Question

calculate the number of moles in 20g of sodium hydroxide.[NaOH]

Answer 1

Answer:

▶Number of moles in 20g of NaOH = 2.

Step-by-step explanation:

Given that,

• Mass of NaOH = [(23 + (16 × 1)] ▶39 $\mu$

• Mass of one mole NaOH = 20g

As we know that,

Number of moles = Mass of substance / Mass of one mole.

▶Number of moles = 39 / 20

▶${\red{\sf{\underbrace{Number\: of \:moles\: = \:1.95 \:\approx\: 2.}}}}$

Answer 2

Answer:

Number of moles in 20g of NaOH = 2.

Step-by-step explanation:

Given that,Mass of NaOH = [(23 + (16 × 1)]

▶39 Mass of one mole NaOH = 20gAs

we know that,

the number of moles = Mass of substance / Mass of one mole.

▶Number of moles = 39 / 20