Basics
Patterns
Formulas
Math
Graphs+Charts
100
what do you do first if you get chemicals in your eyes?
use the eye wash
100
elements in the same column / group have the same number of
valence electrons
100
What is the formula for density?
Density = mass / volume = g / mL
100
calculate the molar mass of H2O
2x1 + 1x16 = 18 g/mol
100
Which line shows water ONLY as a gas?
Line E-F
200
name 2 things you should do when using electrical equipment
tell teacher if not working
check for frayed wires
unplug from plug not cord
200
how many valence electrons are in nitrogen?
5
200
What is the formula for molarity?
M = moles / Liters
200
I have 1,000 g of Al. If the half life of Al is 10 years, how long would it take for me to end up with 125 g of Aluminum
1,000 -> 500 -> 250 -> 125
After 30 years
200
What is the melting point of iron from this graph?
Approximately 1500 Celsius
300
what type of glassware do we use to measure volume?
graduated cylinder
300
If a molecule looks the same on both sides when you cut it in half, it is (polar or nonpolar)
Nonpolar
300
What kind of chemical reaction is this?
2 Ca(OH)2 --> 2 Ca + 2 H2O + 1 O2
Decomposition
300
How many moles of O2 are produced by 4 moles of Ca(OH)2 using the equation below?
2 Ca(OH)2 --> 2 Ca + 2 H2O + 1 O2
2 moles Ca(OH)2 yield 1 mole O2 so 4 moles yield
2 moles O2
300
A substance has a pH of 9.
What is the pOH and is this substance an acid, base, or neutral?
pOH = 14 - pH = 14 - 9 = 5
pH over 7 is a base
400
when an atom is NEUTRAL it has the same number of ____ and ____
protons and electrons
400
Is this equation endothermic or exothermic? How do you know? AB + CD --> AD + CB + 100 kJ
Exothermic - heat is exiting (kJ on the right)
400
How do I convert molecules to moles?
Molecules / 6.02 x 1023 = Moles
400
Balance this equation:
_H2S + __ Ba(OH)2 ⇒ __HOH + __ BaS
1 H2S + 1 Ba(OH)2 ⇒ 2 HOH + 1 BaS
400
I have 80 g of KBr at 120 degrees C. This solution is...
unsaturated
500
I have a neutral atom of O-18. Tell me the number of protons, neutrons, and electrons.
p+ = 8
n0 = 18-8=10
e- = 8 (neutral so e=p)
500
What would cause the volume in a balloon to increase if the amount of gas does not change?
Volume increases when temperature increases (gets warmer)
500
Name this chemical: (NH4)2 CO3
Ammonium Carbonate
500
I have 2 moles of gas. How many liters do I have?
22.4 x 2 = 44.8 L
500
A solution of 120 g of NaClO3 at 10 degrees C is...
supersaturated