Question

0.25 mole of P4O10 contains a)40 grams atoms of Oxygen. b)2.5 grams atoms of Oxygen. c)2.1 grams atom of phosphorus. d)10 grams of atom of oxygen. who will give correct answer in 5 minutes I will mark them as branilist​

Answer 1

Answer:

a) 40 g atoms of oxygen

Explanation:

Total molecular mass of oxygen atom in P4O10 is 160 u

No. of mole = mass of oxygen/ total molecular mass of oxygen

0.25 = x/160

0.25*160 = x

40 = x

Mass of oxygen in P4O10 is 40 g

Answer 2

Given - Number of moles - 0.25 mole

Chemical formula of compound - P4O10

Find - Number of gram atoms of oxygen.

Solution - Atomic mass of oxygen - 16 gram.

1 mole of P4O10 contains 10 oxygen atoms which will weigh = 16*10 = 160 gram.

So, 1 mole of P4O10 contains 160 gram atoms of oxygen.

0.25 mole will contain - 160*0.25 = 40 gram

Hence, 0.25 mole of P4O10 contains a)40 grams atoms of Oxygen.