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Hitman42 [59]
3 years ago
11

If an atom of tin has a mass number of 118 and an atomic number of 50, how many electrons does it have? 50 168 118 68

Chemistry
2 answers:
Ksju [112]3 years ago
8 0
There are 50 electrons

givi [52]3 years ago
3 0
50 electrons because the number of protons (atomic number) is the same as the number of electrons.
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A 5 mL sample of an unknown liquid is placed into a 250 mL flask that has had all of the air removed. The pressure measured in t
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Answer:

See explanation below

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P₁V₁ = P₂V₂    (1)

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8 0
3 years ago
Read 2 more answers
A potted plant is placed under a grow lamp, which provides 4,200 J of energy to the plant and the soil over the course of an hou
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Answer:

Temperature increase = ΔT = 2.08 °C

Explanation:

Given data:

Energy absorbed by plant = 4200 J

Specific heat capacity of soil = 0.84 J/g°C

Mass of soil = 2400 g

How much temperature increase = ?

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

by putting values,

4200 J = 2400 g ×0.84 J/g°C × ΔT

4200 J = 2016 J/°C  × ΔT

ΔT = 4200 J  / 2016 J/°C

ΔT = 2.08 °C

6 0
3 years ago
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