Question

so if you have 4 grams of helium how many moles of helium atoms do you have?
helium
2
he
4
atomic number
atomic symbol
atomic mass
mass in grams per mole
periodic table of the elements
2 4.0026
he
helium

Explanation:

Step1: Recall the formula for moles

The formula to calculate the number of moles ($n$) is $n = \frac{\text{mass (in grams)}}{\text{molar mass (in grams per mole)}}$.

Step2: Identify the molar mass of helium

From the periodic table (and the given helium element box), the atomic mass of helium is approximately 4 grams per mole (more precisely 4.0026 g/mol, but for simplicity, we can use 4 g/mol here as the mass given is 4 grams).

Step3: Plug in the values

We have a mass of 4 grams and a molar mass of 4 grams per mole. So, $n = \frac{4\ \text{g}}{4\ \text{g/mol}}$.

Step4: Calculate the result

Dividing 4 grams by 4 grams per mole gives $n = 1\ \text{mole}$.

Answer:

1 mole