will you please help me in this problem
Nitya Arora
acc = Queenk224
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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:
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
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