Draw a model of NaCl
Name NaCl
Sodium Chloride aka table salt
Name CO2
Carbon Dioxide
What does the law of conservation of mass state?
mass is neither created nor destroyed in chemical reactions, atoms are merely rearranged
Draw a model of Carbon Dioxide
Calcium Oxide
Name CCl4
Carbon tetrachloride
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
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
NAme this compound
Sodium Hydroxide
What is the formula for hydrogen monoiodide
HI
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
How many electrons fit in the first 4 shells
2, 8, 18, 32
Name This Compound: PbCl2
Lead Chloride
What is the formula for dinitrogen trioxide
N2O3
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.
How do you calculate the number of neutrons in an element?
Atomic mass - Atomic number
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
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
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