Quiz One Review

Conversions!

100

Convert 52,793 Tmol to pmole. Express the answer to three significant figures.

5.28 x 10²⁸pmol

200

Convert 47.260 fg to cg. Round your answer to four significant figures.

4.726x10^-12cg

300

John traveled 313,600 inches on his bike. His sister, Sarah, biked 5.03 miles. Who traveled the farthest distance and by how much? (answer in km)

(1m=39.37in)

(1 mi = 1.609 km) 

John traveled 7.965 km

Sarach traveled 8.093km

Sarah traveled farther by about 0.128km

400

Lois wants to send a box of oranges to a friend by mail. The box of oranges cannot exceed a mass of 15lbs. If each orange has a mass of 7.05oz , what is the maximum number she can send? (2sf)

(1oz=28.35g)

(1lb=453.6g)

She can send 34 oranges! 

500

To connect your computer to the internet via a wired connection, you need 546 cm of cable, which sells for $0.235 / ft. What is the cost of the cable? 

(1 in = 2.54cm ; 12 in = 1ft)

Keep in mind sig figs!

$4.21

Stochiometry

100

What is the mass (in grams) that corresponds to 0.0653 mol of Hg? 

Round to 3 sf

13.1g

200

Determine the number of Zn atoms in 98.9 grams of Zn. 

3 sf

9.11x10²³atoms

300

How many Na+ ions are in 9.898 grams of sodium sulfide? 

4 sf

1.527 x 10²³ions

400

2K + 2H₂O ---> 2KOH + H₂

How many grams of hydrogen gas are produced from 2.35 moles of water? 

2.37 g H₂

500

Balance the following equation:

Cr + AgNO₃ ---> Cr(NO₃₎₂ + Ag

How much silver can be produced from 12.7 grams of silver nitrate?

8.06 grams Ag

Random Math

100

Balance the following equation:

NH₃ + O₂ ---> N₂ + H₂O

4NH₃ + 3O₂ ---> 2N₂ + 6H₂O

200

What is the mass % of each element in sodium chloride?

%Na = 39.3%

%Cl = 60.7%

300

A chloride of silicon contains 83.2 mass % Cl. What is the empirical formula?

SiCl₄

400

Determine the empirical and molecular formula for chrysotile asbestos. Chrysotile has the following percent composition: 28.03% Mg, 21.60% Si, 1.16% H, and 49.21% O. 

The molar mass for chrysotile is 520.8 g/mol.

Empirical: Mg₃Si₂H₃O₈

Molecular: Mg₆Si₄H₆O₁₆

500

A strip of zinc metal weighing 5.00 g is placed in an aqueous solution containing 6.25g of silver nitrate, causing the following reaction:

Zn  + AgNO₃ → Ag (s) + Zn(NO₃)₂ 

Balance the following chemical equation to answer the following questions: 

- What is the limiting reagent?

- How many grams of silver is formed?

- How many grams of the excess reagent is left over? 

(3sf)

AgNO₃ is the limiting reagent

3.97 g of Ag is formed

3.79 g of Zn is left over

Bonding and the periodic table

100

How many valence electrons does oxygen have and what is its' charge?

How many valence electrons does boron have and what is its' charge?

6 valence and -2.

3 valence and +3

200

Which of the following is an isotope of Carbon?

a) A = 30, Z=15

b) A = 15, Z= 6

c) A= 14, Z = 7

B

Carbon has 6 protons. 

300

Argon has three naturally occurring isotopes Ar-40, Ar-36, and Ar-38.

Determine the number of protons, neutrons, and electrons in each carbon isotope.

Ar-40: 18 protons, 18 electrons, 22 neutrons

Ar-36: 18 protons, 18 electrons, 18 neutrons

Ar-38: 18 protons, 18 electrons, 20 neutrons

400

Between which types of elements does covalent bonds form between?

Draw the lewis dot structure for water. 

Covalent bonds occur when nonmetals share electrons.

500

Draw the lewis dot structure for phosphorous. Based on this, the preferred bonding pattern for phosphorous is ____ bonds and ___lone pairs.

What is the preferred bonding pattern for oxygen?

3 bonds and 1 lone pair

2 bonds and 2 lone pairs 

Naming Compounds

100

Name the following Binary Compounds:

N₂O₄

Ca₃Cl

CH₄

OF₂

Dinitrogen tetroxide

Tricalcium chloride 

Carbon tetrahydride 

Oxygen difluoride 

200

List the polyatomic ion formulas for nitrite, nitrate, sulfite, and sulfate.

Nitrite: NO₂^-

Nitrate: NO₃^-

Sulfite: SO₃^2-

Sulfate: SO₄^2-

300

List the polyatomic ion formulas for hypochlorite, chlorite, chlorate, and perchlorate. 

Also for hypoiodite, iodite, iodate, and periodate.

Hypo- : ClO^- and IO^-

-ite : ClO₂^- and IO₂^-

-ate : ClO₃^- and IO₃^-

Per - : ClO₄^- and IO₄^-

400

What are the names for the following ionic compounds? 

Al₄C₃

HgO

Ca(NO₃)₂

aluminium carbide 

mercury (II) oxide

Calcium nitrate 

500

Write the formulas that are connected to the ionic compound name:

Iron (II) nitrate

Potassium permanganate 

Silver bicarbonate 

ammonium phosphate

Fe(NO₃)₂

KMnO₄

AgHCO₃

(NH₄)₃PO₄