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
dybincka [34]
3 years ago
8

A chemical reaction gives off 1,500 kj of heat energy. about how many calories is this? (1 calorie = 4.18 joules)

Chemistry
2 answers:
Greeley [361]3 years ago
6 0
1500kj = 15x 10^5 j
1 calorie = 4.18 j
(15 x 10^5)/4.18= 3.58 x 10^5

Answer is a
Zanzabum3 years ago
3 0

Answer is: a. 3.6 x 10^5 calories.  

E = 1500 kJ; heat energy.

E = 1500 kJ · 1000 J/kJ.

E = 1500000 J = 1.5·10⁶ J.

E = 1.5·10⁶ J ÷ 4.18 J/cal.

E = 3.6·10⁵ cal.

Calorie (cal), or small calorie, is the amount of energy needed to heat one gram of water by one degree Celsius.

One small calorie is approximately 4.18 joules.

A calorie is a unit of energy.


You might be interested in
Any substance which yields a hydrogen ion when placed in a water solution is call an——-
lidiya [134]

it is A Acid

Explanation : Any substance that yields a hydrogen ion when placed in a water solution is called an acid. According to Arrhenius theory of Acids and Bases, Acids are those substances which on dissociation in solution generates ions. Whereas a Base is a substance that dissociates in the solution to produce ions.

6 0
3 years ago
Examples of pure and impure substances
erastova [34]
Pure- table salt
Impure- vegetable oil
8 0
3 years ago
Read 2 more answers
Chemical formula of tetraphosphurus octasulfide
Firlakuza [10]

Answer:

Explanation: Does any of this look right? To be honest I just looked it up.

6 0
3 years ago
What does Gravity means<br><br><br> Please it’s due today need help please
masya89 [10]

Answer: The force of attraction occurring between two masses.

7 0
2 years ago
Read 2 more answers
Hydrazine, N2H4, is a corrosive liquid used in rocket and jet fuels. Ammonia, NH3, is a gas that dissolves in water to form a so
Lyrx [107]

OK in the case of hydrazine  14 grams of nitrogen  combine with 2 gram of hydrogen and with ammonia 14 grams combine with 3 grams of hydrogen.

Ratio 2:3
5 0
3 years ago
Other questions:
  • Which condition would lower the salinity of ocean water? A. high rates of evaporation B. freezing of glaciers C. extremely hot w
    5·2 answers
  • luminum and oxygen react according to the following equation: 4Al(s) +3O2(g) --&gt; 2Al2O3(s) What mass of Al2O3, in grams, can
    7·1 answer
  • Which has a larger density a large brick or a small brick? why?
    7·2 answers
  • BRAINIEST TO THE ONE WHO ANSWER THIS
    8·2 answers
  • How many orbitals are completely filled
    11·1 answer
  • How do we exist? What does scientific evidence suggest about the start of the universe?
    14·1 answer
  • Problem PageQuestion While ethanol is produced naturally by fermentation, e.g. in beer- and wine-making, industrially it is synt
    14·1 answer
  • What are the parts of this water wheel system?Label the water wheel to show the matter and forms of energy that flow through the
    10·1 answer
  • 0.352 g sample of a diprotic acid is dissolved in water and titrated with 0.150 M NaOH.0.150 M NaOH. What is the molar mass of t
    14·1 answer
  • A sample of iron (III) chloride has a mass of 26.29g. How many moles would this be?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!