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
Masja [62]
3 years ago
13

How many carbon atoms are contained in 2.8 g of c2h4 ?

Chemistry
2 answers:
MrRa [10]3 years ago
8 0

Answer:

The answer to your question is:  1.205 x 10²³ atoms of Carbon

Explanation:

Data

Carbons atoms contained in 2.8 g C₂ H₄

MW C₂ H₄ = (12 x 2) + (4 x 1) = 24 + 4 = 28 g

                         28 g of C₂ H₄ ----------------  24 g of carbon

                         2.8 g C₂ H₄   -----------------    x

                         x = (2.8)(24) / (28)

                            = 2.4 grams of C

                             1 mol  -------------------   12 g of Carbon

                             x        -------------------    2.4 g

                            x = (2.4x 1) / 12 = 0.2 mol

                             1 mol -----------------   6.023 x 10 ²³ atoms

                           0.2 mol  --------------     x

                            x = (0.2 x 6.023 x 10 ²³) / 1

                              = 1.205 x 10²³ atoms

kodGreya [7K]3 years ago
8 0

Explanation:

As molar mass of C_{2}H_{4} is 28.05 g/mol and it is given that its mass is 2.8 g.

Therefore, calculate its number of moles as follows.

              No. of moles = \frac{mass}{\text{molar mass}}

                                    = \frac{2.8 g}{28.05 g/mol}

                                    = 0.099 mol

                                    = 0. 1 mol (approx)

And, according to the mole concept there are 6.022 \times 10^{23} atoms present in 1 mole of a substance.

Mathematically,    1 mole = 6.022 \times 10^{23} atoms or molecules

Therefore, calculate the number of carbon atoms present in 0.1 mol of C_{2}H_{4} as follows.

              2 \times 0.1 mol \times 6.022 \times 10^{23}}atoms /mol

                 = 1.204 \times 10^{23} atoms

Thus, we can conclude that there are 1.204 \times 10^{23} atoms of carbon atoms present in 0.1 mol of C_{2}H_{4}.

You might be interested in
What does it mean to be an exothermic chemical reaction? a) Energy is released when no new substances are made. b) Energy is rel
mario62 [17]

Answer:b

Explanation:

Energy is released to form the product

3 0
3 years ago
Jacob takes 7 classes, each 50.00 minutes long every day for the 5 day school week. How many hours per week does he spend in cla
Zina [86]

Answer: He spends 29.17 hours per week

Explanation:

1 class = 50mins

7 classes = 7 x 50mins = 350mins

For 5 days in a week, we have

5 x 350mins = 1750mins

Converting to hours, we have

1750 /60 = 29.17 hours

5 0
3 years ago
The molar solubility of ag2s is 1.26 × 10-16 m in pure water. calculate the ksp for ag2s.
MAXImum [283]
Answer is: Ksp for silver sulfide is 8.00·10⁻⁴⁸.
Reaction of dissociation: Ag₂S(s) → 2Ag⁺(aq) + S²⁻(aq)<span>.
</span>s(Ag₂S) = s(S²⁻) = 1.26·10⁻¹⁶ M.
s(Ag⁺) = 2s(Ag₂S) = 2.52·10⁻¹⁶ M; equilibrium concentration of silver cations.
Ksp = s(Ag⁺)² · s(S²⁻).
Ksp = (2.52·10⁻¹⁶ M)² · 1.26·10⁻¹⁶ M.
Ksp = 6.35·10⁻³² M² · 1.26·10⁻¹⁶ M.
Ksp = 8.00·10⁻⁴⁸ M³.
6 0
3 years ago
24. H2SO4 has
Eddi Din [679]

Answer:

C.

Explanation:

para sakin letter C ganonn

3 0
2 years ago
A child and his mother both have blue eyes. They both have blue eyes because inherited traits of an organism are governed by the
cluponka [151]
The answer would probably be c.
3 0
2 years ago
Read 2 more answers
Other questions:
  • What forms of matter exists that are not made of chemical bonds?
    13·1 answer
  • The density of copper is 8.94 g/cm3. An irregular shaped sample of metal is 14 g and displaces a volume of 2.98 mL. (a) Find the
    9·1 answer
  • Which if the following elements has atoms with the least amount of valence electrons
    10·1 answer
  • Which of these solutions has the highest freezing point?
    6·2 answers
  • Balance the combustion reaction between butane and oxygen. 2C4H10 + O2 → CO2 + H2O
    8·2 answers
  • 100 points bc why not :P Which statement best describes heating by radiation?
    7·1 answer
  • What happened to Mendeleev's mother after he was accepted into St. Petersburg University?
    12·1 answer
  • Flourine atom. Drag a valence electron from the left atom to the right atom. What happens? <br>​
    5·1 answer
  • Need help on this question
    9·1 answer
  • Picture of chart is added. Please help and answer this question i will mark brainliest if question is answered correctly. Would
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!