What is a formula mass example?

Answer 1

#"Sodium carbonate"# has a formula mass of #105.99*g*mol^-1#. How do we arrive at this figure?

Well we take the weighted sum of the atomic masses involved in the formula, #Na_2CO_3#, and that is..........
#{2xx22.99(Na)+12.011(C)+3xx16.00(O)}*g*mol^-1#
#=105.99*g*mol^-1#.

Did I just know the individual atomic masses off the top of my head, or where did I get them from?

Would you mind clarifying? Is this what you want?

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Answer 2

An example of formula mass is the compound water, which has the chemical formula H2O. The formula mass of water can be calculated by adding the atomic masses of its constituent atoms, which are hydrogen (H) and oxygen (O). The atomic mass of hydrogen is approximately 1.008 atomic mass units (amu), and the atomic mass of oxygen is approximately 15.999 amu. Therefore, the formula mass of water (H2O) is calculated as follows:

(2 * 1.008 amu for hydrogen) + (1 * 15.999 amu for oxygen) = 2.016 amu + 15.999 amu = 18.015 amu

So, the formula mass of water (H2O) is approximately 18.015 atomic mass units.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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