Which has more atoms lead or helium?
Helium has the most number of mol out of all the options and will thus have the highest number of atoms. Look up the atomic weight (in grams per mole) of each of these 5 elements, and divide the given mass of the element by its atomic weight.
Which weighs more a mole of lead or a mole of iron?
One mole of any substance, by definition, is equal to Avogadro’s number, or 6.022 x 10^23 atoms of that substance. … This makes intuitive sense since iron is the lighter of the two metals and therefore will have more atoms in 2 grams to equal the same weight of the heavier element lead.
Why does a mole of helium weigh more than a mole of hydrogen?
One mole of hydrogen atoms will weigh 1.01 grams. Each hydrogen atom consists of one proton surrounded by one electron.
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Molar mass.
| Mole/weight relationship examples using helium | ||
|---|---|---|
| moles helium | # helium atoms | grams helium |
| 1/4 | 1.505 x 1023 | 1 g |
| 1/2 | 3.01 x 1023 | 2 g |
| 1 | 6.02 x 1023 | 4 g |
What is the moles of helium?
The mass of one mole (molar mass) of helium gas is 4.002602 g/mol .
What is the mass of one lead atom?
202 amu is the average weight of a single lead atom. We can also write 202 grams as the weight of an Avogadro’s number of lead atoms.
How many grams is 5.00 moles of lead?
There are ~1040 g of Pb in 5.00 moles.
What are moles of atoms?
A mole is defined as 6.02214076 × 1023 of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
Which one of the following contains the most moles of oxygen atoms?
formic acid, HCO2H, contains the greatest number of moles of oxygen atoms.