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
Fynjy0 [20]
4 years ago
8

How are physical and chemical changes different

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

Answer:

physic

Explanation:

physical chnages are chnages to the appearance

chemical chnages are chnages like

color temperature chnaging fromna gas to a liquid etc

mariarad [96]4 years ago
3 0

Answer:

Explanation:

Physical changes do not change the properties of the initial substance. Physical changes are temporary. For eg if you boil water, it turns into vapor. It's chemical composition is still H2O but now its just in gas form instead of liquid but overtime that gas will condensate into water. SO physical changes are reversible most of the times.

Chemical changes change the properties of initial substance. Like burning wood, you can't really reverse this reaction because you can't go from coal to wood, its permanent change. So chemical changes are permanent changes. Like souring milk, acid-base reactions, rotting banana etc.

You might be interested in
The Earth has how many satellites?<br> (i know this is not chemistry theres no science one)
Shtirlitz [24]
3,000 operational satellites currently orbiting earth
3 0
3 years ago
Read 2 more answers
the chemical compound C2F4 is used to make PTEE (Teflon). How manyC2F4 molecules are in 485 kilograms of this material?
monitta

Answer:

molecules=2.92x10^{27}moleculesC_2F_4

Explanation:

Hello,

In this case, we use the Avogadro's number to compute the molecules of C2F4 whose molar mass is 100 g/mol contained in a 485-kg sample as shown below:

molecules=485kgC_2F_4*\frac{1000gC_2F_4}{1kgC_2F_4} *\frac{1molC_2F_4}{100gC_2F_4}*\frac{6.022x10^{23}molecules C_2F_4}{1molC_2F_4}  \\\\molecules=2.92x10^{27}moleculesC_2F_4

Best regards,

5 0
3 years ago
What protein molecules does DNA wrap around to form a nucleosome
Delvig [45]

Answer:

Histone proteins.

Explanation:

Histones are known as the special type of proteins which are +ve charged and low molecular in weight. They are highly basic proteins and containing basic amino acids such as arginine and lysine. Histones are +ve charged proteins and DNA is -ve charged in nature, due to the presence of phosphate groups in DNA backbone, histones bind with DNA very tightly and form a complex known as Nucleosome.

The Nucleosome is known as the fundamental unit of DNA packaging which is composed of an Octameric core of histone proteins (two each of histones H2A, H2B, H3, and H4) around which the double helix of DNA is wrapped.

4 0
3 years ago
Which sentence describes a star clusters ? Check all that apply
Sholpan [36]
B. stars form large groupings
3 0
3 years ago
Read 2 more answers
Natalia wants to test the effect of temperature on the rate of
Dimas [21]

Answer:

The independent variable is the effect of tempeture on the rate of photosynthesis

5 0
3 years ago
Other questions:
  • Fluorine (F) and bromine (Br) are in the same group on the periodic table. How do atoms of these elements compare when they form
    7·2 answers
  • What is the difference between physical and chemical change in chemistry?
    5·2 answers
  • The first plant to grow in new environments are usually
    12·1 answer
  • Electrophilic addition of HBr to alkenes yields a bromoalkane. The reaction begins with an attack on the hydrogen of the electro
    6·1 answer
  • Red blood cell count typically goes down as result of training
    10·1 answer
  • Describe how atomic emission spectrums came about, and what they say about atoms/electrons.
    9·1 answer
  • How many moles of silicon (Si) are in 1.50 x 1023 atoms Si?
    7·1 answer
  • Someone please help me with the two I got wrong
    10·2 answers
  • A sample of gas exhibits ideal behavior and occupies a volume of 350. mL at 25.0C and 1.00atm. How many moles of gas are present
    8·1 answer
  • Which of the following is not part of a flower pistil
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!