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
FrozenT [24]
3 years ago
12

melting, boiling, and bending are considered physical changes, but burning is a chemical change. explain why this is so.

Chemistry
1 answer:
Naya [18.7K]3 years ago
8 0
<span>So, when you make something boiling or melting, its still the same substance. Water doesn't change into something else, just change its state of matter. When you burn something, one substance reacts with another. For example, when you burn carbon in oxygen, you get carbon dioxide. That's the difference.</span>
You might be interested in
What types of compounds do not dissolve in water?
Nataliya [291]
Oil doesn't dissolve in water, which could be your answer.
8 0
3 years ago
How many Molecules are in 20 grams of CO?
Mademuasel [1]

Answer:

2.74 x 1023 molecules of CO2.

Explanation:

There are 2.74 x 1023 molecules of CO2.

7 0
3 years ago
How many moles of H2 and N2 can be formed by the decomposition of 0.145 mol of ammonia, NH3 ?​
zepelin [54]

Answer:

Explanation:

The moles of H2 and N2 are as follows respectively, 0.3915mol of H2 and 0.1305 mol of N2.

5 0
3 years ago
Calculate the mass of H2OH2O produced by metabolism of 2.4 kgkg of fat, assuming the fat consists entirely of tristearin (C57H11
otez555 [7]

Answer:

2,669.58 grams of water will be produced by metabolism of 2.4 kilogram of fat.

Explanation:

2C_{57}H_{110}O_6+163O_2\rightarrow 114CO_2+110H_2O

Mass of fat = 2.4 kg = 2.4 × 1000 g = 2400 g

1 kg = 1000 g

Molar mass of fat = M

M = 57 × 12 g/mol + 110 × 1 g/mol+ 6 × 16 g/mol = 890 g/mol[/tex]

Moles of fat = \frac{2400 g}{890 g/mol}=2.6966 mol

According to reaction , 2 moles of fat gives 110 moles of water. Then 2.6966 moles of fat will give  ;

\frac{110}{2}\times 2.6966 mol=148.31 mol of water

Mass of 148.31 moles of water ;

148.31 mol × 18 g/mol = 2,669.58 g

2,669.58 grams of water will be produced by metabolism of 2.4 kilogram of fat.

8 0
3 years ago
Exactly one mole of an ideal gas is contained in a 2.00-liter container at 1,000 K. What is the pressure exerted by this gas?
levacccp [35]
Use PV =nRT

so P = nRT/V

= 1 mole(0.08205 L atm/K mol)(1000K) / 2 L

= 41 atm
7 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following is a description of an exothermic reaction?
    10·1 answer
  • 3. Students in a science class in Marfa, Texas, made a poster with a diagram to represent a seasonal change in the Northern Hemi
    14·1 answer
  • How are earthquake seismograms utilized to locate the epicenter of an earthquake?
    11·1 answer
  • The following question was posed on an exam:
    9·1 answer
  • Please Help Me on this!!!! I'll Mark Brainliest!!!!! Thanks!!!!!!
    11·2 answers
  • Which of the following statements are true?
    7·1 answer
  • In a laboratory demonstration, a balloon filled with methane and oxygen was exposed to a flame. The result was a brief, large fl
    9·1 answer
  • Electron configuration worksheet
    13·1 answer
  • Why does the carbon anode burn away in the electrolysis of aluminium chloride?
    9·2 answers
  • The name for a wavelength that is formed<br> from combined waves??
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!