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
allsm [11]
4 years ago
10

A hydrocarbon is a compound that contains mostly carbon and hydrogen. Calculate the percent composition (by mass) of the followi

ng hydrocarbon: C 7 H 16 .
Enter the percentages of carbon and hydrogen numerically to four significant figures, separated by commas.
Chemistry
1 answer:
Katena32 [7]4 years ago
7 0
C7H16, where C=12.01, and H=1.01, so the weight of the molecule would be 7(12.01)+16(1.01), or 100.23. The percentage of carbon would be found by ((7*12.01)/100.23)*100=83.88% Carbon
((16*1.01)/100.23)*100=16.12% Hydrogen
You might be interested in
What is the percent composition of Ba(OH)2?
Alex17521 [72]
Element Symbol Atomic Mass
Barium Ba 137.327
Hydrogen H 1.00794
Oxygen O 15.9994


Hope this helps, good luck
3 0
3 years ago
Read 2 more answers
Can someone help asap
umka2103 [35]

Answer:

The alphabet comprises 21 consonants and 5 vowels

6 0
3 years ago
A salt is formed when an acld and _____ react.<br>A.Water<br>B.another acid<br>C.base.​
Dovator [93]
Acid and base forms salts
4 0
3 years ago
_Cuo +H, → _Cu + _H,0
Elena-2011 [213]
<h3>Answer:</h3>

CuO(s) + H₂(g) →  Cu(s) + H₂O(l)

<h3>Explanation:</h3>
  • Assuming the reaction is the reduction of CuO by H₂
  • Then the balanced equation for the reaction is;

CuO(s) + H₂(g) →  Cu(s) + H₂O(l)

  • The equation shows the reducing property of hydrogen gas, such that hydrogen reduces metal oxides such as copper(ii)oxide to the respective metals.
  • The law of conservation requires chemical equations to be balanced so as the mass of reactants will be equal to that of products.
  • In this case; there is 1 copper atom, 1 oxygen atom and 2 hydrogen atoms on both side of the equation and thus the equation is balanced.

3 0
3 years ago
What is the mass of snow (in tons) on a 150.0ft by 45.0 ft flat roof after a 6.0 inch snowfall? Assume that 11 inches of snow is
Aneli [31]
6 inches of snowfall would be equivalent to 6/11 inches of water or 6/132 feet. So the volume of the equivalent amount of water on the roof is 150 ft. x 45 ft. x 6/132ft. = 306.8 cubic feet.   
Since there are 907185 grams in a ton and 28316.8 mL in a cubic foot, 1.00 g/mL is equivalent to 0.0312 tons/cubic foot  
Multiplying the two results gives 9.58 tons of snow.
5 0
3 years ago
Other questions:
  • Which of the following is the major argument against the use of nuclear power to generate electricity?
    12·2 answers
  • To what class of minerals do gold, silver, and copper belong?
    14·1 answer
  • What are the periodic trends of ionic radii? Check all that apply.
    8·2 answers
  • Suggest an environment where plants would not need a cuticle
    15·1 answer
  • The molar mass of barium nitrate (Ba(NO3)2) is 261.35 g/mol. What is the mass of 5.30 × 1022 formula units of Ba(NO3)2?
    14·2 answers
  • ¿Qué volumen de CO2 se ha obtenido a los 1,5 min, 2,5 min y 3,5 min?
    10·1 answer
  • What would you expect to happen if you raised the temperature of the water to 85°C? Check all that apply.
    7·2 answers
  • Mary, the mouse, was hiding in the rocks when she saw a sandwich hit the ground at
    12·1 answer
  • What is said to have occurred when an object experiences a frequency equal to its natural frequency?
    11·1 answer
  • Whats the best red waterproof lipstick? Need some help :)
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!