Counting Atoms
Balancing Equations
Moles (No calulations)
Moles (Calculations)
Random
100

What is the atomic number of hydrogen?

1

100

MgCl2 ---> Mg +Cl2

MgCl2 ---> Mg +Cl2

(Already balanced)

100

What is avogadro's number?

6.02x1023 

100

How many moles are there in 6.02x1023 particles?

1 mole

100

What is chemistry the study of?

Matter

200

How many protons does oxygen have?

8

200

H2 + O2 --> H2O

2H2 + O2 --> 2H2O

200

Why do we have to include the same unit on the numerator and denominator for stoich problems?

To cancel out units

200

How many grams of H2O are there in 1 mole?

18 grams

200

What particles are in the nucleus of an atom?

Protons and Neutrons

300

How many neutrons does the average Argon have? (Molar mass of 39.948)

20

300

Mg(OH)2 +  HCl ---> MgCl2 +  H2O

Mg(OH)2 + 2 HCl ---> MgCl2 + 2 H2O

300

If I wanted to convert from moles to grams, what conversion factor would I use?

1 mole = 1 Molar Mass

300

How many liters are there in 50 grams of water vapor?

62 Liters

300

What does stoichiometry mean?

Measurement of elements

400
How many protons would NaCl have?

28

400

CH4 +  O2 ---> CO2 +  H2O

CH4 + 2 O2 ---> CO2 + 2 H2O

400

If I wanted to convert from particles to liters, what conversion factor would I use?

6.02x1023 particles = 22.4 liters

400

How many grams are there in 3.5 moles of oxygen gas?

112 grams

400

How does the atomic number and mass number change in alpha decay?

Mass number goes down by 4, atomic number goes down by 2

500

Rank the following from lowest valence electrons, to highest number of valence electrons


Bromine, Nitrogen, Carbon, Lithium, Neon

Lithium, Carbon, Nitrogen, Bromine, Neon

500

NH3 + O2 ---> NO + H2O

 

 4 NH3 + 5 O2 ---> 4 NO + 6 H2O

500

Set up the boxes to calculate how many particles there are in 15 grams of sodium

15 grams sodium x (6.02x1023 particles / 22.9 grams)

500

How many particles are there in 34 grams of NaCl?

3.5 x 1023 particles

500

Which element has the highest electronegativity value, and what does electronegativity mean?

Fluorine, ability to attract electrons

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