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ELEN [110]
3 years ago
11

Give an example of a change that would be a chemical change but not a physical change.

Chemistry
2 answers:
Annette [7]3 years ago
4 0

Answer:

digesting food

Explanation:

you dont see it

Mazyrski [523]3 years ago
4 0

Answer:

When you mix two substances and it either smokes, bubbles, gets warmer, or created a new substance.

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What depends on public opinion and support? A. regulations at a local level B. enforcement of laws C. success of a policy D. rev
Nastasia [14]

i believe the answer is success of a policy. if this was correct please mark brainliest and lmk if you have any more questions x

3 0
3 years ago
Which elements are found in the compound NaOH? A. sodium, oxygen, and hydrogen B. nitrogen, oxygen, and hydrogen C. nitrogen, ar
Jet001 [13]
Sodium, Oxygen, and Hydrogen are found in NaOH. Na=Sodium, O=Oxygen, H=Hydrogen.
6 0
4 years ago
2.50 L of a gas at standard temperature and pressure is compressed to 575 mL. What is the new pressure of the gas
vfiekz [6]

Answer:

4.35 atm

Explanation:

According to the information given;

  • Initial volume of the gas, V₁ is 2.50 L
  • Initial pressure of the gas is standard pressure P₁, normally 1 atm
  • New volume of the gas, V₂ is 575 mL

We are required to determine the new pressure of the gas, P₂ ;

To answer the question, we are going to use the Boyle's law, that relates pressure and volume at constant temperature.

According to Boyle's law;

P₁V₁ = P₂V₂

Therefore, to determine the new pressure, P₂, we rearrange the formula;

New pressure, P₂ = P₁V₁ ÷ V₂

Thus;

P₂ = ( 1 atm × 2.50 L) ÷ 0.575 L

    = 4.3478 atm

     = 4.35 atm

Therefore, the new pressure of the gas is 4.35 atm

6 0
3 years ago
Read 2 more answers
What is the relationship between the masses of protons and<br> electrons?
siniylev [52]

Answer:

Proton, stable subatomic particle that has a positive charge equal in magnitude to a unit of electron charge and a rest mass of 1.67262 × 10−27 kg, which is 1,836 times the mass of an electron.

Explanation:

7 0
3 years ago
Write formulas and names for two binary molecular compounds
lyudmila [28]

Answer:

NaCl sodium chloride

HF hydrogen flouride

Explanation:

7 0
3 years ago
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