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
NISA [10]
3 years ago
5

Please answer asap!

Chemistry
1 answer:
hram777 [196]3 years ago
4 0
1.) A compound is a thing that is composed of two or more (separate) elements.

2.) A compound cannot be separated easily, while its properties differ from where it originates from. It also is formed from chemical reactions.

3.) A pure substance, also known as chemical substance, is a material with constant composition and consistant properties.

4.) If a substance is not a pure substance, then it is an impure substance.

Hope this helped. :)
You might be interested in
What is the frequency of radiation whose wavelength is 2.25 X 10^-5cm?
Semenov [28]

Answer:

1.25 x 10^15Hz

Explanation:

c = frequency x wavelength

c is the speed of light, which is equal to 3.00 x 10^8 m / s

frequency = c /wavelength

= (3.00 x 10^8m /s) / (2.40 x 10^-5 cm x 1 m /100cm)

= (3.00 x 10^8 m/s) / 2.40 x 10^-7m

= 1.25 x 10^15/s 1 / s = 1Hz

So, the Frequency = 1.25 x 10^15Hz

I hope this helped :)

3 0
3 years ago
Please help!!!!!! BRAINLIEST to right answer! :))
notsponge [240]

Explanation:

d. endothermic change as

heat is added to solid ice to change it to liquid water

6 0
3 years ago
At sea level, a kilogram welghs approximately<br> 2 pounds<br> 10 pounds<br> 5 pounds<br> 1 pound
Vedmedyk [2.9K]

Answer:

1 kilogram weight at sea level would be the equivalent of  2 pounds.

Explanation:

5 0
3 years ago
Student follow up
sleet_krkn [62]

Answer:

Magnesium and calcium belong to the second group i. e. alkaline earth metals. They are known as earth metals because they are extracted from the earth. They are very reactive elements. Their reactivity increases when we go from top to bottom because the outermost electrons goes farther from the nucleus i. e. atomic radius increases so less energy is needed for its removal.

8 0
3 years ago
To start the chemical reaction, what must happen between the enzyme and the substrate?.
yaroslaw [1]
The enzyme must attract substrates to its active state.
At the end of the reaction, products dissociate from the surface of the enzyme
6 0
2 years ago
Other questions:
  • HYDROGEN PEROXIDE WITH CONCENTRATION OF
    5·1 answer
  • How many grams of N2 are required to produce 240.0g NH3?
    11·2 answers
  • Separate this redox reaction into its balanced component half-reactions. What is the oxidation and reduction half reactions
    12·2 answers
  • Which of the following is a example of an inherited behavior
    12·1 answer
  • Write the isotope notation for the following isotope: copper-63, copper-65, magnesium-24, magnesium-25, magnesium-26, lithium-6,
    15·1 answer
  • Please...help!
    10·1 answer
  • I need help with these
    13·1 answer
  • 6. How many electrons will an iodine atom donate or accept, based on its number of valence electrons?
    9·1 answer
  • Help me ples HELP HELP HELP HELP HELP
    9·1 answer
  • Why does it take less
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!