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
ch4aika [34]
3 years ago
6

How is a chemical change different from a physical change?

Chemistry
1 answer:
DaniilM [7]3 years ago
6 0
A physical change<span> in a substance doesn't </span>change<span> what the substance is. In a </span>chemical change<span> where there is a </span>chemical reaction<span>, a new substance is formed and energy is either given off or absorbed.</span>
You might be interested in
10. A water molecule is made up of one oxygen atom and two hydrogen atoms. Why is water
Norma-Jean [14]
Its either C or D I’m stuck on this.
6 0
2 years ago
Read 2 more answers
Which atom has the smallest atomic radius between cesium, potassium, rubidium, and francium?
wel
Ur answer is going to be francium
3 0
3 years ago
To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an empty 2.2-L bulb, then filled
Ber [7]

Answer:

N2

Explanation:

We use the ideal gas equation to calculate the number of moles of the diatomic gas. Then from the number of moles we can get

Given:

P = 2atm

1atm = 101,325pa

2atm = 202,650pa

T = 27 degrees Celsius = 27 + 273.15 = 300.15K

V = 2.2L

R = molar gas constant = 8314.46 L.Pa/molK

PV = nRT

Rearranging n = PV/RT

Substituting these values will yield:

n = (202,650 * 2.2)/(8314.46* 300.15)

n = 0.18 moles

To get the molar mass, we simply divide the mass by the number of moles.

5.1/0.18 = 28.5g/mol

This is the closest to the molar mass of diatomic nitrogen N2.

Hence, the gas is nitrogen gas

7 0
2 years ago
Balance the following chemical equation by providing the correct coefficients HBr+Ba(OH)2 ———— BaBr2+H2O
stealth61 [152]

Answer:

2HBr + Ba(OH)2 = BaBr2 + 2H20

4 0
3 years ago
Are alchemy and chemistry the same
Anit [1.1K]

Are alchemy and chemistry the same: No

<u>Explanation:</u>

Alchemy and chemistry differ from each other. Their main difference lies in the concepts that they are based on. Alchemy has the base of viewing the reality of nature supernaturally. Chemistry has a base of viewing the reality in a natural way.

Protoscience is the name given for Alchemy. This is because that alchemy usually focuses on the traditional things like procedures and  terminologies. Chemistry always focuses on the matter and their transformations. The matter and its transformations are dealt with chemistry.

5 0
3 years ago
Other questions:
  • Dr. Hakoda is studying tsunamis—large waves that can reach heights of 1,700 feet. Tsunamis are often caused when large chunks of
    8·2 answers
  • If Plank's constant is 6.6 x 10(-34) J/Hz, then what is the approximate frequency of a photon having an energy of 3 x 10(-19) Jo
    11·1 answer
  • What type of experiment is based on a comparison between a control group and an experimental group ?
    13·1 answer
  • The homogeneous, reversible exothermic, liquid-phase reaction A ↔ R is being carried out in a reactor system consisting of two i
    5·1 answer
  • Please Help Me! Question is on link down below!
    7·1 answer
  • Which particle has an electronic structure of 2.8.8?
    12·2 answers
  • How many moles of chlorine gas are in 1.2m^3 at room temperature and pressure?
    5·1 answer
  • H-h+cl+cl____2h-cl... calculate the energy needed to break the bond​
    11·1 answer
  • Which choice represents a compound?Required to answer. Single choice.
    10·1 answer
  • When light waves pass through solids, the speed of the wave ___________.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!