1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ksenya-84 [330]
3 years ago
5

How much energy will be released from burning 230.0 g of liquid methanol (CH4O) in excess oxygen.

Chemistry
1 answer:
Assoli18 [71]3 years ago
4 0
The molar mass of methanol is 12.01 + 4.04 + 16 = 32.05 g/mol
230.0 g of methanol / 32.05 g/mol = 7.176 mol methanol
The heat of combustion of methanol (CH3OH or CH4O) is -715.0 kJ/mol. (Negative sign means the energy is released)
Multiplying 7.176 mol by -715.0 kJ/mol gives -5,131 kJ.
You might be interested in
The product of 2 × 104 cm and 4 × 10–12 cm, expressed in scientific notation is ____.
Hatshy [7]

Answer:

b,,

Explanation:

7 0
3 years ago
How do I calculate the boiling point of 25g of calcium chloride in 120g of water
Veronika [31]
I think, either 100 degrees celsius (as of water)
56 degrees celsius (acid)
or 118.1 degrees celsius (acetone)
5 0
3 years ago
Something with a density greater than 1.00 g ml
anzhelika [568]
Something with a density greater than 1.00 g ml will sink in waterThe density of water is 1 gm/cm^3=1000 kg/m^3, therefore, any element or object with density greater than 1 will sink in water.
Examples of elements with density greater than 1:
Aluminum (2700 kg/m^3 = 2.7 gm/cm^3)
Nickel ( 8910 kg/m^3 = 8.91 gm/cm^3)
5 0
3 years ago
Consider the cell pt | h2 (1 atm); h+ (? m) || hg2cl2(s); cl− (1 m) | hg 2 h+ + 2 e − → h2 e 0 = 0.00 v hg2cl2 + 2 e − → 2 hg +
Dmitry [639]

Answer:

1.39

Explanation:

[Hg2Cl2]= 1M

[H^+] = ????

E°cell= 0.35V

E= 0.268 V

Therefore E for the reaction must -0.082 V

n= 2 moles of electrons

From Nernst Equation:

E= E°cell- 0.0592/n log [Red]/[Ox]

0.0268= 0.35- 0.0592/2 log 1/[Ox]^2

-0.082= -0.0296 log 1/[Ox]^2

log 1/[Ox]^2= 0.082/0.0296

log 1/[Ox]^2= 2.77

1/[Ox]^2=Antilog (2.77)

[Ox]^2=1.698×10^-3

[Ox] = 0.0412 M

But pH= -log [H^+]= -log(0.0412)= 1.385

3 0
3 years ago
Read 2 more answers
5. Identify each of the following as an element, a mixture, or a compound.
VashaNatasha [74]

Answer:

Aluminum foil ~ element

Air ~ mixture

Water ~ compound

Salt Water ~ mixture

Copper Wire ~ element

Steel ~ element

4 0
3 years ago
Other questions:
  • The oxidation of magnesium to form magnesium oxide is shown by which balanced chemical equation?
    11·2 answers
  • In a relationship with two variables, when one variable becomes larger by a given factor and the other becomes smaller by the sa
    7·2 answers
  • What is commensalism
    11·1 answer
  • At a constant pressure, what temperature will be reached if a gas at 300 K with a volume of 0.1 liters is increased to 0.2 liter
    6·1 answer
  • Hydrogen sulfide and concentrated sulfuric acid react to form water and sulfur dioxide as shown in the following reaction:
    13·1 answer
  • If 16.00 g of O₂ reacts with 80.00 g NO, how many grams of NO₂ are produced? (enter only the value, round to whole number)
    10·1 answer
  • DHDHDHSHSHSHSVSVSBSHSHHAVAVABAVABAGAGAGAGAGAGABABABABBA
    8·2 answers
  • contrast copy and fill in this graphic organizer to contrast how different elements, isotopes, and ions are produced
    7·1 answer
  • How might someone dispute the results of your investigation? How might you counter the argument?
    9·1 answer
  • Elements has physical and chemical properties most similar to silicon?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!