FINAL EXAM REVIEW PART 2

What does a mole represent?

• The number of elements on the periodic table
• The number of particles of a substance (Avogadro's number)
• The number of compounds a substance can form
• The number of small animals living underground

Tags

NGSS.HS-PS1-7

Which of the following shows the correct relationship between a mole of carbon and its number of particles and mass?

• 1 mole = 100 g = 12 particles = 50 L
• 1 mole = 12.0 g = 12 particles = 1 L
• 1 mole =12.0 g =. 6.02x10^23 particles = 22.4 L
• 1 mole = 1200 g = 6.02 particles = 22.4 L

Tags

NGSS.HS-PS1-7

Which shows the correct way to calculate the formula molar mass for NaCl?

• Divide the atomic mass by the number of atoms then subtract the values
• Divide the number of atoms by a whole number
• Multiply the number of atoms by a whole number
• Multiply the atomic mass by the number of atoms then add the values

Calculate the molar mass of the formula: KOH

• 76.1 g/mol
• 66.1g/mol
• 56.1g/mol
• 46.1g/mol

Tags

NGSS.HS-PS1-7

What do we call the strategy to organize the conversion of moles, grams, and atoms?

• the "box"
• the "fence"
• the "criss-cross"
• the "cat and onion"

Why did the teacher put the conversion factor of g/mol like this?

• He wanted to cancel out the gram units
• He wanted to cancel out the mole units

Tags

NGSS.HS-PS1-7

How many atoms are found in 2.30 moles of CO? (DON'T FORGET TO SHOW YOUR WORK IN YOUR JOURNAL FOR EXTRA CREDIT!)

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How many grams are in 0.6144 moles of Chromium?(DON'T FORGET TO SHOW YOUR WORK IN YOUR JOURNAL FOR EXTRA CREDIT!)

• 32.0 g Cr
• 42.0 g Cr
• 52.0 g Cr
• 62.0 g Cr

Which of the following definitions correctly describes percent composition?

• Percent by mass of each individual elements within a compound
• Percent by mass of the compound water
• Percent by atoms of each individual elements within a compound
• Percent by atoms of the compound water

How many grams of Oxygen would be in would be in a bag of 1000 grams of sugar if its formula is the one shown?

• 515 g
• 615 g
• 700 g
• 800 g

Tags

NGSS.HS-PS1-7