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
Zanzabum
3 years ago
9

Propane (c3h8) is burned in oxygen to produce carbon dioxide and water. the heat of combustion of propane is -2012 kj/mole. how

much heat is given off when 3.0 mol c3h8 are reacted with 10.0 mol o2? 1. 672 kj 2. 6036 kj 3. 2012 kj 4. 4024 kj 5. 1555 kj 6. 7392 kj
Chemistry
1 answer:
Olegator [25]3 years ago
5 0
C_{3} H_{8} + 5 O_{2} ---\ \textgreater \  3CO_{2}  +4H_{2}O    (-2012 \frac{kJ}{mol} )


3 mol                10 mol


C_{3}H_{8} is /excess /reactant

because 3 mol propane require 15 mol oxygen (by reaction)

5 mol oxygen ---1 mol propane, so

10 mol oxygen ---2 mol propane

Only 2 mole propane will be burned,

so 

2012 ( kJ/mol)*2 mol =4024 KJ heat will be given off

Correct answer is number 4.



You might be interested in
A(n) _________ light bulb uses the most energy and is not good to use for conserving energy.
Nata [24]

LED light bulb is more energy efficient than CFL bulb simply because they are based on better technology. LED light bulbs use much lesser energy in comparison to the traditional technology.

3 0
3 years ago
Why are most anions basic in H2O? Give formulas of four anions that are not basic.
AVprozaik [17]

Answer:

The anions that can act as bases (conjugate bases of weak acids) have the capability to hydrolyse water and produce OH− ions. Cl−, Br−NO−3, SO2−4 are all conjugate bases of strong acids that don't have the capability to hydrolyse water and so they aren't basic.

Explanation:

5 0
3 years ago
50 POINTS FOR THIS!
Leona [35]

first there is only 25 points on here because if you add 50 points to the question brainly divides it by two so that two people can answer so if you want each person to get 50 points or to advertise how much point sis on this quetstion you would instead need to add 100 points to the question- anyways let's answer this question now

Do you know what the Law of Conservation of mass says? Matter is neither created nor destroyed. Therefore, you have started with 12.7 g Cu and 3.2 g S on the left for a total of 15.9 g; therefore, you must obtain 15.9 g of product(s). If Cu2S is the only product there must be 15.9 g Cu2S.

5 0
3 years ago
When 10 calories of heat are absorbed by 1 gram of water, the molecules vibrate faster and the temperature ________?
san4es73 [151]
The temperature increases.
6 0
3 years ago
What is the molar mass of chlorine?
aalyn [17]
Molar mass Chlorine ( Cl ) = 35.45 g/mol

hope this helps!
4 0
3 years ago
Other questions:
  • The maximum energy available for useful work from a spontaneous reaction
    15·1 answer
  • A chemical equilibrium, the amount of (blank) because( blank)
    9·1 answer
  • Suppose you need to prepare 138.1 mL of a 0.190 M aqueous solution of NaCl. What mass, in grams, of NaCl do you need to use to m
    9·1 answer
  • Under which conditions is a reaction spontaneous?Edmentum.
    9·1 answer
  • Why are many chemical names so complex?
    12·1 answer
  • What is the molecular formula of sodium hydroxide??​
    15·2 answers
  • The two most abundant isotopes of boron are 10B and 11B, with 11B being about 4 times more abundant. In the mass spectrum of tri
    13·1 answer
  • I will give 500 points! What is the composition of Milk?
    9·2 answers
  • PLEASE HELP!!!!!!!
    9·1 answer
  • Pure elemental gases, such as O2 and N2, have very low melting points. At around -220°c. What is one reason that this is the cas
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!