe + AlO3

24
Q

Which substance is reduced in the following redox reaction?

HgCl2(aq) + Sn2+(aq) –> Sn4+(aq) + Hg2Cl2(s) + Cl-(aq)

25
Q

What is coefficient of P in the balanced equation

P(s) + O2(g) –> P2O5(s)

26
Q

True or false: In abasic solution, the followig are guidelines for balancing a redox reaction by half reaction method.

  1. Add the two half-ractions together and cancel dentical species on each side of the equation
  2. Multiply each half-reaction by a whole number of electrons lost by the substance oxidized is equal to the electrons gained by the substance reduced
  3. Write balanced half-reaction for the substance oxidized and the substance reduced.
27
Q

What is the molecular formula of galactose, if the empirical formula is CH2O and the molar mass is 180 g/mole?

28
Q

How many formula units of lithium iodide (LiI) have mass equal to 6.45g if LiI = 133.85 g/mole

A

~2.9 x 1022

29
Q

What are the possible products of N2 and O2?

A

NO, NO2, N2O

30
Q

What is coefficient of O in the balanced equation

P(s) + O2(g) –> P2O3(s)

31
Q

Which substance is the weakest reducing agent given the spontaneous redox reaction?

Mg(s) + Sn2+(aq) –> Mg2+(aq) + Sn(s)

SAT Chemistry (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions