Question

You have been working to develop a new fictitious compound in the lab. Determine the amount in units of moles​ [mol] of 40 grams​ [g] of this compound. The compound has the​ formula: Upper X 5 Upper Y 7 Upper Z 6​, where the components are​ X, amuequals50​; ​Y, amuequals45​; ​Z, amuequals10.

Answer 1

Answer : The moles of given compound is, 0.064 mole

Explanation : Given,

Mass of given compound = 40 g

Atomic mass of X = 50 amu

Atomic mass of Y = 45 amu

Atomic mass of Z = 10 amu

First we have to calculate the molar mass of given compound.

The given compound formula is, $X_5Y_7Z_6$

Molar mass of $X_5Y_7Z_6$ = (5 × Atomic mass of X) + (7 × Atomic mass of Y) + (6 × Atomic mass of Z)

Molar mass of $X_5Y_7Z_6$ = (5 × 50) + (7 × 45) + (6 × 10) = 625 g/mol

Now we have to calculate the moles of given compound.

$\text{Moles of given compound}=\frac{\text{Mass of given compound}}{\text{Molar mass of given compound}}$

$\text{Moles of given compound}=\frac{40g}{625g/mol}$

$\text{Moles of given compound}=0.064mol$

Thus, the moles of given compound is, 0.064 mole