Chemical Quantities

What is the mole used for? 

• To measure the amount of grams in a substance
• To measure the amount of atoms or molecules in a substance
• To measure the amount of energy in a substance
• To measure the amount of bonding in a substance 

Tags

NGSS.HS-PS1-7

What is the molar mass of platinum (Pt)?

• 195.08 grams per mole

• 195.08 grams per atom

• 195.08 moles per gram

• Both “a” and “b” are correct

Regarding Avogadro’s number and the mole, which of the following statements is TRUE?

• There are 12 atoms of carbon in 6.02 x 10²³ grams of carbon.

• There are 6.02 x 10²³ grams of carbon in one mole of carbon

• There are 12 atoms of carbon in 1 mole of carbon

• There are 6.02 x 10²³ atoms of carbon in 12 grams of carbon

Relating moles and particles, which of the following statements is most TRUE?

• 1 mole of bromine has more particles than 1 mole of nitrogen

• 1 mole of bromine has fewer particles than 1 mole of nitrogen

• 1 mole of bromine has the same number of particles as 1 mole of nitrogen

• There is no direct relationship between moles and number of particles

What is the molar mass of the compound BaBr?

• 137.33 g/mole

• 79.90 g/mole

• 217.33 g/mole

• 274.66 g/mole

Mole ratios for a reaction come from the ____

• coefficients in a balanced chemical equation

• molar mass of each substance

• periodic table

• total mass of the products

Tags

NGSS.HS-PS1-7

How many molecules are in 36.0 moles of carbon dioxide?

• 1.12 x 10²⁸ molecules

• 5.34 x 10²² molecules

• 2.16 x 10²⁵ molecules

• 3.34 x 10²² molecules

Convert 0.00062 grams to correct scientific notation

• 62 x 10^-4 grams

• 62 x 10⁴ grams

• 6.2 x 10^-4 grams

• 6.2 x 10⁴ grams

How many grams are in 3.6 x 10²² molecules of NaCl?

• 0.06 grams

• 1.0 x 10²¹ grams

• 1.3 x 10²⁶ grams

• 3.5 grams

What is the atoms of 1.0 x 10⁶ grams of Platinum (Pt)?

• 190 grams

• 3.1 x 10²⁷ grams

• 3.2 x 10^-27 grams

• 8.5 x 10^-21 grams