выразить X из формулы A=(X+8)/9

1.Масса атома некоторого химического элемента равна 3.32*10^-25 кг.Какой это элемент?

2. определить средюю квадратичную скорость молекул водорода при температуре 300К..

ПОМОГИТЕ ПОЖАЛУЙСТА((( ПИШИТЕ КАК РЕШИЛИ....

CH4>C2H2>C2H6>C6H6>C6H5I

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