Chemical Quantities

What is Avogadro's Number? 

• 6.02 x 10²³

• - 6.02 10²³

• 6.02 x 10²²

• 6,020,000,000,000

Tags

NGSS.HS-PS1-7

What is the SI unit for the amount of a substance?

• meter

• mass

• molecule

• mole

How many hydrogen atoms are in the compound: (NH₄)₂CO₃

• 3

• 4

• 6

• 8

Tags

NGSS.MS-PS1-1

What is the percent composition of nitrogen in NH₃?

• 25%

• 14%

• 28%

• 82%

• 16

• 18

• 20

• 22

Tags

NGSS.HS-PS1-7

What is the molecular formula if the empirical formula is CH₂O and the molecular molar mass is 180.18?

• CH₂O

• C₂H₄O₂

• C₄H₈O₄

• C₆H₁₂O₆

A formula with the lowest whole # ratio of elements in a compound is called

• Molecular Formula

• Chemical Formula

• Empirical Formula 

• Distance Formula

How many moles are contained in 45 grams of aluminum?

• 27 mol

• 1215 mol

• 1.7 mol

• 57 mol

How many atoms of are contained in a mole of sodium?

• 6.02 x 10²³ atoms

• 11 atoms

• 23 atoms

• 2 atoms

What is the definition for Avogadro's number?

• number of grams per one mole of a substance

• whole number ratio that is a multiple of a chemical formula

• simplest, whole number ratio of a chemical formula

• 6.02 x 10^23 particles per one mole of a substance

Tags

NGSS.HS-PS1-7