Miscellaneous
Ionic Compounds
Covalent Compounds
Law of Conservation of Mass
100
Draw a model of NaCl
100
Name NaCl
Sodium Chloride aka table salt
100
Name CO2
Carbon Dioxide
100
What does the law of conservation of mass state?
mass is neither created nor destroyed in chemical reactions, atoms are merely rearranged
200
Draw a model of Carbon Dioxide
200
Name CaO
Calcium Oxide
200
Name CCl4
Carbon tetrachloride
200
Does this experimental data support the Law of Conservation of Mass?
Yes as the mass of the two reactants equals the total mass of the products
300
What is the definition of valency, what does valency do and how many valence electrons does Oxygen have
Valency refers to how many electrons are present in the outer shell of an atom. Valency tells us how many more electrons are required for the outer shell to reach noble gas status.
Oxygen's valency is 6
300
NAme this compound
Sodium Hydroxide
300
What is the formula for hydrogen monoiodide
HI
300
Based on the Law of Conservation of Mass, predict the minimum amount of magnesium that will react with all 16.0 grams of oxygen to produce 40.3 grams of magnesium oxide.
24.3g of magnesium
400
How many electrons fit in the first 4 shells
2, 8, 18, 32
400
Name This Compound: PbCl2
Lead Chloride
400
What is the formula for dinitrogen trioxide
N2O3
400
A student adds 25 g of baking soda to 10 g of acetic acid in a beaker. A chemical reaction occurs and a gas is given off. After the reaction, the mass of the products remaining in the beaker is 23.
Does the law of conservation of mass occur in this reaction?
Yes. 12g of gas has been given off
The law of conservation of mass occurs in all chemical reactions.
500
How do you calculate the number of neutrons in an element?
Atomic mass - Atomic number
500
If an atom ___________ electrons, then its ion is positive (there are ____________ protons than electrons). If an atom ______________ electrons then the charge of its ion will be negative (there are ________ electrons than protons).
Loses, more, gains, less
500
Covalent compounds form when atoms bond by ______________ outer-shell electrons. They form when non- metals come together. In these bonds, no electrons are transferred. instead, atoms ____________ pairs of electrons in order to gain a ____________ outer shell, also known as a _____________ gas electron configuration.
sharing, share, full, noble
500
When ammonium nitrate (NH4NO3) explodes, the products are nitrogen, oxygen, & water. When 40 grams of ammonium nitrate explode, 14 grams of nitrogen and 8 grams of oxygen form. How many grams of water form? (NH4NO3 --> N2 + O2 + H2O)
If The total mass is 40g...
(N is 14g, O is 8g)
N=14*2 = 28g
O2=5.3g
Therefore, 7g of H2O is formed