answer.
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
Elena L [17]
2 years ago
13

Determine the empirical formula for a compound that is 70.79% carbon, 8.91% hydrogen, 4.59% nitrogen, and 15.72% oxygen.

Chemistry
1 answer:
Debora [2.8K]2 years ago
4 0

Answer:

The answer to your question is:       C₁₈ H₂₇ N O₃

Explanation:

Data

Carbon = 70.79 g

Hydrogen = 8.91 g

Nitrogen = 4.58 g

Oxygen = 15.72 g

Process

AT C = 12 g

AT H = 1 g

AT N = 14 g

AT O = 16 g

                   Carbon

                                  12 g ------------------------  1 mol

                           70.79  g -------------------------   x

                                 x = (70.79 x 1) / 12

                                 x = 5.9 mol of C

                  Hydrogen

                                   1 g -----------------------  1 mol

                                8.91 g ---------------------   x

                                  x = (8.91 x 1) / 1

                                  x = 8.91 mol of H

                  Nitrogen

                                 14 g ---------------------- 1 mol

                                4.58 g -------------------   x

                                   x = (4.58 x 1) / 14

                                   x = 0.33 mol

                  Oxygen

                               16 g ------------------------  1 mol

                               15.72 g --------------------   x

                                  x = (15.72 x 1)/16

                                 x = 0.98

Divide by the lowest number of moles

Carbon               5.9 / 0.33     =  17.9   ≈ 18

Hydrogen           8.91 /  0.33  =   27

Nitrogen             0.33 / 0.33  =    1

Oxygen               0.98 / 0.33 =    2.9  ≈ 3

                             C₁₈ H₂₇ N O₃

You might be interested in
Emma wants to go swimming the first day the pool opens in May, but she is worried it will be too cold since summer only just sta
Genrish500 [490]

Answer:

the water is not warm enough for her

Explanation:

Given that

Her preferred temperature = 82°F

Thermometer in water reads = 24°C

Convert the preferred temperature to °C

°C=5/9 (82-32)

°C = 27.8 °C

Hence the water is not warm enough for her

6 0
2 years ago
A reaction produces a gas, which is collected in a glass cylinder. When a glowing splint is placed inside the container, it burn
Gnesinka [82]

Answer:

true

Explanation:

5 0
2 years ago
You are performing an experiment in your lab. To compare with other experiments you need your results to be in moles. During you
lys-0071 [83]

To be able to compare the result with other experiments it has to be reported in moles.

number of moles = mass / molecular weight

number of moles of Mg(H₂PO₄)₂ = 600 / 218 = 2.75 moles

7 0
2 years ago
Read 2 more answers
Tear gas has the composition 40.25% carbon, 6.19% hydrogen, 8.94% oxygen, 44.62% bromine. what is the empirical formula of this
andre [41]
<span>Calculating the moles and the moles ratio of the elements gives us the ratio of atoms in each element. Converting the percentage of element into grams 40.25% carbon = 40.25/100 = .4025 * 100 g of carbon = 40.25g of C 6.19% hydrogen = 6.19/100 = .0619 * 100g g of hydrogen = 6.19g of H 8.94% oxygen = 8.94/100 = .0819 * 100 g of oxygen = 8.19g of O 44.62% bromine = 44.62/100 = .4462 * 100 g of bromine = 44.62g of Br Converting the grams of element into moles (48.38 g C) (1 mol/ 12.10 g C) = 4.028 mol C (8.12 g H) (1 mol/ 1.008 g H) = 8.056 mol H (53.38 g O) (1 mol/ 16.00 g O) = 3.336 mol O (44.62g of Br)(0.012515018021626 moles) = 0.55842 mol Br Calculating the moles ratio of elements by dividing the small number of moles of an element 4.028 mol C /0.55842 = 7.2 mol C x 5 = 36 mol C 8.056 mol H / 0.55842 = 14.42 mol H = 72 mol H 3.336 mol O / 0.55842 = 5.97 mol O = 30 mol O 0.55842 mol Br / 0.55842 = 1mol Br = 5 mol Br So the empirical formula is (C6H12O5)6Br5</span>
8 0
2 years ago
Read 2 more answers
Write the word equation for the reaction of barium nitride with potassium
Irina18 [472]

Answer:

Well this is a metathesis or partner exchange reaction....and barium sulfate is as soluble as a brick...

Explanation:

And so...

Ba(NO3)2(aq)+K2SO4(aq)→2KNO3(aq)+BaSO4(s)⏐↓

Note that you simply HAVE TO KNOW that barium sulfate is insoluble....as is lead sulfate, and as is (less so) calcium sulfate

Explanation:

8 0
2 years ago
Read 2 more answers
Other questions:
  • How many moles of libr are contained in 347 g of water in a 0.175 m libr solution?
    7·1 answer
  • What kinds of intermolecular forces are involved in solution formation?
    14·1 answer
  • Suppose you did not have any indicator available, how else would you be able to identify the end point of the titration?
    13·1 answer
  • White phosphorus (P4) is used to produce phosphorus oxides, such as P4O10. How many kilograms of P4O10 would be produced from 41
    7·1 answer
  • Beer brewing begins with steeping grains in hot water, releasing the sugars inside. The sugar water is then heated to a boil and
    12·1 answer
  • Beaker A contains 100.0 g of water initially at 10EC. Beaker B contains 100.0 g of water initially at 20°C. The contents of the
    7·2 answers
  • If 4.9 kg of CO2 are produced during a combustion reaction, how many molecules of CO2 would be produced?
    13·1 answer
  • Calculate the internal energy of 2 moles of argon gas (assuming ideal behavior) at 298 K. Suggest two ways to increase its inter
    13·1 answer
  • We would like to make a golden standard kilogram in the shape of circular cylinder. The density of gold is 19.32 g/cm3. a) Find
    9·1 answer
  • What is the mass of a sample of metal that is heated from 58.8°C to 88.9°C with a
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!