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valentinak56 [21]
3 years ago
15

How many neutrons does element X have if its atomic number is 22 and its mass number is 70?

Chemistry
2 answers:
IRINA_888 [86]3 years ago
7 0

It would have 48 neutrons. :)

Alika [10]3 years ago
5 0
<h2>Answer:</h2>

<u>The number of neutrons is </u><u>48</u>

<h2>Explanation:</h2>

As we know that the atomic number is the number of protons. If we subtract the atomic number from the mass number, we can actually find the number of neutrons.

So

Number of neutrons = Mass number - atomic number

Neutrons = 70 - 22 = 48

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How much heat is required to melt 26.0 g of ice at its melting point?
MAXImum [283]

Answer:

Heat required to melt 26.0 g of ice at its melting point is 8.66 kJ.

Explanation:

Number of moles of water in 26 g of water: 26× \frac{1}{18.02} moles

                                                                      =1.44 moles

The enthalpy change for melting ice is called the entlaphy of fusion. Its value is 6.02 kj/mol.

we have relation as:

                                           q = n × ΔH

where:

q  = heat

n  = moles

Δ H  = enthalpy

So calculating we get,

                                        q= 1.44*6.02 kJ

                                        q= 8.66 kJ

We require 8.66 kJ of energy to melt 26g of ice.

                       

8 0
3 years ago
What is the water vapor pressure at 120 degrees f.
alexgriva [62]

Answer:

28.815

Explanation:

5 0
3 years ago
What is the source of energy in nuclear power plants?
Zinaida [17]

Answer:

<h2><em><u>URANIUM</u></em><em><u> </u></em></h2>

Explanation:

What is the source of energy in nuclear power plants?

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4 0
1 year ago
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Metallic Bonding

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8 0
3 years ago
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Kipish [7]
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7 0
3 years ago
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