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asambeis [7]
3 years ago
12

Iron is a :A. substanceB. heterogenous mixtureC. homogenous mixture​

Chemistry
1 answer:
wlad13 [49]3 years ago
4 0

Answer:

a: iron is a substance

Explanation:

because its hard and brittle and classified as a metal

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The molar mass of iron(Fe) is 55.8 g/mol. what is the mass in grams of 2.25 moles of iron?
AnnyKZ [126]

Try this solution:

if 1 mole is 55.8 gr., then 2.25 moles the mass should be 55.8*2.25=125.55 gr.


Answer: 125.55 gr.

7 0
3 years ago
An atom has three full orbitals in its second energy level.
rewona [7]

Answer:

6

Explanation:

The maximum number of electrons in the orbitals of sub-levels are given as:

   for s-sublevel we have two electrons and one orbital

        p-sublevel we have six electrons and three orbitals

        d-sublevel we have ten electrons and five orbitals

       f- sublevel we have fourteen electrons and seven orbitals

The second energy level is represented by the p-sub-level and it will accommodate 6 electrons.

8 0
3 years ago
In this lab, you will do experiments to identify types of changes. Using the question format you learned (shown above), write an
Vlad1618 [11]

Answer:

How can you distinguish a physical change from a chemical change?

Explanation:

4 0
3 years ago
Question 1 (1 point)
Colt1911 [192]

Answer:

  1. Both are made up of two substances that are not chemically combined.
  2. oxygen (O2)
  3. carbon dioxide (CO2 )
  4. air (N2 mixed with O­2 and CO2)
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Explanation:

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What type of energy source does electrolysis use?
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Answer:

Explanation: Electrolysis uses DC electricity as a energy source.

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4 years ago
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