Question

Question:- Calculate the number moles of. 1) 20 gram calcium. 2) 50 gram of caco3. 3) 23 gram of calcium
please answer this question as fast ​

Answer 1

Explanation:

no.of moles = given mass / molecular mass......

(a)- no. of moles = 20/ 40

= 1/2 ...........

(b)- Calculate atomic mass of calcium carbonate...

• 40+12+48
• = 100 gm ..

• now, 1mole = 6.022*10 power 23

3.011* 10 power 23 = 1 / 6.022*10 power 23 * 3.011*10^

= 1/2 moles ... Answer...,.....

(c)- no. of moles = given Mass/ molecular mass

no.of moles = 23/ 40.....

hopefully it will work....☺️☺️☺️☺️

Answer 2

answer:

1. 0.5mole 2. 0.5 mole 3. 0.63mole

explaination:

n= m/M where n= no.of moles , m= given mass ,M=molar mass