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
hichkok12 [17]
3 years ago
11

A solution is made by mixing 37.g of thiophene C4H4S and 72.g of heptane C7H16. Calculate the mole fraction of thiophene in this

solution. Round your answer to 2 significant digits.
Chemistry
1 answer:
guajiro [1.7K]3 years ago
4 0

Answer:

0.38

Explanation:

Molar mass of thiophene= 84g/mol

Mass of thiophene = 37g

Number of moles= 37/84= 0.44 moles

Molar mass of heptane= 100 g/mol

Mass of heptane = 72g

Number of moles = 72/100= 0.72 moles

Total number of moles= 0.44 + 0.72= 1.16 moles

mole fraction of thiophene = 0.44/1.16= 0.38

You might be interested in
PLEASEEEE HELP I WILL MARK YOU BRAINIEST!!!!
Tju [1.3M]

Answer:

sorry i dont know the answer but i hope you can figure it out soon

5 0
3 years ago
Calculate the mass of 12.3 moles of MgSO4.​
Afina-wow [57]

Answer:

614 034 kg

Explanation:

n = m/Mm

m = n * Mm

Mm(MgSO4) = 1 * 24.3 * 1 * 32.1 * 4 * 16 = 49921.92

m = 12.3 * 49921.92

m = 614 034 kg

8 0
2 years ago
Read 2 more answers
HELP ME PLEASEEE
rusak2 [61]

Answer:

68.2%

Explanation:

3 0
2 years ago
2. Which type of glassware is used for general mixing, measuring and
ella [17]

Answer:

D

Explanation:

A beaker can be used for boiling coz it can withstand high temperatures.

It can be used for measuring the volume of a solid indirectly by measuring the displacement of a liquid.

It can as well be used for mixing coz it flat bottomed

5 0
2 years ago
For a cell whose potential is -0.46 v with 3 moles of electrons exchanged, what is DG?
Feliz [49]
ΔG = -nEF

ΔG = Gibbs free energy change
n = moles of electrones participated in
E = Electrode potential
F = Faraday constant

By substituting,
ΔG = -(3 mol) x 96485 A S/ mol x (-0.46) V
      = + 133149.3 J
      = + 133 kJ

Hence the answer is "b".

Since ΔG is a positive value, the reaction is non spontaneous reaction.
3 0
3 years ago
Other questions:
  • What is a factor that can influence the rate of a nuclear decay reaction?
    11·1 answer
  • Please help due tomorrow
    15·1 answer
  • the frog population in the Amazon basin varied. every 500 years there was a mutational change leading to speciation. in between
    10·1 answer
  • A 60.0 g block of iron that has an initial temperature of 250. °C and 60.0 g bloc of gold that has an initial temperature of 45.
    6·1 answer
  • Which element am I? Give my symbol ONLY! What a robber says as he's running away! ​
    5·2 answers
  • A solution of baking soda has a pH of 9. Baking soda _______.
    6·1 answer
  • What group does the element 1S22S22P63S23P6 belong to
    8·1 answer
  • Practically: Add 1.66 ml of my 0.3M lemonade to a 15 ml microcentrifuge tube. Add 3.33 ml of your diluent (water, in this case)
    10·1 answer
  • Brock wants to see a full cycle of one high tide to the next. About how long will Brock have to wait?
    6·1 answer
  • Question 2 (1 point)
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!