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
Readme [11.4K]
2 years ago
14

A compound contains only carbon, hydrogen, and oxygen. Combustion of 10.68 mg of the compound yields 16.01 mg and 4.37 mg . The

molar mass of the compound is 176.1 g/mol. What are the empirical and molecular formulas of the compound
Chemistry
1 answer:
Verizon [17]2 years ago
5 0

Answer: See below

Explanation:

n of CO2​ = 0.364mmol

Mass of C = 0.364*12 = 4.368 mg

n of H2​O = 184.37​ = 0.243 mol

The compound has 2*0.243mmol of H

Mass of H = 0.486 mg

Mass of O = 10.68 − (4.368+0.486) = 5.826mg

Moles of O = 0.364

<u>C:H:O Ratios</u>

0.364 : 0.486 : 0.364

= 1 : 1.34 : 1

= 3 : 4 : 3

<u>So the empirical formula is C3​H4​O3​,</u>

Empirical formula mass

= 88= 2 × Molar mass

<u>And the molecular formula is C6​H8​O6</u>

You might be interested in
If 0.25 moles of KBr is dissolved in 0.5 liters of
Len [333]

Answer:

[KBr] = 454.5 m

Explanation:

m is a sort of concentration that indicates the moles of solute which are contianed in 1kg of solvent.

In this case, the moles of solute are 0.25 moles.

Let's determine the mass of solvent in kg.

Density of heavy water, solvent, is 1.1 g/L and our volume is 0.5L.

1.1 g = mass of solvent / 0.5L, according to density.

mass of solvent = 0.5L . 1.1g/L = 0.55 g

We convert the mass to kg → 0.55 g . 1kg /1000g = 5.5×10⁻⁴ kg

m = mol/kg → 0.25 mol /5.5×10⁻⁴ kg = 454.5 m

6 0
2 years ago
it takes 513 kj to remove a mole of electrons from the atoms at the surface of a piece of metal. how much energy does it take to
schepotkina [342]

Answer:

The right solution is "8.5\times 10^{-19} \ joule".

Explanation:

As we know,

1 mole electron = 6.023\times 10^{23} \ no. \ of \ electrons

Total energy = 513 \ KJ

                     = 513\times 1000 \ joule

For single electron,

The amount of energy will be:

= \frac{513\times 1000}{(6.023\times 10^{23})}

= 8.5\times 10^{-19} \ joule

8 0
3 years ago
A bumblebee flies with a ground speed of 15.0 m/s . Calculate its speed in km/h.
zheka24 [161]
Speed in km/hr = 15 x 18
                            ------------
                                 5
             
                          =   54 km/hr.

Hope this helps!

5 0
3 years ago
Read 2 more answers
A Punnett square without the genotypes of the parents is shown below.
hammer [34]

Answer:

Genotype of parents is CC and Cc

Explanation:

Please see the attachment

8 0
2 years ago
What cell part is NOT found in all cells?
elena-s [515]

Answer:

heart I think also I'm so sorry if I get you this wrong I think membrane not sure tell me what was the right answer but I think membrane.

3 0
3 years ago
Other questions:
  • If Element X has 85 protons, how many electrons does it have
    7·2 answers
  • What do the arrows indicate ? A)plate movement. B)ocean flow. C)mid ocean ridge. D)continental drift.
    12·2 answers
  • Which hybridization of orbitals is present in beryllium fluoride, BeF2?
    15·1 answer
  • Choose all that apply.. What are the functions of corporate management?
    6·2 answers
  • Billions of years ago, Earth was a very hot place due to
    14·1 answer
  • A 100 g sample of substance A is composed of 57.1 g of oxygen and 42.9 g of carbon. Another 100 g sample of substance B is made
    8·1 answer
  • Of the following metals, which ions are most easily reduced? Use the following table to answer the question.
    9·1 answer
  • Which characteristics define a liquid?
    11·2 answers
  • Ас
    6·1 answer
  • This is the chemical equation for the production of ammonia (chemical formula: NH3) from Nitrogen and Hydrogen (N2 and H2):
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!