Question

Two samples of a compound containing elements a and b are decomposed. the first sample produces 15 g of a and 35 g of

b. you may want to reference ( page 49) section 2.3 while completing this problem. part a the second sample produces 10 g of a and what mass of b? the second sample produces 10 of and what mass of ?

Answer 1

23.33 grams of element b was produced by second sample of the compound on decomposition.

Step-by-step explanation:

Sample-1 of compound containing ab gives :

Mass of a = 15 g

Mass of b = 35 g

Ratio of mass of mass of a to mass of b:

`(15 g)/(35 g)=(3)/(7)`

Sample-2 of compound containing ab gives :

Mass of a = 10 g

Mass of b = x

Ratio of mass of mass of a to mass of b:
`(10 g)/(x)`

Since the both samples are of same compound the ratio of masses will remain same.

`(10 g)/(x)=(3)/(7)`

`x=(70 g)/(3)= 23.33 g`

23.33 grams of element b was produced by second sample of the compound on decomposition.

Answer 2

Answer;

= 23.33 g of B

Solution;

Decomposition gives 15 g of A and 35g of B

Therefore; for every 15/15 = 1 gram of A there are 35/15 = 2.3333 g of B

Hence; If there are 10 g of A, (10*1), there will be;

= 10 × 2.33333 g = 23.33 g

= 23.33 g of B