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Atomic Mass

What is the a...

Question

What is the atomic mass of Calcium?

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Solution

Atomic mass:
It gives the mass of the atom.
Each element has its own atomic mass.
The unit of atomic mass is u. Here, u represent a unified mass.
Atomic mass of Calcium $(Ca)$ :
The symbol for Calcium is $Ca$ .
The atomic mass of Calcium is $40.078 u$ .

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Q. What is the atomic mass (u) of calcium?

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Q. The atomic mass of calcium of 40u. What will be the number of calcium atoms in 0.4u of calcium

40 g

of calcium was extracted from

56 g

of calcium oxide
(Atomic mass of

C a = 40, O = 16

)
i) What mass of oxygen is there in

56 g

of calcium oxide?
ii) How many moles of oxygen atoms are there in this?
iii) How many moles of calcium atoms are there in

40 g

of calcium?
iv) What mass of calcium will be obtained from

1000 g

of calcium oxide?

Q. What is the molecular mass of calcium hydroxide? (Atomic mass of Ca=40 u, O=16 u and H = 1 u)

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