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What is the total number of molecules of hydrogen in 0.25 mole of hydrogen gas (H_2)?
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2. Atoms & Elements
Mole Concept
Scelta multipla
How many moles of beryllium (Be) are present in 1.00 g of the element? (Atomic mass of Be = 9.01 g/mol)
A
0.0909 mol
B
0.111 mol
C
9.01 mol
D
0.00901 mol
Guida verificata passo dopo passo1
Identify the given information: mass of beryllium (Be) is 1.00 g, and the atomic mass of Be is 9.01 g/mol.
Recall the formula to calculate moles from mass: \(\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}\).
Substitute the given values into the formula: \(\text{moles of Be} = \frac{1.00\ \text{g}}{9.01\ \text{g/mol}}\).
Perform the division to find the number of moles (do not calculate the final value here, just set up the expression).
Interpret the result as the amount of substance in moles corresponding to 1.00 g of beryllium.
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