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
Elza [17]
3 years ago
14

Pure substance can be __ and __

Chemistry
1 answer:
Aleksandr [31]3 years ago
4 0
It can be an element or a compound
You might be interested in
PLEASE HELP!!!!! I need help with this question!
Ivahew [28]

Answer:

Exothermic Reaction

Explanation:

Its a combustion reaction and they are always exothermic in nature.

8 0
3 years ago
What is the volume of 0.5 moles of a gas at 2 atmospheres of pressure and 15°c​
liq [111]

Answer:

6l

Explanation: convert temperature to kelvin by adding 273 and then input the values into the formula with the given constant

2*v=0.5*0.8206*288 then divide both sides by 2 and get the amount in litres which is 6

4 0
3 years ago
Copper(II) nitrate forms a series of hydrates with the formula Cu(NO3)2.xH2O. These hydrates decompose to form copper(II) oxide.
maria [59]

Answer:

One mole is defined as the amount of substance containing as many elementary entities (atoms, molecules, ions, electrons, radicals, etc.) as there are atoms in 12 grams of carbon-12 (6.023 x 1023). The mass of one mole of a substance equals its relative molecular mass expressed in grams. Also spelled as mol.

6 0
3 years ago
_______ reaches the Earth's surface through _______, then turns into _______.
e-lub [12.9K]
The answer is Magma, volcanoes,lava.  Magma<span> reaches the Earth's surface through volcanoes, then turns into lava. .</span>
8 0
3 years ago
Read 2 more answers
Arrange the following which is most reactive to the least reactive when these react in water:
Reika [66]

Answer:

Explanation:

potassium

sodium

lithium

3 0
3 years ago
Read 2 more answers
Other questions:
  • Question 8<br> Review<br> Which metal jis most easily oxidized?
    5·2 answers
  • What is the mass/volume percent concentration of 2.75g of K2SO2 dissloved in 350.0 ml of solution
    9·1 answer
  • Which segement of the heating curve shown above represents an increase in the potential energy, but no change in the kinetic ene
    11·2 answers
  • What is the name of the term that describes the conditions that are kept the same between all groups in an experiment?
    12·1 answer
  • What is the wavelength of a wave with a<br>velocity of 50 m/s and a frequency of 5 Hz?​
    14·1 answer
  • If 100 g of a substance reacts with 70 g of another substance, what will be the mass of the products after the reaction?
    14·1 answer
  • What is the best definition of "thinking at the margin"? *
    5·1 answer
  • 5. Which of the following characteristics in a chemical reaction indicates
    15·1 answer
  • Help quickly pleaaas
    8·1 answer
  • Proteins have many functions in the cell membrane. Which function is NOT related to a protein?a. transportb. membrane fluidityc.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!