Podcast
Questions and Answers
What percentage of the universe's mass consists of elements other than hydrogen and helium?
What percentage of the universe's mass consists of elements other than hydrogen and helium?
- 22.4%
- 95.4%
- 4.6% (correct)
- 73.0%
What is the mass of sodium on Earth expressed in scientific notation?
What is the mass of sodium on Earth expressed in scientific notation?
- 7.8 ⋅ 10^3 kg
- 2.5 ⋅ 10^7 kg (correct)
- 1.0 ⋅ 10^2 kg
- 3.3 ⋅ 10^6 kg
In a 70 kg person, what is the approximate mass of oxygen?
In a 70 kg person, what is the approximate mass of oxygen?
- 22.4 kg (correct)
- 45.0 kg
- 30.0 kg
- 6.0 kg
What is the approximate mass of hydrogen in a typical 70 kg person?
What is the approximate mass of hydrogen in a typical 70 kg person?
What total mass of oxygen and hydrogen combined would you find in a 70 kg person?
What total mass of oxygen and hydrogen combined would you find in a 70 kg person?
Flashcards
What percentage of the universe is not hydrogen or helium?
What percentage of the universe is not hydrogen or helium?
Only about 5% of the universe's mass is made up of elements other than hydrogen and helium.
Earth's Sodium Mass
Earth's Sodium Mass
The mass of sodium present on Earth is approximately 8.6 ⋅ 1019 kg.
Oxygen's mass in a 70 kg person?
Oxygen's mass in a 70 kg person?
A 70 kg human contains roughly 45.5 kg of oxygen.
Hydrogen's mass in a 70 kg person?
Hydrogen's mass in a 70 kg person?
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Mass of elements in the human body.
Mass of elements in the human body.
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Study Notes
Question a
- Percentage of universe's mass not hydrogen or helium:
- A percentage value (missing from the provided image) is needed to be calculated
Question b
- Earth's mass: 6 x 1024 kg
- Sodium mass on Earth:
- A calculated value in kg is needed, expressed in scientific notation with one decimal place (missing from the provided image).
Question c
- Person's mass: 70 kg
- Oxygen mass in the person:
- A calculated value in kg (missing from the provided image) is needed.
- Hydrogen mass in the person:
- A calculated value in kg (missing from the provided image) is needed.
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Description
Test your understanding of mass calculations and the composition of matter in the universe. This quiz covers topics such as the mass of the universe, Earth, and human bodies, requiring you to compute various values in scientific notation. Prepare to engage with fundamental concepts in physics and chemistry as you work through these questions.
