Calculate the number of moles in each of the following :

A) 4.5 moles

B) 0.5 moles

Explanation:

A) We want to find the Number of moles in 180 g of Ca.

Now, atomic mass of calcium is M = 40.08 g/mol

Formula for number of moles is;

n = m/M

n = 180/40.08

n ≈ 4.5 moles

B) we want to find the Number of moles in 32g of SO2.

Atomic mass of SO2 = 64.066 g/mol

Similar to answer A above;

n = 32/64.066

n ≈ 0.5 moles

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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pie chart because it is in percents ( % )