What is the mass in grams of 150 x 10^12 iron atoms, each having a mass of 56 u?

2 answers:

5 0

<span>If we divide the number of Fe atoms (150x10^12) by Avogadro's Number (6.022x10^23) we get the number of moles of Iron. This value comes out to be 2.49x10^-10. If we multiply the number of moles by the molar mass of iron (55.86 grams) than we get a value that comes out to be 1.39x10^-8 grams or 13.9 nanograms.</span>

Gala2k [10]4 years ago

5 0

The answer is 13.9 nanograms.

You might be interested in

A student mixes sugar and water until the sugar dissolves. This an example of a<br> HELP PLS !!

murzikaleks [220]

Answer:

The sugar water mix is a mixture.

6 0

3 years ago

Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°C. None of the above pairs will

Alla [95]

Answer:

Only $Fe^{3+}+Mg$ gives spontaneous reaction.

Explanation:

A redox reaction will be spontaneous if standard reduction potential ( $E^{0}$ ) of the reaction is positive. Because it leads to negative standard gibbs free energy change ( $\Delta G^{0}$ ), which is a thermodynamic condition for spontaneity of a reaction.

$E^{0}=E^{0}(reduction)-E^{0}(oxidation)$

Where $E^{0}(reduction)$ and $E^{0}(oxidation)$ represents standard reduction potential of reduction half cell and standard reduction potential of oxidation half cell.