Chemical Bonds
Data and Lab Analysis
Classifications of Matter
Gas Laws
Stoichiometry, Empirical and Molecular Formula
100
Why does bonding happen? To satisfy the .........
Octet Rule
100
Researching for the sake of knowledge is known as….
Pure Research
100
Anything that has mass and takes up volume.
What is matter?
100
A law stating that the pressure of a given mass of an ideal gas is inversely proportional to its volume at a constant temperature
Boyle’s Law
100
2H2 + O2 → 2H2O
Using the chemical formula above, how many moles of oxygen are needed to complete the reaction with 4 moles of hydrogen?
What is 2 Moles of Oxygen
200
What elements are least likely to chemically bond with other elements?
Noble Gases
200
What is the difference between precision and accuracy?
Accuracy refers to how close a measured value is to an accepted value.
Precision refers to how close a series of measurements are to one another.
200
Solid, liquid, gas, plasma
What are the four states of matter?
200
2.0 mol of an ideal gas are contained in a 3.0L container at a temperature of 25∘C. The gas exerts a pressure of 16 atm on the container.
If pressure is kept constant, what is the final volume of the gas if the temperature of the container is increased to 200∘C?
4.8 L
200
Find the empirical formula for the following measures:
37.6g C
2.0g H
41.6g Cl
18.8g O
C8H5Cl3O3
300
What type of bond will form between the two atoms of oxygen?
Nonpolar Covalent
300
How many significant figures does 370.000 and 0.0002 have?
6; 2
300
Liquids (About Volume/Shape)
What has a definite volume but no definite shape?
300
278 liters of an ideal gas is in an isolated container at 30 degrees Celsius. The container is heated at constant pressure until its volume is doubled. What is the new temperature of the gas?
333 degrees Celsius
300
CaCl2 + 2NaHCO3 → CaCO3 + 2NaCl + H2O + CO2
For the amount of Calcium Chloride needed to completely react and 10 moles of Sodium Bicarbonate, how many grams of CO2 would be made?
What is 220g
400
Draw a Lewis Dot Structure from BH3 and determine whether it satisfies the octet rule, and what type of bonding is happening.
No, this would be an exception because boron gets 6 electrons and hydrogen is satisfied with 2. The bond would be covalent.
400
What are the 5 signs of a chemical change?
Gas Production
Temperature Change
Gives Out Smell or Emits Light
Precipitation
Color Change
400
They are considered acids. (Ph Levels)
What do scientists consider any substances that have a pH of 0-6?
400
Calculate the volume that a 0.323-mol sample of a gas will occupy at 265 K and a pressure of 0.900 atm .
7.81 Liters
400
A chemical substance has 47% K, 14.5% C, and 38.5% O. If the molar mass is 166.22g/mol, what is the molecular formula? Hint: First find the empirical formula.
K2C2O4
500
What are the 3 types of chemical bonds? Explain how they function and one compound that uses each of these bonds.
Covalent Bond: A bond that involves the sharing of electron: Water(H20, Ammonia NH4)
Ionic Bond: Complete transfer of valence electrons from one atom to another: Sodium Chloride NaCl, Sodium Fluoride NaF
Metallic Bond: sharing of free electrons between many positive ions: Most metals such as Iron Copper Zinc Aluminium etc.
500
What is 343.24 km in scientific notation?
3.4324 x102 km
500
One can be changed back, the other can never be changed once it occurs. (Reaction Types)
What is the difference between physical reaction and chemical reactions?
500
A sample of oxygen gas has a volume of 150.0 mL when its pressure is .947 atm. What will the volume of the gas be if it is lowered to a pressure of 0.658 atm and the temperature remains constant?
216 mL
500
C2H4O2 + 2NaHCO3 → NaC2H3O2 + 2H2O + CO2
For any amount of acetic acid, how many grams of sodium bicarbonate would be needed to make 246g of sodium acetate? Hint: Is the equation balanced?
What is 252g