Katie
What is the definition of a physical property?
a property that can be observed without changing its composition (ex: color, boiling point)
What is the definition of a calorie?
Amount of heat it takes to raise 1g of pure water by 1oC
Put 0.000327 in scientific notation.
3.27 x 10-4
What is the difference between quantitative and qualitative?
Quantitative- measurements involve numbers
Qualitative- measurements are words such as heavy or hot
What element is Hg?
Mercury
1 kilojoule= ? joules
1000 joules
What is the charge of the cation?
What is the third step of the Scientific Method?
Hypothesis
Name the molecular compound: N2O
Dinitrogen monoxide
1 calorie = ? joules
4.184 joules
Name this binary compound: NaCl --> Na + Cl
Sodium (I) chloride
What is the equation for specific heat?
heat added = mass x temp. change x specific heat
What is the basic structure of a prokaryotic cell?
-unicellular
-lacks organelles
-nucleoid (not a nucleus)
If the atomic number of oxygen is 8 and the mass number is 16, how many protons, neutrons, and electrons are there?
protons= 8
neutrons= 8
electrons= 8
What is the density of Argon at STP?
1.78 g/L
Why does ice float?
As the water freezes, the hydrogen bonds push the water molecules farther apart from each other. This results in an open framework.
Predict the product of Na + Cl2 --->
NaCl
Name 3 non-metals on the periodic table.
Carbon, Nitrogen, Oxygen, Fluorine, Phosphorus, Sulfur, Chlorine, Selenium, Bromine, Iodine, and Astatine
What is the Law of Conservation of Mass, and why is it used for?
Mass cannot be created nor destroyed, only changed in form.
It is used to predict products.
Endothermic- a person sitting next to a campfire
Exothermic- campfire
What is the empirical formula of a molecule with 44% carbon, 23% hydrogen, and 33% oxygen?
C2H11O
Multiply in scientific notation: (5.0 x 103)(3.2 x 108).
1.6 x 1012
Name all the diatomic elements.
H2, F2, I2, N2, Cl2, O2, and Br2
What is the % composition of O in PO4?
67.4%
oH= 1 x 10-8 - pH?
6