Question

will you please help me in this problem


Nitya Arora

acc = Queenk224​

Answer 1

Dobereiner's triad are:- Be(9.0), Mg(24.3) and Ca(40.1)

The avg mass of Be and Ca = (9 + 40.1)/2 = 24.5

which is the mass of Mg.

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Answer 2

Answer:

Area of a Trapezium =

[sum of parallel sides × distance between two parallel sides]

⟹ 162 =

× (23 +b) ×6

⟹ 162 ×2 = (23+b) × 6

⟹ b = 54 −23

⟹ b = 31cm

Step-by-step explanation:

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