Which pair shares the same empirical formula? 1. c2h4 and c6h6 2. ch2 and ch4 3.ch3 and c2h6 4. ch and c2h4

- 3. and

Explanations:- An empirical formula is the simplest whole number ratio of the moles of atoms present in the compound.

If we simplify the first par formula then they becomes and CH. This pair does not share the same empirical formula.

Second pair formulas are already simple and could not be further simplify. Since they are different, it is also not the right option.

Fourth pair has CH and . could be simplify to . The two formulas are still different and so it is not the right choice.

The only correct one is third pair as one of them is and other one is could be simplify to . This pair share the same empirical formula, .

d: the voltage of the secondary coil is less than that of the primary coil.

im not suree sorry if wrong

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