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aleksley [76]
4 years ago
5

How many electrons will a calcium (ca) atom gain or lose in forming an ion?

Chemistry
1 answer:
Yuliya22 [10]4 years ago
4 0
Calcium has an atomic number 20. This means that calcium has 20 electrons.
The electronic configuration of these 20 electrons is as follows: 2,8,8,2

For the calcium to become stable, it should have eight electrons in its outermost energy level.
Based on this, calcium loses two electrons to form an ion and become stable.
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How many milliliters of 0.121 M HCl are needed to neutralize 44.3 mL 0.274 M Ba(OH)2? Write the equation and don't forget to bal
Sergeeva-Olga [200]

Answer:

100 mL is the volume of HCl needed to neutralize the 44.3 of Ba(OH)₂

Explanation:

This is the chemical equation:

2HCl + Ba(OH)₂  →  BaCl₂ + 2H₂O

Formula for neutralization is:

Molarity of acid . Volume of acid = Molarity of base . Volume of base

0.121 . Volume of acid = 0.274 . 44.3

Volume of acid = (0.274 . 44.3) / 0.121 → 100

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List 3 ways how we know plants are alive?
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They use natural resources like sunlight water they need soil water and sunlight to grow the stem should be pliable and firm and will have a green cast on the inside
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How many atoms of Hydrogen H are in 2 molecules of Octane 2C8H18
antiseptic1488 [7]

Answer:

16

Explanation:

2x8

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Describing physical and chemical changes:
svetoff [14.1K]
Physical: The chemist could try to bend it to find out how malleable it is. He could also try to pull it into wires to find out how ductile it is.

Chemical: The chemist could put the metal into contact with other substances to get an idea of how reactive it is, and he could try to burn it and find out how flammable it is.
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4 years ago
What are the values of the solute amount in moles and the solution volume in liters.
worty [1.4K]

Answer:

0.250L of solution. 0.250 moles of solute.

Explanation:

As you can see in the image, there is a beaker with an amount of solution. 1/2L are 500mL and each line of the beaker represents 100mL. That means the volume of the solution is approximately 250mL = 0.250L

Molarity is an unit of concentration defined as the moles of solute per liter of solution. A solution that is 1.000M contains 1.000 moles of solute per liter of solution.

As the volume of the solution is 0.250L, the moles are:

0.250L * (1.000mol/L) = 0.250 moles of solute

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3 years ago
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