Density
What is the formula for density?
D = M/V
Name 3 solutes in Gatorade
Sugar, salt, dye, and others
Which type of physical change occurs when you rip a piece of paper?
- Reversible Deformation
- Irreversible Deformation
- Change in State
- Dissolution of a solute
Irreversible Deformation
An atom of which element has more mass, helium or lithium?
Lithium.
Danish longball is a simplified version of what game?
Cricket
Density - 4.5 g/cm3
Volume - 2 mL
Mass - ?
9 grams
How would you separate a mixture of sand and corn?
You would use a sieve.
What are 3 signs that a chemical change occurred?
1. Permanent change in color 2. Significant change in temperature 3. Formation of a precipitate 4. Release of a gas 5. Emission of light
Draw a Rutherford Bohr diagram for magnesium
Please find answer online
How many color lines are there in the new gym?
4 (black, red, green, white)
Mass - 45 grams
Volume - 3450 mL
What is the density, in g/L
13.04 g/L
Describe the process of distillation, with all changes of state mentioned.
You boil/evaporate water from the mixture, then condense it to catch the water vapor.
2Na + Cl2 ----> 2NaCl
How many total molecules are on each side of the equation?
Is this an example of a synthesis or decomposition reaction?
There are 3 molecules on the reactants side, and 2 on the products, it is an example of a synthesis.
Noble Gases
What are three different ways you could get to 12 points in NFL football?
Field goal x 4
Field goal, touchdown, safety
Two touchdowns, miss both extra points
There are many others!
M - .45 g
V - 30 mL
What is the density? What state of matter is this substance likely to be?
0.015 g/mL and a gas.
Describe two ways you could separate food colouring from water.
Distillation and using chromatography paper.
CH4 + 2O2 ---> CO2 + 2H2O
This is the chemical equation for the burning of candle wax. Which reaction is this a good example of?
It is a combustion, or rapid oxidation.
Point to the staircase on the periodic table and describe one property of the family of elements above it.
What is the distance from the end line to the half line on the Bialik soccer field, in meters?
50 meters
Mr. Raffi has a cube that measures 3.5 cm3 on each side. When he places it in water, it floats partially submerged, displacing 12 mL of water. What is the density of Mr Raffi's cube?
The volume is Mr. Raffi's cube is 3.5 x 3.5 x 3.5 = 42.88 cm3
The mass of Mr. Raffi's cube is equal to the mass of the water that is displaced. In this case, because 1 g of water has a volume of 1 mL, the mass of Mr. Raffi's cube is 3.375.
12/42.88 =0.28 g/mL
Describe the Tyndall effect and whether it would be present for a suspension, colloid and solution.
It is the ability of particles to reflect light based on their size. It is present for suspensions and colloids but not solutions.
During the demo, we combined aqueous lead nitrate with aqueous potassium iodide to form potassium nitrate (aq) and lead iodide (solid).
This was an example of which sign of a chemical reaction?
Determine the number of protons, neutrons and electrons for Potassium.
A pickleball game is played until what score?
11