Unit 1: Tools of the Chemist
The answer resulting from 154.7 + 891.6 rounded to the correct significant figures
What is 1046.3?
Bromine has a reddish-brown color is an example of...
What is a chemical property?
Lewis Dot Structure for Carbon (C)
On white board
Two methods to separate mixtures
What are distillation and filtration?
Amount of picoliters in 74.6 L
What is 74600000000000 L?
What is D=m/v?
When water is going from liquid to a solid, the phase change is ...
What is exothermic?
The region most likely has electrons present
What is an orbital?
An example of magnesium in the excited state
Answers may vary
Lewis Dot Diagram for CaS
On whiteboard
The equation to find percent error
What is the absolute value of the measured value - accepted value divided by the accepted value multiplied by 100?
Example of a physical change for water
Answers may vary
H2O (s) <--> H2O (l)
H2O (l) <--> H2O (g)
H2O (s) <--> H2O (g)
The charge of an oxygen nucleus
What is +8?
Bohr model for potassium-39
on whiteboard
Miss T.'s favorite Disney princess.
Who is Ariel (The Little Mermaid)?
The density of a cube with a volume of 27.6 cm^3 and a mass of 259.4 g
What is 9.40 g/cm^3?
The mass of water is 14 g. The amount of energy absorbed as the water becomes a gas is...
What is 31640 J?
The model that claims atoms have small, negatively charged particles as part of their internal structure.
What is the Thomson model?
The average atomic mass of sodium when the natural occurring isotopes are as followed: Na-22 = 5.14%, Na-23 = 87.99%, and Na-24 = 6.87%
What is 23.02 amu?
The initial temperature of 28 g water was 68 degrees C. If 3160.08 J is being released, the final temperature is...
What is 41 degree C?
The percent error between Miss T.'s measurement of 8.75 g/cm^3 when the true density was 8.96 g/cm^3.
What is 2.34%?
The energy needed to change the temperature of 87 g of water from 78 degrees C to 99 degree C.
What is 7636.86 J?
Explanation as to why Cu-63 and Cu-66 are isotopes in terms of subatomic particles
What is that they have the same number of protons and electrons, but different numbers of neutrons
The electron configuration of Copper
What is 2-8-18-1
Explanation of the flame test.
What is that the atom gets heated up, making the electrons jump to an excited state. As the electrons cool down, they release energy in the form of light. That is the different color we see?