Chemistry review

Grab Bag

100

10-letter word that describes a testable prediction in the scientific method

Hypothesis

200

This quantity is calculated by dividing the mass of a substance by its volume

Density

300

What are the units for the molar mass of an element or compound?

grams/mole or amu

400

S₂Cl₅

(Give the name)

Disulfur pentachloride

500

Determine the formulas for the following (which one doesn’t exist?):

1) Nitrogen trihydride

2) Selenium tetrabromide

3) Dihelium mononitride

4) Diboron trioxide

NH₃

SeBr₄

He₂N (DNE)

B₂O₃

Atomic Structure

100

Give the charges of each: proton, neutron and electron

+, neutral, -

200

The protons and neutrons make up this part of the atom

Nucleus

300

This is the number of protons in the following isotope:  Si-28

14

400

The number of neutrons in the following isotope:

Nitrogen-13

6

500

The number of electrons in the following ion

Fluorine with a 1- charge

10

Balancing

100

What is the first step when balancing a chemical equation?

A) Calculate densities

B) Check the number of atoms on both sides

C) Randomly assign numbers

D) Cry for two hours

B) Check the number of atoms on both sides

200

Balance the following equation

C (s) + O₂ (g) ---> CO₂ (g)

C (s) + O₂ (g) ---> CO₂ (g)

Already balanced

300

How many atoms are there of each element?

Ca(MnO₃)₂

1 Ca, 2 Mn, 6 O

400

Balance the following equation:

__CaSO₄ + __KOH --> __Ca(OH)₂ + __K₂SO₄

1 CaSO₄ + 2 KOH --> 1 Ca(OH)₂ + 1 K₂SO₄

500

Balance and identify the type of reaction:

C₃H₆  +  O₂  --->  H₂O  +   CO₂

2 C₃H₆  +  9 O₂  --->  6 H₂O  +   6 CO₂

Combustion

Chemical Calculations

100

What is the molar mass of sodium bicarbonate (NaHCO₃)

84 g/mole

200

How many grams are there in 2.0 moles of N₂O₅ ?

216 g

300

How moles are there in 6.0 grams of water (hint: this will be a decimal)

0.33 moles

400

How many hydrogen atoms are in one molecule of the following:

CH₃CH₂(COOH)₂OH

8

500

If I have 10 g of AgCl₂, how many grams of silver could I extract from it (percent composition question)

Approx 6 g

"A" in chemistry

100

The only noble gas that fits this category

argon (Ar)

200

An early “science” concerned with turning common elements and compounds into gold

Alchemy

300

Commonly found on the periodic table, this term refers to 10 in neon, 3 in lithium and 17 in chlorine

atomic number

400

6.02 x 10^23

Avogadro's number

500

Element symbol that inspired the name of a country originally colonized by the Spanish (the full name of the element does NOT start with an A)

Ag (Argentum, in Latin)