Two moles of MgsO4•7H2O contain ___ grams of MgSO4•7H2O

492.6g

Explanation:

Given parameters:

Number of moles of MgSO₄.7H₂O = 2moles

Unknown:

Mass = ?

Solution:

To find the mass of this compound;

       Mass  = number of moles x molar mass

Molar mass of MgSO₄.7H₂O = 24.3 + 32 + 4(16) + 7[2(1) + 16]

                                                = 246.3g/mol

Mass  = 2 x 246.3 = 492.6g

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.