$$\text{K}_2\text{Cr}_2\text{O}_7$$

Question 1

Which of the following best describes the process used to determine the weighted average atomic mass of an element?

Accepted Answer

Multiplying the mass of each isotope by its fractional abundance, then summing the products.

Question 2

A sample contains 12.00 g of isotope carbon-12. How many atoms are present in the sample?

Accepted Answer

$$6.02 	imes 10$$^{23}$$

Question 3

Which statement about Avogadro's number is correct?

Accepted Answer

It is the number of molecules in 1 mole of a compound.

Question 4

Which of the following ions has a charge of $$+3$$?

Accepted Answer

$$	ext{Al}^{3+}$$

Question 5

What is the correct formula for the ionic compound formed between magnesium and nitrate?

Accepted Answer

$$	ext{Mg(NO}_3)_2$$

Question 6

Which of the following is NOT a property of ionic compounds?

Accepted Answer

They have low melting points.

Question 7

Which element is most likely to form a cation with a $$+1$$ charge?

Accepted Answer

Sodium

Question 8

What is the correct Lewis structure for methanol, $$	ext{CH}_3	ext{OH}$$, in terms of electron pairs and bonds?

Accepted Answer

Carbon forms three single bonds to hydrogen and one single bond to oxygen; oxygen has two lone pairs.

Question 9

Which of the following is the correct formula for sodium phosphate?

Accepted Answer

$$	ext{Na}_3	ext{PO}_4$$

Question 10

Which of the following compounds is a strong electrolyte when dissolved in water?

Accepted Answer

$$	ext{NaCl}$$

Question 11

What is the correct name for $$	ext{FeCl}_3$$ using classical nomenclature?

Accepted Answer

Ferric chloride

Question 12

Which of the following is the correct formula for calcium nitrate?

Accepted Answer

$$	ext{Ca(NO}_3)_2$$

Question 13

Which statement about transition metals is correct?

Accepted Answer

They can form ions with multiple charges.

Question 14

Which of the following is the correct formula for ammonium sulfate?

Accepted Answer

$$	ext{(NH}_4)_2	ext{SO}_4$$

Question 15

Which of the following is the correct IUPAC name for $$	ext{CuSO}_4 \cdot 5	ext{H}_2	ext{O}$$?

Accepted Answer

Copper(II) sulfate pentahydrate

Question 16

Which of the following is a correct statement about polyatomic ions?

Accepted Answer

They consist of two or more atoms covalently bonded with an overall charge.

Question 17

Which of the following is the correct formula for the compound formed between aluminum and sulfate?

Accepted Answer

$$	ext{Al}_2	ext{(SO}_4)_3$$

Question 18

Which of the following is the correct name for $$	ext{Na}_2	ext{CO}_3$$?

Accepted Answer

Sodium carbonate

Question 19

Which of the following is the correct formula for potassium dichromate?

Accepted Answer

$$	ext{K}_2	ext{Cr}_2	ext{O}_7$$

General Chemistry: Atomic Mass, Chemical Bonding, and Organic Nomenclature Study Notes

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