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Aloiza [94]
2 years ago
15

The number of protons plus the number of neutrons equal the ______

Chemistry
2 answers:
NARA [144]2 years ago
7 0
the answer is: Atomic number
Serga [27]2 years ago
4 0
Atomic weight I think this is right
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Mendeleev arranged the known chemical elements in a table according to increasing
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Atomic mass. Which is the number of protons and neutrons combined.
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3 years ago
what is the difference between the number of electrons in an atom of selenium and the number of electrons in an atom of aluminum
igomit [66]

Answer:

The atomic number of Selenium is 34. This means that Selenium possesses 34 electrons.

The atomic number of Aluminium is 13. This means that Aluminium has 13 electrons.

Hence, there is a difference of 21 between the number of electrons in an atom of selenium and the number of electrons in an atom of aluminium.

Selenium has 6 electrons in it's outer most shell whereas aluminium has 3 electrons in its outer most shell. As a result, aluminium will have a greater tendency to lose one of its outer most electrons to become stable.

7 0
3 years ago
What is the total volume occupied by 132 g of CO2 at STP
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132 grams x (1 mol / 44 grams) = 3 moles 
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4 0
3 years ago
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A hot toluene stream, which has mass flow rate of 8.0 kg/min, is cooled by cooling water in a cocurrent heat exchanger; its temp
Alex Ar [27]

Complete Question  

The complete question is shown on the first question

Answer:

a) The duty of the heat exchanger is given as 6.8658 KJ /sec

b) The temperature of the water leaving the exchanger is TOUT = 29.84 ⁰C

c) The log mean difference is given as TZ = 47.317 ⁰ C

d) the UA value is UA = 145.10

Explanation:

The explanation is uploaded on the first and second ,third and fourth image

3 0
3 years ago
17 points if you say hi to claim points ur gay.
nikitadnepr [17]

Answer:

hi

Explanation:

Boiling point

6 0
3 years ago
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