Moles and Counting with Mass

What is the numerical value of Avogadro's number?

• 1023

• 6.02x10²³

• 6.02x10³²

• 6.02x10²⁴

• 602

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-7

How are 2 moles of carbon and 2 moles of helium the same?

• They have the same mass.

• They have the same properties.

• They have the same charge.

• They have the same number of atoms.

If you put 30 beans on the scale and the total mass is 20 grams. What is the mass of 1 bean?

• Cannot be determined

• 30-20= 10 g

• 20/30= 0.67 g

• 30/20= 1.5 g

• 30X20= 600 g

If you know that 1 clothes pin has a mass of 2 grams, what is the mass of 50 clothes pins?

• 2 X 50= 100 g

• 50/2= 25 g

• 50/1 = 50 g

• 1/50= 0.04 g

• 1/2 =0.5 g

If I have 300 grams of staples and every staple weighs 0.2 grams, how many total staples do I have?

• 300X 0.2= 60 staples

• 300/ 0.2= 1,500 staples

• Cannot be determined

• 300 X 2 = 600 staples

Why does the the number for a mole have to be so large?

• Atoms are extremely small and it akes a lot of them to actually be able to measure them.

• We want a lot of atoms so that we can do large expreiments.

• Atoms are very large so the number for them should also be very large.

• To make things more complicated for no reason at all.

Which counting is used when you go buy eggs at the store?

• Individual

• Grouping

• Mass counting

• Volume counting

Which of the following is used to determine unit mass?

• Total mass of a number of items divided by the number of items

• Number of items divided by the total mass of a number of items

• Number of items X total mass

• Total mass- number of items

• number if items + total mass

Measuring with a measuring cup or teaspoons is taking advantage of which type of counting?

• Individual

• Group

• Mass

• Volume

Which type of counting would be the most accurate?

• Individual counting

• Group Counting

• Counting with mass

• Counting with volume