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Chapter 3: Problem 49

How much more massive is an "average" oxygen atom than a He atom? (Use the atomic masses from the periodic table.)

Short Answer

Expert verified
The difference in mass between an average oxygen atom (\( \approx 16 \ \text{amu} \)) and a helium atom (\( \approx 4 \ \text{amu} \)) is approximately \( 12 \ \text{amu} \).

Step by step solution

01

Find the Atomic Masses of Oxygen and Helium

Look at the periodic table and find the atomic masses for oxygen and helium. Oxygen has an atomic mass of approximately 16 amu, while helium has an atomic mass of approximately 4 amu.
02

Subtract the Atomic Mass of Helium from Oxygen

Now, subtract the atomic mass of helium from the atomic mass of oxygen: Difference in mass = Atomic mass of oxygen - Atomic mass of helium
03

Calculate the Difference in Mass

Plug in the atomic masses of oxygen and helium and solve for the difference: Difference in mass = 16 amu - 4 amu = 12 amu The difference in mass between an average oxygen atom and a helium atom is approximately 12 amu.

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Most popular questions from this chapter

Suppose \(12.0 \mathrm{~g}\) of silicon (Si) reacts with \(70.0 \mathrm{~g}\) of oxygen \(\left(\mathrm{O}_{2}\right)\) to give \(25.6 \mathrm{~g}\) of the compound silicon dioxide \(\left(\mathrm{SiO}_{2}\right) .\) In the process, all the silicon gets used up, but some oxygen is left over. (a) For the law of conservation of matter to be obeyed, how much oxygen is unused? (b) What is the percent \(\mathrm{Si}\) in \(\mathrm{SiO}_{2} ?\) (c) What is the percent \(\mathrm{O}\) in \(\mathrm{SiO}_{2}\) ?

Silver has only two naturally occurring isotopes: \({ }^{107} \mathrm{Ag}\) with a mass of \(106.90509 \mathrm{amu}\) and an abundance of \(51.84 \%\) and \({ }^{109} \mathrm{Ag}\) with a mass of \(108.9047\) amu. Calculate the atomic mass of silver.

Suppose two ions have been accelerated down a mass spectrometer, one of light mass and one of heavy mass. Which one do you think will take more voltage to the electromagnet to make it reach the detector? Explain. (Hint: Think about moving a chair versus a piano.)

Explain the difference between mass number and atomic mass.

What element seems poorly placed in group IA (1), the alkali metals? Why?
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