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
mina [271]
3 years ago
7

You have 281 kilojoules how many kilocalories is it need to know ASAP

Chemistry
1 answer:
Paul [167]3 years ago
5 0
67.116 kilocalories is the answer
You might be interested in
Which statements correctly describe sound ( select all that apply)
xeze [42]

Answer:

The answer is all of the above

Explanation:

Sound has waves which are compression waves and those waves transfer into energy molecules. Sound is heard by human ears. Sound waves can behave in predictable ways. All sound requires a medium through to travel

5 0
3 years ago
How did oxygen first enter Earth's atmosphere?
forsale [732]

Answer:

I think c biological processes

8 0
3 years ago
Most of the electricity that is used in everyday life comes from________ current.
melamori03 [73]

Answer:

electric is your answer :)

Explanation:

Edge STEM instruction/assignment perhaps???

8 0
3 years ago
Read 2 more answers
What are 3 examples of physical change?
bazaltina [42]

Just breaking stuff so yea that’s it

3 0
3 years ago
Calculate the moles and grams of solute in each solution. D. 2.0 L of 0.30M Na2SO4. I already have A, B, and C. Thanks!
e-lub [12.9K]
Find the number of moles
C = n / V
C(Concentration) = 0.30 moles / L
V ( Volume) = 2 L
n = ??
n = C * V
n = 0.30 mol / L * 2 L
n = 0.60 mol


Find the molar mass
2Na = 23 * 2 = 46 grams
1S   = 32 * 1 = 32 grams
O4   = 16 * 4 = 64 grams
Total =            142 grams / mol

Find the mass
n = given mass / molar mass
n = 0.06 mol
molar Mass = 142 grams / mol
given mass = ???

given mass = molar mass * mols
given mass = 142 * 0.6
given mass = 85.2 grams. 

85.2 are in a 2 L solution that has a concentration of 0.6 mol/L


4 0
3 years ago
Read 2 more answers
Other questions:
  • An orbital would never exist in the quantum description of an atom is
    12·1 answer
  • Find the mass in grams of 2.65 x 10^24 molecules of cl2
    10·1 answer
  • Help me please!!! HELP ME
    8·1 answer
  • 7. In which environment would liverworts and hornworts grow?
    10·1 answer
  • A sound wave traveling through a certain freshwater lake has a frequency of 349.2 Hz and a wavelength of 4.25 m. What is the spe
    12·2 answers
  • A 3L sample of an ideal gas at 178 K has a pressure of 0.3 atm. Assuming that the volume is constant, what is the approximate pr
    15·1 answer
  • Will give brain!!!<br> Need images of structures of all alkanes and alkenes
    15·2 answers
  • In a different investigation, a student passed a current of 0.6 A through copper
    9·1 answer
  • I need help with chem. How do I know if this is balanced ?
    6·1 answer
  • In comparing a 0.25 molality aqueous NaCl solution to a 0.25 molality aqueous CaCl 2 solution:
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!