Volume of 5.2 X 10^26 molecules of CH4

19348.84 L

Explanation:

At STP, we know that;

6.02 × 10^(23) molecules = 22.4 L

Therefore, 5.2 × 10^(26) molecules = 5.2 × 10^(26) × 22.4/(6.02 × 10^(23)) = 19348.84 L

Thus, volume of CH4 with 5.2 X 10^26 molecules is 19348.84 L

they are both synthetic elements

explanation:

d

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3