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Alekssandra [29.7K]
3 years ago
14

What is the total number of protons in the nucleus of calcium -42?

Chemistry
1 answer:
amm18123 years ago
5 0
Since the atomic number of calcium is 20. The number of protons is also 20.
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What is the molecular geometry of a molecule made of two atoms that share one pair of electrons and have no lone electrons pairs
morpeh [17]

Answer:

linear

Explanation:

Actually I consulted various sources too and that was the most sought answer,I just decided to answer you before studying it too

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Veronika [31]

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3 0
3 years ago
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A force of 17 N is exerted on an area of 0.20 m2. What is the pressure?
solmaris [256]
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5 0
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Nikolay [14]
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A sample of water is heated from 60.0 °C to 75.0°C by the addition of 140 j of
kupik [55]

Mass of the water : 2.23 g

<h3>Furter explanation</h3>

Heat

Q = m.c.Δt

m= mass, g

c = heat capacity, for water : 4.18 J/g° C.

ΔT = temperature

Q= 140 J

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mass of the water :

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5 0
3 years ago
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