Hello!
To find the mass of helium, we need to multiply the total moles by the mass of helium. We are given 2.714 moles of helium, and the mass of helium is about 4.00 grams. Now, we multiply the two values together to get the grams.
2.714 moles x 4.00 grams = 10.856 grams
According to the number of significant figures, 2.714 moles of helium has a mass of 10.9 grams (exact value: 10.856 grams).
The period is the end of the sentence!!!
C. the number of protons and neutrons an element has in its nucleus
It well be 9025 because it will dissolve in 0.8 hcl soluiton
Answer:
not 100% sure but I think it's unbalanced chemical
