Step-by-step explanation:
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➷ volume = length x width x height
Since it is a cube, all sides are equal
volume = 14 x 14 x 14
volume = 
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Answer:
224
Step-by-step explanation:
Substitute x = 4 and y = 2 into the expression and evaluate
7x²y = 7 × 4² × 2 = 7 × 16 × 2 = 7 × 32 = 224
No of molecules = no of moles x avogadro’s number
0.75 ( 6.02 × 10²³) = 4.515 x 10²³ (standard from)