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
IgorLugansk [536]
2 years ago
10

Laws differ from theories because laws do not provide

Chemistry
1 answer:
o-na [289]2 years ago
7 0

Answer:

C. An explanation

You might be interested in
g When 2.50 g of methane (CH4) burns in oxygen, 125 kJ of heat is produced. What is the enthalpy of combustion (in kJ) per mole
Anna [14]

Answer:

-800 kJ/mol

Explanation:

To solve the problem, we have to express the enthalpy of combustion (ΔHc) in kJ per mole (kJ/mol).

First, we have to calculate the moles of methane (CH₄) there are in 2.50 g of substance. For this, we divide the mass into the molecular weight Mw) of CH₄:

Mw(CH₄) = 12 g/mol C + (1 g/mol H x 4) = 16 g/mol

moles CH₄ = mass CH₄/Mw(CH₄)= 2.50 g/(16 g/mol) = 0.15625 mol CH₄

Now, we divide the heat released into the moles of CH₄ to obtain the enthalpy per mole of CH₄:

ΔHc = heat/mol CH₄ = 125 kJ/(0.15625 mol) = 800 kJ/mol

Therefore, the enthalpy of combustion of methane is -800 kJ/mol (the minus sign indicated that the heat is released).

3 0
2 years ago
Pls help why is it reduced
Ipatiy [6.2K]

Answer:

its orginal charge is none then through the reaction it is reduced because then final charge is -1 meaning is went down 1 so its charge was reduced

Hope this helps! :)

4 0
2 years ago
Read 2 more answers
One of the steps in processing some metals is smelting. what does smelting do for a metal?
vichka [17]
Hey there,
Smelting's main use is to produce a base metal from its ore

Hope this helps :))

~Top
8 0
3 years ago
WILL MARK BRAINLIEST IF YOU ANSWER WITHIN 5 MINUTES
tensa zangetsu [6.8K]

Answer:

This is and ADDITION REACTION

Explanation:

Because your putting a compound and an element together

6 0
3 years ago
Read 2 more answers
Often computers are described as not intelligent. How does the mindstorm prove this?
n200080 [17]

Answer:

CH4+2O2-->2H2O+CO2 chemical reaction

3 0
3 years ago
Other questions:
  • *****
    11·1 answer
  • Which of the following correctly describes solid, liquid, and gas states of matter?
    10·1 answer
  • rewrite this sentence to reflect the correct way to write latitude 30 degrees north, 50 minutes, 17 seconds
    15·1 answer
  • An element's ability to react with acid is an example of a
    15·1 answer
  • El compuesto del cianuro
    5·1 answer
  • How many moles of NO are formed from 2.5 moles of NO2 if there is plenty of water present
    9·1 answer
  • Copper roofs on houses form patina (copper carbonates) over the course of years due to the reaction with oxygen, carbon dioxide
    13·1 answer
  • I need help with science: Which picture best shows a loud, low-pitched sound?​
    10·1 answer
  • What is the name of a solution where no more solute will dissolve
    8·1 answer
  • How many moles are in an 8.40 grams of a non electrolyte solution
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!