My favorite animal
The atomic mass in grams will give the mass of 1 mole of that atom.
True or False
True
*textbook p. 259
Classify the reaction:
2C2H6O -> 4C +6H2 +O2
Explain your reasoning.
Decomposition of ethanol. The molecule on the left is being split into elements.
How many grams of boron equal 1 mole of boron?
10.8 grams
*textbook p 259
This type of reaction changes a compound into its constituent elements.
What is a decomposition reaction?
How many moles of glucose (C6H12O6) are in a 2.50 kg sample?
13.9 moles
OYO 7.8
Classify this reaction:
CH2O (g) + O2 (g) -> CO2 (g) + H2O (g)
Explain your reasoning.
Complete combustion. Oxygen is added to a compound to produce carbon dioxide and water.
Give the mass of one nitrogen atom in grams.
(1.00 amu=1.66 x 10-24 g)
2.32x10-23 grams
This nmenomic is used to remember these:
At BrINClHOF
Homonuclear diatomic molecules
How many moles of H2CO3 are in a 1,250 g sample of the compound?
20.2 moles
extra practice problem #6
Complete combustion produces ______ and ______. Incomplete combustion produces either ________ and water or _____ and water.
Complete combustion produces carbon dioxide and water . Incomplete combustion produces either carbon monoxide and water or carbon and water.
What is the mass of a Si6F12O6 molecule in grams?
1.00 amu = 1.66 x 10-24
8.18x10-22g
In chemical equations, the coefficients give the ratio of the substances in the chemical equation.
True or false
True
*textbook p.266
A sample of potassium chloride has a mass of 25.0 g. How many moles is that?
0.335 moles KCl
Extra practice problem #8
Name and explain the 3 types of reactions mentioned in this module.
Decomposition: a single compound is broken down into its elements
Combustion: oxygen is added and CO2 and H2O are produced
Formation: elements are forming a single compound
What is the molecular mass of CHCl3 in amu?
119.51 amu
A chemist has 100.0 moles of ammonia (NH3). If she allows this sample to decompose, how many moles of hydrogen gas will be produced?
150.0 moles
OYO 7.11
In the formation of ammonium phosphate, how many moles of N2 are required to make 15 moles of product?
45 moles N
Extra Practice Problem #12
Write a balanced equation for the formation of NaHSO4.
2Na + H2 + 2S + 4O2 -> 2NaHSO4
Practice Problem #2
How many atoms are in 457 grams of tungsten (W)?
1.50 x 1024 atoms
Practice problem #9
Explain what will happen if a fireplace is used in a house with poor ventilation.
Incomplete combustion will cause carbon monoxide to form (a poisonous gas).
*p.252-253