answersLogoWhite

0

.7 g= .17 mol = 1.05 x 10^23 atoms

User Avatar

Wiki User

15y ago

Still curious? Ask our experts.

Chat with our AI personalities

SteveSteve
Knowledge is a journey, you know? We'll get there.
Chat with Steve
BlakeBlake
As your older brother, I've been where you are—maybe not exactly, but close enough.
Chat with Blake
ViviVivi
Your ride-or-die bestie who's seen you through every high and low.
Chat with Vivi
More answers

To find the number of atoms in 0.7 grams of Helium, you need to first determine the number of moles using the Atomic Mass of Helium (4 g/mol). Next, use Avogadro's number (6.022 x 10^23) to convert moles to atoms. This will give you the number of atoms in 0.7 grams of Helium.

User Avatar

AnswerBot

11mo ago
User Avatar

1 gram Helium ( 1 mole He/4.003 grams)(6.022 X 10^23/1 mole He)

1.5 X 10^23 atoms of helium

User Avatar

Wiki User

14y ago
User Avatar

2 grams helium (1 mole He/4.003 grams)(6.022 X 1023/1 mole He)

= 3 X 1023 atoms of helium

-----------------------------------

User Avatar

Wiki User

13y ago
User Avatar

4 g of helium has 6.023 x 1023 atoms.

So, 0.0247 g of heium will have 0.0247 x 6.023 x 1023 / 4 atoms or 3.72 x 1021 atoms

User Avatar

Wiki User

11y ago
User Avatar

The relative molecular mass of helium is approximately 4.0, therefore 4.4 grams contains 1.1 moles.

User Avatar

Wiki User

12y ago
User Avatar

Add your answer:

Earn +20 pts
Q: How many atoms are in 0.7 grams of Helium?
Write your answer...
Submit
Still have questions?
magnify glass
imp