Question

36. (a) Find the mass of 10 moles of sodium sulphate (Na2S04).
(b) Calculate the number of molecules in 8 g of oxygen gas.
(c) Convert 22 g of CO2 into moles.
(1+2+2) 5
(5 Points)
Enter your answer​

Answer 1

Answer:

77.6 will be the answer

Answer 2

answers

(a) molar mass of Na2SO4 =2×23+32+4×16=142 g/mol

mass = molar mass × mole of Na2SO4

mass= 10 ×142

mass = 1420g

(b) The molar mass of oxygen gas is 32g/mol,

n=

32g/mol

8g

=0.25mol

n=

6.022×10

23

N

a

N

a

=1.55×10

23

(c)Atomic masses : C=12u,O=16u) So, the mass of 1 mole of carbon dioxide is 44 grams. Thus, 22 grams of carbon dioxide are equal to 0.5 mole.

hope it will help u