Equations
Matter
Chemical Reactions
Chemistry
Chance
100
d=m/v represents the ...
Density formula
100
Must have both mass and volume
matter
100
Every chemical reactions begins with 1 or more
reactants
100
Name 3 things bonds can do in a chemical reaction
break form rearrange
100
Why should you always do multiple trials in a science experiment?
Make the results more accurate To obtain accurate/precise data
200
What is the volume of a couch with a mass of 1600 kg and the density is 1.6 kg?
V = m/D V= 1600 kg/1.6 kg/cm3 V = 1000 cm3
200
All matter is made of
atoms
200
If the chemical reaction produces 250 grams of CO2, then how many grams of Carbon and Oxygen were needed to start the chemical reaction? a. 750g b. 500 g c. 250 g d. 125 g
Reactants mass = Products mass c. 250 g
200
What is it called when a substance - Measures 0-6 on the pH scale - tastes sour - conduct electricity
Acid
200
The variable that changes in an experiment
independent variable Bonus: How many variables can be changed in an experiment?
300
Jihad placed a rock in 120ml of H2O and the volume rose to 189ml. What is the volume of of the rock? a. 59 ml b. 69 ml c. 309 ml d. 22,680 ml
b. 69 ml V= V2 - V1 V= 189 ml - 120 ml V= 69 ml
300
Why are atoms smaller than cells?
cells are made of atoms
300
Name 3 ways you can you speed up or slow down the rate of a chemical reaction? Hint: Alka seltzer lab
Temperature Surface Area Concentration Bonus: 90 second textbook challenge What does a catalyst do to a chemical reaction?
300
Water measures ____ on the pH scale. And is ______
7 and is Neutral
300
Which scientist is known for the following? a. Periodic Table b. Law of Conservation of Mass c. Model of the Atom d. Radioactive Decay/Half Life e. Law of Forces
a. Dimitri Mendelev b. Antoine Lavoisier c. Niels Bohr d. Marie Curie e. Isaac Newton
400
An atom has 6 protons, an atomic mass of 14, and a charge of 0. How many electrons and neutrons does it contain? a. 6 electrons and 2 neutrons b. 6 electrons and 8 neutrons c. 8 electrons and 0 neutrons d. 8 electrons and 6 neutrons
b. 6 electrons and 8 neutrons protons = electrons neutrons = mass - e neutrons = 14-6 neutrons = 8
400
A Helium atom has 2 protons and a charge of -1. How many electrons does it have?
3 electrons
400
Balance the following equation ___CH4 + __O2 --> 6CO2 + __H2O How many atoms of Oxygen were used in the reactant?
6CH4 + 12O2 --> 6CO2 + 12H2O Therefore, there 24 Oxygen atoms were used as a reactant.
400
a. Identify the 3 types of Bonding b. Which involves 2 nonmetals joining together? c. Which conducts electricity?
a. Ionic, Covalent, and Metallic b. Covalent Bonding c. Ionic Bonding Bonus: 60 sec challenge How are metals different from each?
400
Identify the following 10 elements correctly in 60 secs. 1. Mercury 2. Titanium 3. Gold 4. Chlorine 5. Lead 6. K 7. P 8. Fe 9. Na 10. Sn
1. Hg 2. Ti 3. Au 4. Cl 5. Pb 6. Potassium 7. Phosphorus 8. Iron 9. Sodium 10. Tin
500
Review Item #49
C. 301.15 K
500
Review Item # 2
g. the arrangement of the atoms because they are broken or formed and then recombined to make a new product
500
Review Item # 5
b. endothermic because its releasing heat
500
See item # 7
b. the rate of the reaction would decrease because its less concentrated
500
How would you know a chemical reaction occurs? Give 3 examples of a chemical reaction outside the body. Give 3 examples of a physical change
A new substance was created Paper burning, tarnishing, food fermenting/spoiling, Metal rusting, decomposition, cooking food melting, tearing, crumbling, dyeing crushing, freezing, boiling, stretching
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