Unit 1
If 0.105 mol of Helium gas (He2) occupies a Volume at 2.35 L at a constant Temperature and Pressure, what Volume would 0.337 mol of He2 occupy under the same conditions?
Calculate the value of V2: V2 = 7.54 L So, under the same conditions, 0.337 mol of helium would occupy a volume of 7.54 L.
Are two atoms of the same element identical?
No. Two atoms of the same chemical element are typically not identical.
electron
particle that has a negative charge - located in rings outside the nucleus of an atom. You can figure out the number of electrons by looking at the atomic number of an element.
From Earth’s atmosphere, where can the carbon atom go next?
From Earth’s atmosphere, the carbon atom can go to the Oceanic CO2 or to the Land of plants.
Chemical Equilibrium (CEq)
State where Forward Reaction (Rxn) Rate equals Reverse Rxn Rate.
If 1.00 mol of Argon gas (Ar2) occupies a Volume of 22.4 L, what Volume will 9.68 mol of Ar2 occupy under the same conditions?
2.45 mol of argon gas
How do plants get their nitrogen from the air?
Plants do not get their nitrogen directly from the air.
atomic number
number of protons in the nucleus of an atom. This is the same number as the number of electrons
How do plants on Earth affect the amount of carbon in Earth’s atmosphere?
Plants on Earth affect the amount of carbon in Earth’s atmosphere because plants need carbon so they take carbon from the Earth’s atmosphere
Forward Reaction
Movement of Chem Rxn from Left → Right (L → R), or from Reactants to Products (R →P).
what is Avogadro´s number?
6.0221408e+23
element
substance that CANNOT be chemically broken down into simpler substances
CHEMISTRY SINGLE DISPLACEMENT REACTION
Zn + 3 AgNO3 - ->
3Ag + Zn(NO3)3
Animals eat plants and produce carbon dioxide and water. How do animals affect the amount of carbon in Earth’s atmosphere?
Animals affect the amount of carbon in Earth’s atmosphere because they eat plants to produce carbon dioxide and water. It’s a cycle that we have to continue and survive.
Reverse Reaction
Movement of Chem Rxn from L ← R, or from Products to Reactants (R ← P) .
Balance this chemical equation H 2 ( g ) Hydrogen + O 2 ( g ) Oxygen
H2O
atom
smallest part of an element that can be identified as that element
2Al + 3HSO, --->
3 H2 + Al(S04)3
Since hard-shelled organisms evolved about 550 million years ago, billions of tons of limestone rock have been produced from their shells. Limestone is made of calcium carbonate, with the formula CaCO3.
This means that there has been calcium carbonate with the formula CaCO3 made about 550 millions years ago making billions of tons of limestone rock made from shells.
Le Chatelier’s Principle (LCP):
If a Chemical System @ Chemical Equilibrium (CEq) experiences a disturbance, it changes in a way that counteracts the change as it returns to Chemical Equilibrium.
Calculate the Mass if the Energy required is -13.77 J , the Specific Heat Capacity is 5.798 (J/g℃) and if the Temperature changes from 86℃ to 67℃.
m=5kg
proton
particle that has a positive charge - located in the nucleus of an atom. You can figure out the number of protons by looking at the atomic number of an element.
Cu + Al2(SO.) --.>
No reaction
Suppose we completely stopped burning fossil fuels immediately. How many years would it take to return to atmospheric CO2 levels from the year 1800, about 600 GtC?
It would take about 50 years for the Atmospheric CO2 to drop down to 600 GtC with no fossil fuel usage.
what is ocean acidification
Ocean acidification is the decrease in the pH of the Earth's ocean.