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
abruzzese [7]
3 years ago
13

Complete combustion of 7.20 g of a hydrocarbon produced 22.1 g of co2 and 10.5 g of h2o. what is the empirical formula for the h

ydrocarbon?
Chemistry
1 answer:
jek_recluse [69]3 years ago
5 0
<span>C3H7 The unknown compound consists of only carbon and hydrogen. The oxygen comes from the air. So you need to first determine the relative moles of hydrogen and carbon that are present in the CO2 and H2O. First, look up the molar masses of Carbon, Hydrogen, and Oxygen. Then determine the molar masses of CO2 and H2O. Carbon = 12.0107 Hydrogen = 1.00794 Oxygen = 15.999 Molar mass of CO2 1 * 12.0107 + 2 * 15.999 = 44.0087 Molar mass of H2O 2 * 1.00794 + 1 * 15.999 = 18.01488 Number of moles of CO2 22.1 g / 44.0087 g/mol = 0.502173 Number of moles of H2O 10.5 g / 18.01488 g/mol = 0.582852 Since there's 1 carbon atom per CO2 molecule, there are 0.502173 moles of carbon. Since there's 2 hydrogen atoms per H2O molecule, there are 2 * 0.582852 = 1.165703 moles of hydrogen. Now we need to find a simple ratio of small integers that comes close to the ratio of 0.502173 / 1.165703 = 0.43079 to determine the empirical formula. 3/7 = 0.428571, an error of only 0.002219. The next closest ratio has an error of 0.013654, over 6 times larger. So the empirical formula is C3H7</span>
You might be interested in
Over a long period of time, a group of people were exposed to high degrees of UV radiation from the sun. While no one became sic
aksik [14]

Answer:

acquired/harmful

Explanation:

This type of mutation and exposure will cause indefinite problems.

4 0
3 years ago
Read 2 more answers
PLEASE HELP!
Anon25 [30]

Answer:

C. Mole

Explanation:

Chemical formula deals with mole number

4 0
2 years ago
Calculate the mass of water produced by the metabolism of 49.0 g of glucose (C6H12O6). C6H12O6 + 6O2 → 6CO2 + 6H2O
aivan3 [116]
I will mark brainlist please help

1) what is the subject of a sentence?

• the verb

• tells who or what the sentence is about

• the action in the sentence


2) What is the predicate of a sentence?

• who the sentence is about?

• tells what the subject is or does


3) What is the PREDICATE in this sentence.

- Mrs. Shaffer is crazy


• Mrs. Shaffer

• is

• is crazy

• Shaffer is crazy


4) what is the predicate of this sentence.

- Friday is the best day of the week

• Friday

• is the best day of the week


5) What is the subject of this sentence?

- The turtle is swimming in the ocean

• the turtle

• is swimming in the ocean


6) What is the the complete predicate of this sentence?

- The class studied whales.

• class

• the class

• whales

• studied whales


7) What is the predicate in the sentence

- She drank her whole glass of milk

• she

• milk

• drank her whole glass of milk

• drank milk


8) what is the subject in the sentence?

- The music class attended the opera.

• the music class

• attended

• music


9) identify the complete subject.

- Susan and Kay went swimming.

• went swimming

• Susan and Kay

• went


10) identify the COMPLETE predicate

- Tina and her friends went to the movies

• Tina

• her friends

• to the movies

• went to the movies


11) identify the SIMPLE PREDICATE PART.

- Tina and her friends went to the movies

• Tina

• her friends

• went

• the movies

12) identify the circled line in the sentence.

- All of the ((((PLAYERS)))) went to practice

• complete subject

• simple subject

• simple predicate

• complete predicate


7 0
2 years ago
The maximum number of electrons in a valence shell is: <br> a. 2 <br> b. 8 <br> c. 18 <br> d. 32
vodomira [7]
B. 8

Although it may seem that transition metals would have more than 8 valence electrons, they in fact do not.
5 0
3 years ago
Read 2 more answers
What would be the result if Earth's unique atmosphere did not exist?
egoroff_w [7]
Then the earth would most likely not be able to support life. Our earth would be similar to mars. In that it might have supported life. It the thin atmosphere would over all be unable to sustain more complex species. The earth would also be much colder because the green house effect is what maintains our relatively warm atmosphere.
5 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the metals below will dissolve in hydrochloric acid, HCl? gold, Au copper, Cu silver, Ag magnesium, Mg
    9·1 answer
  • Calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxid
    11·1 answer
  • How do instantaneous speed and average speed differ?
    14·1 answer
  • 12) _Na+ _H2O → ___ NaOH + __H2
    5·1 answer
  • Why do reactions need to be balanced?
    15·1 answer
  • What are 2 indications that a chemical change has occurred?
    12·1 answer
  • An aqueous solution of sodium hydroxide is standardized by titration with a 0.170 M solution of perchloric acid. If 28.5 mL of b
    12·1 answer
  • When methane (CH4) gas is burned in the presence of oxygen, the following chemical reaction occurs.
    12·1 answer
  • Write formulas and names for two binary molecular compounds
    12·1 answer
  • How does this look? (Its for a science project about animal life
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!