Doctors recommend that men get 11 g of zinc daily. How many moles of zinc are in 11 g?
0.20 moles
17 moles
1.70 moles
0.17 moles
mols = grams/atomic mass
11 g Zn sounds high to me but then I'm not an MD. Are you sure that isn't 11 mg?
Doctors recommend that men get 11 g of zinc daily. How many moles of zinc are in 11 g?
it rounds to 0.17 moles
To find out how many moles of zinc are in 11 g, we need to use the molar mass of zinc. The molar mass of zinc is 65.38 grams per mole.
To calculate the number of moles, we can use the formula:
moles = mass / molar mass
In this case, the mass is 11 g, so we can substitute these values into the formula:
moles = 11 g / 65.38 g/mol
Calculating this value gives us approximately 0.168 moles.
However, we need to round the answer to the appropriate number of significant figures. The 11 g value has 2 significant figures, so we round the answer to 2 decimal places.
The rounded value is 0.17 moles.
Therefore, the correct answer is 0.17 moles.