Question

answer 2 and 3 question in the image

Answer 1

Answer:

3 answer is Alo3

and nacl

Answer 2

2.

MASS OF ONE MOLE OF OXYGEN = 1(16)=16g

SO,

MASS OF 2 MOLES OF OXYGEN = 2(16)=32g

NOW,1 MOLE CONTAINS 6.023×10²³ PARTICLES

SO,

2 MOLES CONTAIN 2(6.023×10²³)PARTICLES

3.

+1 -1

Na Cl

(HERE I WROTE THE RESPECTIVE CHARGES OF ELEMENT ABOVE THE ELEMENT FOR CRISS-CROSS)

SO WHILE WRITING THE COMPOUND FORMULA WE HAVE TO IGNORE THE SIGNS

[NaCl]

+3 -2

Al O

[Al2o3]