I don't have a good calculator, but i'll talk you through (will actually benefit you to do it yourself, this will come back to bite you if you don't learn it).
Avagadros number is no. molecules per mole. 5.88x1028 / avagadros number gives your amount of moles. Moles / molecular weight gives weight
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To calculate the weight of FeCl3 in grams, you need to know the molar mass of FeCl3. The molar mass of FeCl3 is approximately 162.2 g/mol. Using this molar mass and Avogadro's number, you can determine that 5.88 x 10^28 molecules of FeCl3 weigh approximately 9.73 x 10^6 grams.
There are 3 atoms in a formula unit of FeCl3 1 of iron and 3 of chlorine.
An Expo marker typically weighs around 10 grams.
Maltose provides approximately 387 grams of carbohydrates per 100 grams.
There are 4 elements in FeCl3: iron (Fe) and three chlorine atoms (Cl).
A typical chicken stock cube weighs around 10 grams.