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Artyom0805 [142]
2 years ago
11

The nucleus of an atom is

Chemistry
2 answers:
Scorpion4ik [409]2 years ago
7 0

Answer:

The nucleus is composed of protons and neutrons. A nucleus usually refers to the central core of something.

Explanation:

Brilliant_brown [7]2 years ago
7 0

Answer:

a. The central core and is composed of protons and neutrons.  

Explanation:

A nucleus of anything is a central core. The nucleus of an atom is composed of protons and neutrons.

b. is wrong. Except for H, the number of neutrons is always equal to or greater than the number of protons.

c. and d. are wrong. The nucleus is positively charged.

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Water is known as the universal solvent. One reason water makes a good solvent is because it is composed of polar molecules. Wha
Flauer [41]

Answer: Option (C) is the correct answer.

Explanation:

A water molecule is made up of two hydrogen atoms and one oxygen atom. Its molecular formula is H_{2}O.

It is known that hydrogen is electropositive in nature whereas oxygen is electronegative in nature. Therefore, oxygen will pull the electron of hydrogen towards itself as a result, there will be formation of partial positive charge on hydrogen and partial negative charge on oxygen atom.

Thus, the water molecule becomes polar. So, we can conclude that water molecule is a polar molecule because water molecules have a positive charge on one end and a negative charge on  the other.

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6 0
3 years ago
Define physical properties, and give two types of physical properties in your answer. Thx so much!
Elza [17]

Answer:

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6 0
2 years ago
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28 mL of 0.10 M HCl is added to 60.0 mL of 0.10 M Sr(OH)2. Determine the concentration of OHin the resulting solution.
serg [7]

Answer:

Explanation:

Sr(OH)₂.+ 2HCl = SrCl₂ + 2H₂O

Moles of HCl in 28mL of .10 M HCl = .028 x .1 = .0028 moles .

Moles of Sr(OH)₂ in 60mL of .10 M Sr(OH)₂ = .060 x .1 = .0060 moles

2 moles of HCl  reacts with 1 mole of Sr(OH)₂

.0028 moles of HCl  reacts with .0014  mole of Sr(OH)₂

moles of Sr(OH)₂ remaining = .0060 - .0014 = .0046 moles .

Sr(OH)₂  = Sr⁺  +  2OH⁻

1 mole                  2 mole

.0046                    .0092

Total volume of solution = 88 mL .

88 mL of solution contains .0092 moles of OH⁻

concentration of OH⁻ = .0092 / .088

= .1045 M  .

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