S1-Q5- equations and mole

The mass of one mole of an element is equal to

• its atomic number from the periodic table, but in amus.

• its atomic mass from the periodic table, but in amus.

• its atomic mass from the periodic table, but in grams.

• its atomic number from the periodic table, but in grams.

Determine the mass of 4.20 moles of C₆H₁₂ [C=12; H=1]

• 353 g

• 0.0499 g

• 337 g

• 2.53 x 10²⁴ g

How many grams are in 1.2 moles of neon? [Ne=20]

• 0.059 grams

• 7.2 x 10²³ grams

• 2.0 x 10^-24 grams

• 24 grams

How many moles are in 98.3 grams of aluminum hydroxide, Al(OH)₃? [Al=27 ; O=16 ; H=1]

• 1.26 moles

• 0.8 moles

• 7,670 moles

• 1.63 x 10^-22 moles

N₂ + 3H₂ → 2NH₃

What is the mole ratio between N₂ and NH₃ in the above reaction?

• 1 moles NH₃ / 2 moles N₂

• 2 moles NH₃ / 1 moles N₂

• 2 moles N₂ / 3 moles NH₃

• 1 moles N₂ / 3 moles NH₃

N₂ +  3H₂ → 2NH₃ 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?

• 6
• 2
• 3
• 1

Tags

NGSS.HS-PS1-7

2H₂   +   O₂  →  2H₂O
How many moles of water can be produced if 8 moles H₂ are used?

• 4 moles
• 8 moles
• 16 moles
• 2 moles

Tags

NGSS.HS-PS1-7

Given the reaction: 4Al + 3O₂ --> 2Al₂O₃

How many moles of Aluminum oxide, Al₂O₃, can you produce if you have 2 moles of Al?

• 3 mole

• 2 mole

• 1 mole

• 0.5 mole

Tags

NGSS.HS-PS1-7

Molar mass is in units of ________.

• grams
• grams/mole
• mole
• moles/gram

Tags

NGSS.HS-PS1-7

How many moles are present in 32.2 grams of carbon dioxide (CO₂)? [C=12 ; O=16]

• 44.01 moles

• 1421.52 moles

• 32.3 moles

• 0.73 moles