Question

Direction: Solve the following problems. Show your solution.
Use the following:
Avogadro's number: 6.02 x 1023
Atomic Mass: 2 decimal places only (round up to the nearest hundredths) Ex: 2.53
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LEARNING TASK 1:
1. How many numbers of atoms are in 8.50 g of Argon?
2. How many moles of tomatoes are in 3.612 x 1024 tomatoes?​

Answer 1

Answer:

1. Number of atoms = 1.26*10^23 atoms

2. Number of moles = 5.9 moles

Explanation:

1. Number Of Atoms in 8.50g of Argon

Given mass of Argon = 8.50g

Molar mass of Argon = 39.9g

Number of moles = Given Mass/Molar Mass = 8.50/39.9 = 0.21 moles

Number of atoms = Number of Moles*Avogadro's Number

= 0.21*6.022*10^23 = 1.26*10^23 atoms

2. Number of tomatoes = 3.612*10^24

Number of Moles = Number of tomatoes/Avogadro's Number

= 3.612*10^24/6.022*10^23 = 0.59*10 = 5.9 moles