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
Igoryamba
2 years ago
8

What defines an element?

Chemistry
2 answers:
Troyanec [42]2 years ago
7 0

element is made up of only one type of atoms.

it is pure form of matter

example hydrogen, oxygen, carbon etc

Karolina [17]2 years ago
4 0

Answer:

An element is a substance that is made up of only one kind of atom and cannot be broken down into simpler forms by any ordinary chemical means

You might be interested in
Why is there a difference in the conductivity of pure solid NaC1 and of the 1.0 M NaC1 soulution
Basile [38]
That would be cause part of the sodium is pure and that means it still kind of has it properties when it was an element and that its i think.
7 0
3 years ago
A sample of gas in a 14.6 L flexible container is at 25.0oC and 1.00atm. What is the volume of the sample when heated to 220.0oC
inn [45]

Answer: 24.1 L

Explanation:

To calculate the final temperature of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

\frac{V_1}{T_1}=\frac{V_2}{T_2}

where,

V_1\text{ and }T_1 are the initial volume and temperature of the gas.

V_2\text{ and }T_2 are the final volume and temperature of the gas.

We are given:

V_1=14.6L\\T_1=25.0^oC=(25+273)K=298K\\V_2=?\\T_2=220.0^0C=(220+273)K=493K

Putting values in above equation, we get:

\frac{14.6}{298K}=\frac{V_2}{493}\\\\V_2=24.1L

Thus the volume of the sample when heated to 220.0oC and the pressure is constant is 24.1 L

7 0
3 years ago
What changes occur in O + O = O2
ozzi

Answer:

They went from atoms to oxygen molecule.

Explanation:

I'm not sure if this is the answer your teacher is looking for, but in simple terms you had 2 oxygen atoms. Together they make an oxygen molecule, which is the stuff we breathe.

5 0
3 years ago
Suppose you have 1000 lb of waste copper (II) oxide sitting in the basement of your factory. Do you see a problem with sending i
Free_Kalibri [48]

Answer:

Yes.

Explanation:

Yes, we have a problem with sending it to a landfill of copper oxide because it has harmful effect on the health of humans as well as more weight of the copper oxide. Copper oxide usually found in powder form which can easily be inhaled that causes death of the cell due to toxic effect on the mitochondria and lysosomes of the cell. It makes problem of health in carrying the copper oxide from the basement of the factory to the landfill region due to its power form so we can say that it can do problems  to human health while carrying from one place to another.

8 0
2 years ago
Which of the following pairs contains a conjugate acid-base pair?
zzz [600]
Remember that a conjugate acid-base pair will differ only by one proton. 
None of the options you listed are conjugate acid-base pairs as none of them differ only by one proton (or H⁺)
An example of a conjugate acid-base pair would be NH₃ and NH₄⁺NH₃ + H₂O --> NH₄⁺ + OH⁻NH3 is the base, and NH₄⁺ is the conjugate acid
5 0
3 years ago
Other questions:
  •  A reaction container holds 5.77 g of P4 and 5.77 g of O2.
    6·1 answer
  • Explain why salivary amylase would not digest protein
    14·1 answer
  • The following data was collected when a reaction was performed experimentally in the laboratory.
    11·1 answer
  • Explain the relationship between photosynthesis and cellular respiration.<br> 2 point
    6·1 answer
  • What is number one I need help
    9·1 answer
  • Please help me! Two groups of students were tested to compare their speed working math problems. Each group was given the same p
    15·1 answer
  • Individual atoms of each element all have an equal number of protons and neutrons. Only the number of electrons may vary. t or f
    15·2 answers
  • 7. Assume that you have collected 867 L of nitrogen gas at STP. What is the mass of the nitrogen gas?
    15·1 answer
  • Write formulas for compounds formed from these pairs of ions.
    11·1 answer
  • Why is the addition of cold distilled water to the container holding the aspirin you are trying to isolate a necessary step and
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!