Stoichiometry Test

Avogadro’s number is:

• 6.02 x 10²²

• 6

• 6.02 x 10²³

• 3.01 x 10²³

A formula with the lowest whole # ratio of elements in a compound is called

• Molecular Formula
• Chemical Formula
• Empirical Formula 
• Distance Formula

A chemical formula that shows the actual # and kinds of atoms present in one molecule of a compound is called_________

• ionic formula
• covalent formula
• empirical formula
• molecular formula

Which principle states that the ratio of elements in a compound is constant for every particle in that compound?

• law of conservation of matter

• law of multiple proportions

• second law of thermodynamics

• law of definite composition

In a chemical reaction, the _________________ is used up before the others and prevents more of the products from forming.

• limiting reactant

• limiting product

• excess reactant

• excess product

The most important indicator of efficiency for a chemical manufacturing company would be _________________ yield.

• actual

• percent

• potential

• theoretical

What is the molar mass of NaOH?

• 40 g/mol
• 38.989 g/mol
• 23.998 g/mol
• 57.004 g/mol

How many atoms are in 1.50 moles of Hg?

• 9.03x10²³ atoms Hg
• 9.03x10²⁴ atoms Hg
• 903 atoms of Hg
• 9.03 atoms of Hg

Tags

NGSS.HS-PS1-7

Calculate the molar mass of Ba(C₂H₃O₂)₂

• 255.3 g/mol

• 237.3 g/mol

• 228.3 g/mol

• 196.3 g/mol

What id the molar mass of UF₆?

• 101 g/mol

• 238 g/mol

• 257 g/mol

• 352 g/mol