Chemistry Chapter 12

Using the following equation:
Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)
How many moles of iron (Fe) can be made from  6 moles H₂? 

• 4 moles Fe

• 6 moles Fe

• 9 moles Fe

• 2 moles Fe

Balance this reaction: ____ RbNO₃ + ____ BeF₂ ----> ____ Be(NO₃)₂ + ____ RbF

• 1,1,1,1

• 1,2,1,1

• 2,1,1,2

• 2,1,2,1

What is the mass of one mole of silver?

• 32.06 g

• 107.87 g

• 14.01 g

• 22.99 g

48.86 g of cobalt is equal to how many moles of cobalt?

• 2879 moles

• 8.291 moles

• .8291 moles

• .829 moles

how many atoms are contained in a 456 g sample of carbon dioxide?

• 10.34 atoms

• 6.237 x 10²⁴ atoms

• 1.871 x 10²⁵atoms

• 2.079 x 10²⁴ atoms

What would be the mass of 9.76 x 10²² formula units of SrCl₂?

• .1622 g

• 25.7 g

• 20.0 g

• .3589 g

A sample of AlCl₃ contains a total of 4.515 x 10²⁷ atoms of chlorine. What must be the mass of this sample?

• 2.500 x 10⁵ g

• 1.000 x 10⁶ g

• 18.75 g

• 3.333 x 10⁵ g

What is the molar mass of Hydrogen Peroxide (H₂O₂)?

• 48 g/mole

• 34.02 g/mole

• 36.5 g/mole

• 35.5 g/mole

How many molecules are in 9.44 moles of AlCl₃?

• 5.68 molec AlCl₃

• 5.68x10²⁴ molec AlCl₃

• 0.705 molec AlCl₃

• 1.25x10²³ molec AlCl₃

Tags

NGSS.HS-PS1-7

States that the total pressure of a mixture of gases is equal to the sum of the pressures of each gas in the mixture.

• Dalton's Law of Partial Presure

• Graham's Law of Effusion

• diffusion

• freezing point