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
balu736 [363]
3 years ago
8

A compound contains 64.27% carbon, 7.19% hydrogen, and 28.54% oxygen. the molar mass is 168.19 g/mol. what is the molecular form

ula
Chemistry
1 answer:
coldgirl [10]3 years ago
5 0
Empirical formula is the simplest ratio of whole numbers of components in a compound 
calculating for 100 g of compound 
                                             C                             H                             O
mass                                  64.27 g                   7.19 g                     28.54 g
number of moles        64.27 g / 12 g/mol      7.19 g/1 g/mol     28.54 g / 16 g/mol 
                                        = 5.356 mol           = 7.19 mol           = 1.784 mol 
divide by least number of moles  
                                     5.356 / 1.784            7.19 / 1.784         1.784 / 1.784
                                      = 3.002                     4.03                     = 1.000
rounded off to nearest whole number 
 C - 3
 H - 4
 O - 1
empirical formula - C₃H₄O
 
 mass of empirical formula = 12 g/mol  x 3 + 1 g/mol x 4 + 16 g/mol x 1 = 56 g
molecular mass = 168.19 g/mol 
molecular formula is the actual ratio of elements making up the compound 
number of empirical units = molar mass of molecule / empirical mass
      empirical units = 168.19 g/mol  / 56 g = 3.00
there are 3 empirical units making up the molecular formula 
molecular formula = 3 x C₃H₄O

molecular formula = C₉H₁₂O₃

                 
You might be interested in
What mass, in grams, of carbon dioxide gas can be produced by complete combustion of 24.0 grams of carbon?
Elan Coil [88]
Jhuftghhhbbrdcbjkkjhuuuyyggfggg
3 0
3 years ago
What happens to the hydrogen ion (H+) concentration as an aqueous
padilas [110]

Answer:

Explanation:

It can be determined by measuring the Ph. D is incorrect.

C: is wrong because if you are making something acidic, you are increasing the H+

B: is the correct answer.

A: pH decreases. H+ increases which makes the Ph decrease. It is an oddity of the formula that makes this happen.

7 0
2 years ago
Read 2 more answers
Suppose that when you wake up in the morning, you are very hungry. You go to the refrigerator and remove an egg. On the way to t
Hunter-Best [27]
4- when you cook the egg because when you coook the egg it is no longer raw and you cant re do it so there for it is a chemical chabge
4 0
3 years ago
Read 2 more answers
How do scientists prevent the nonpolar perfluorocarbons
Pavel [41]

Scientists prevent the nonpolar perfluorocarbons

in Oxygent from separating from the water by adding surfactant.

<u>Explanation:</u>

The  collection of oxygen from lungs and transporting it  all those tissues present in the human body and taking carbon dioxide back to lungs are the main functions of the hemoglobin. But, instead of this hemoglobin, When perfluorocarbons , a nonpolar chemical is used to perform the same function for the oxygen transportation, the nonpolar chemical may not mix well with the water when this perfluorocarbons is taken through a water-based saline .

For this purpose an addition of a chemical called surfactant is done. This will enhance the chemical bonding between the non polar chemical and water. The perfluorocarbons  spreads into some droplets and gets coated with this bonding substance. Thus it gets attached to the water.

3 0
3 years ago
In the combined gas law if a variable is not constant you can remove it from the equation to reveal the gas law you need to solv
devlian [24]

Answer:

False

Explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • Like charges are attracted to one another. <br><br><br> True<br><br> False
    14·2 answers
  • A piece of unknown metal with mass 68.6 g is heated to an initial temperature of 100 °C and dropped into 84 g of water (with an
    12·1 answer
  • Do you think human activity is responsible for global warming
    10·1 answer
  • At low temperatures and pressure, how does the volume of a real gas compare with the volume of an ideal gas under the same condi
    14·1 answer
  • What greenhouse gas will stay in the atmosphere the longest
    10·1 answer
  • Assuming you have 6.24 x 1014 electrons and the surface area of the pail is 0.2 m2, what is the charge density (C/m2)?
    5·1 answer
  • How many particles are in 100ml
    11·1 answer
  • How do you calculate the volume of a cube? A. with a graduated cylindar in mL? B. with a triple beam balance in g? C. with a bea
    9·1 answer
  • C4H10 + 02 ➡️ H20 + CO2<br> balance the equation
    14·1 answer
  • Of the three types of small energetic particles emitted from the core of certain atoms and characterized by rutherford, which is
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!