Find the number of moles in 400 g of water( H2O)
Answers
Answer:
no. of moles=given mass/molar mass
-----II-----------=400g/18
therefore,no. of moles=22.222
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Answer:
Molecular weight of CaCO 3
=40+12+(3×16)=100g
Given weight of CaCO 3 =400g
As we know that,
No. of moles = Molecular weight
Given weight Therefore,
No. of moles in 400g CaCO 3 = 400/100
=4 moles
The amount of each type of atom or ion in a substance determines its identity in addition to the types of atoms or ions it contains. For instance, both water (H2O) and hydrogen peroxide (H2O2) have molecules that are made up of hydrogen and oxygen atoms. However, a water molecule only has one oxygen atom, whereas a hydrogen peroxide molecule contains two oxygen atoms. As a result, the characteristics of the two substances are significantly different. Modern technology allows us to measure these identifying characteristics directly.
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