Stoichiometry: Chemistry for Massive Creatures

Chemistry helps us understand the biggest stuff in the universe by helping us understand ___

• the most massive

• the tiniest

• the most colorful

• the least plentiful

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

NGSS.HS-PS1-3

What is the molecular formula for sucrose, the common table sugar put in tea?

• C₁₂H₂₂O₁₁

• C₁₁H₆O₁₂

• C₁₂H₆O₆

• C₆H₁₁O₆

Tags

NGSS.HS-LS1-6

The science of measuring chemicals that go into and come out of any given reaction is called ___

• meteorology

• atomic mass measuring

• molar metrology

• stoichiometry

Tags

NGSS.HS-PS1-7

The average atomic mass of all of the naturally occurring isotopes of a given element is called ___

• the isotope number

• stoichiometry

• relative atomic mass

• the basic atomic mass unit

All of the natural carbon on Earth occurs as one of three isotopes, each with ___

• a mass of 12.01

• six neutrons

• six protons

• 12 protons

Tags

NGSS.HS-PS1-8

The relative atomic mass of carbon is ___

• 1/12 of an amu

• 1 amu

• 12 amu

• 12.01 amu

Since 1961, a single amu has been defined as the mass of ___

• a hydrogen atom

• 1/16th of an oxygen atom

• 1/12th of an atom of carbon-12

• 1/18th of an atom of oxygen-18

In what year were isotopes discovered?

• 1812

• 1869

• 1912

• 1961

Tags

NGSS.HS-PS1-8

What is the relative atomic mass of oxygen?

• 8 amu

• 16 amu

• 17 amu

• 18 amu

In chemistry, the mole is defined as the number of atoms in ___

• 1 gram of hydrogen 1

• 12 grams of carbon-12

• an average adult star-nosed mole

• 16 grams of oxygen-16