Balance the nuclear reaction equation for the beta minus decay of iodine-131 by completing the missing numbers
The superscript of xenon is
⇒ 131 .
The subscript of the electron is
⇒ -1.
6.3 ×

In scientific notation, the numerical value without the exponent of 10 must be within the range from 1 to just below 10 (for example, 9.99...). In this case, 6.3 is already within this range, so we just have to multiply it by 1. To get a multiplier of 1 using base 10, we would have to raise 10 to the zeroth power.
3. Ampere is the base unit for electric current.
Molarity is mole divided by volume in litres.
0.5mol divide by 0.5L = 1M
Answer: Option (a) is correct.
Explanation:
Molecules of sugar given = 
According to Avogadro's number it is known that 1 mole contains
.
Therefore, calculate the moles of sugar present in the sample as follows.
Number of moles = 
= 0.25 mol
Thus, the moles of sugar present in the sample is 0.25 mol.