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
kaheart [24]
4 years ago
6

Fireworks are chemical reactions that release energy. Which of these phenomena are caused by chemical reactions that release ene

rgy? If you’re not sure, make a guess. Muscles work to perform a task. Fuel burns and heats the surroundings. A battery supplies current to a device. A car's air bag expands by igniting a chemical.
Chemistry
2 answers:
Gemiola [76]4 years ago
6 0

All the answers are correct.

Annette [7]4 years ago
4 0
I think it is either the second or third one.
You might be interested in
if a geologist found two fossils of different species buried next to each other in a rock layer, he or she might hypothezise tha
vaieri [72.5K]
This would be true.

The reason why this answer would be true is because a fossil's position in the rock layers determine how long they died and were preserved. If the fossils were right next to each other, then that means both organisms were preserved at the same time.
5 0
3 years ago
The coriolis effect happen when
Schach [20]
When global winds, ocean currents, and other forces move freely across the earths surface.
3 0
3 years ago
Who answers the three economic questions in a market economy? How is this different from command economy?
Natali [406]

Answer:

Market economies are characterized by their free markets. Examples are the United States and the United Kingdom.

  • That's pretty clear. What it means is that they trust in the free market and its operation to answer the questions of what to produce, how much to produce, and for whom.

Command economies are characterized by their control of markets. Examples are China and North Korea.

  • They rely on the government, <em>not the free market itself, </em>to control what should be produced. This makes for a more strict system that can pay off in the long run, but can also run the risk of being heavy-handed.

6 0
4 years ago
Which of the following is a physical property of a substance?? A. Combustion B. Corrosion C. Tendency to tarnish D. Solubility
Fofino [41]
A physical property does not change the substance. 

Solubility would be the answer since all of the rest are changing the substance. They all deal with bonds except solubility. 

Answer: D. Solubility

6 0
3 years ago
Read 2 more answers
Determine the molecular formula of a compound that is 49.48% carbon, 5.19% hydrogen, 28.85% nitrogen, and 16.48% oxygen. the mol
Softa [21]
To determine molecular formula, we first need to find out its empirical formula,
Carbon. Hydrogen. Nitrogen. Oxygen
Mass. 49.98g. 5.19g. 28.85g. 16.48g
Mole. 4.165. 5.19. 2.06. 1.03
Divide 4. 5. 2. 1
by
smallest
So by comparing the mole ratio from the table above, i hope u understand the table
The empirical formula is C4H5N2O
given molecular mass = 194.19g
so
(C4H5N2O) n= 194.19
(48+5+28+16)n=194.19
n= 2
molecular formula = C8H10N4O2
7 0
3 years ago
Other questions:
  • A student carries out the precipitation reaction shown below, starting with 0.030 moles of calcium nitrate. The final mass of th
    12·1 answer
  • What CPT code is reported for a percutaneous needle biopsy of mediastinum?
    13·2 answers
  • Use Gay-Lussac Law to solve. When the pressure of a balloon starts at 7.5 atm and the temperature surrounding the balloon goes f
    5·1 answer
  • How much of a 15.0M stock solution do you need to prepare 250ml of a 2.35ml hf solution?
    7·1 answer
  • You go out to dinner and the bill comes to $ 26.37. How much should you tip if you want the tip to be 19.0 % of the bill?
    11·1 answer
  • When carbonates react with acids fizzing occurs.what does the fizzing indicate?​
    10·1 answer
  • Peat, which is formed when decayed moss is compressed over time, is used for which purpose?
    10·2 answers
  • Which of the following is the correct Lewis dot diagram for Br found in LiBr.
    5·2 answers
  • you find 13406190 pennies. how many dollars did you actcually find? if each penny weighs 4 grams, how much does all of it weigh
    5·1 answer
  • Do you notice a pattern in the charge for elements in each group? Explain.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!