Chemistry · Introduction to Fundamental Concepts of Chemistry
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How many moles are there in 60g of sodium hydroxide (NaOH)?
- A
1.5
- B
4
- C
6
- D
8
To find the number of moles in 60 g of sodium hydroxide (NaOH), you can use the formula:
Number of moles=mass(g)/molar mass (g/mol)
Molar mass of NaOH = 23 + 16 + 1 = 40 g/mol
Number of moles= 60/40
=1.5 moles
So, there are 1.5 moles of sodium
This option is correct, using the formula moles = mass / Mr. The mass of NaOH is 60g and the mr = 40. Hence moles = 60/40 = 1.5
This option is incorrect, using the formula moles = mass / Mr. The mass of NaOH is 60g and the mr = 40. Hence moles = 60/40 = 1.5
This option is incorrect, using the formula moles = mass / Mr. The mass of NaOH is 60g and the mr = 40. Hence moles = 60/40 = 1.5
This option is incorrect, using the formula moles = mass / Mr. The mass of NaOH is 60g and the mr = 40. Hence moles = 60/40 = 1.5
Tagged under Chemistry · Introduction to Fundamental Concepts of Chemistry · 2024