Chemical Reactions
What does the symbol, "aq" stand for?
aqueous
6.02 x 1023 atoms are equal to how many moles?
1 mole
Soluble or Insoluble: NaNO3
Soluble (aq)
Is CO2 a greenhouse gas?
Something with a pH of 4 would be: acidic / basic / neutral?
acidic
Water boiling from a pot on a stove is an example of what kind of change?
Physical change
How many atoms are in 2 moles?
1.20 x 1024 atoms
What is a "group 1" element
An element in the far left of the periodic table.
Heat energy is a common name for what type of energy? (hint: snakes use this to sense prey!)
infrared radiation (energy)
What is the pH of a solution where [H+] = 1.0 x 10-4 M?
4
When balancing equations, it's best to save which two elements for last?
H and O
0.264 mol NaCl
Is Ag2CO3 soluble or insoluble?
insoluble (s)
Why is the global temperature on Earth rising?
Global warming due to greenhouse gas emissions.
What is the [H+] of a solution with a pH of 7?
1.0 x 10-7 M
What coefficients would balance the following equation:
__Na + __Cl2 --> __NaCl
2, 1, 2
How many moles are required to completely react with 1.45 mol of chlorine, based on the following equation:
2 Na + Cl2 --> 2 NaCl
2.90 mol Na
Is MgO soluble or insoluble?
Soluble (aq)
Given the same amounts of each, which is the most harmful greenhouse gas? CO2, CH4, or N2O?
N2O
What is the pH of a 0.00032 M solution of HCl?
3.49
What coefficients would balance the following equation:
__Al + __S8 --> __Al2S3
16, 3, 8
How many grams of magnesium would be required to produce 5.50 g of magnesium oxide (MgO)
2 Mg + O2 --> 2 MgO
3.32 g Mg
What are the products of the double replacement reaction of these two reactants (including phase of matter)?
NaOH + AlF3 --> ___( ) + ___( )
NaF (aq) + Al(OH)3 (s)
Describe the greenhouse effect
Greenhouse gas molecules trap heat in earth's atmosphere.
What is the pH of a 0.00032 M solution of LiOH?
10.51