Chemical Foundations
Chemical Foundations $200 $200 $200 $200 $200 $400 $400 $400 $400 $400 Density and Graphing Types of Matter Extreme Random Science! Measuring $200 $200 $200 $200 $200 $400 $400 $400 $400 $400 $600 $600 $600 $600 $600 $800 $800 $800 $800 $800 $1000 $1000 $1000 $1000 $1000
Chemistry is the study of what? 200 Chemistry is the study of what? Back Answer: matter
What is meant by “qualitative” when making observations? 400 What is meant by “qualitative” when making observations? Back Answer: no numbers are involved
How does a conclusion from an experiment become a theory? 600 How does a conclusion from an experiment become a theory? Answer: repeated experimentation by many scientists with consensus on conclusion Back
800 Write a hypothesis for an experiment addressing the following problem: The congestion in the central hallway between N and W halls is terrible during passing period. Back Answer: Many different answers
What are the four evidences of a chemical change? 1000 What are the four evidences of a chemical change? Answer: color change, gas formation, energy change, formation of a precipitate Back
Convert 0.004630 to scientific notation with the correct sig. figs. 200 Convert 0.004630 to scientific notation with the correct sig. figs. Back Answer: 4.630x10-3
What are the base SI units for mass, length, and time? 400 What are the base SI units for mass, length, and time? Back Answer: kilograms, meters, seconds
What is the reading on the following graduated cylinder? 600 What is the reading on the following graduated cylinder? Back Answer: 73.0
How many microliters are in 24 decaliters? 800 How many microliters are in 24 decaliters? Back Answer: 240,000,000 μL
1000 Calculate the density of the following substance, rounding your answer correctly. volume = 15.63 mL mass = 15.0 g Back Answer: 0.960 g/mL
What is the formula for calculating density? 200 What is the formula for calculating density? Back Answer: D = m/V
400 If a 4.5 kg sample a metal has a density of 8.3 g/mL, what is the volume of the sample in mL? Back Answer: 540 mL
600 A student makes the following measurements for the density of gold (actual density = 19.3 g/mL). Comment on her accuracy and precision. Trial 1 Trial 2 Trial 3 18.2 g/mL 18.1 g/mL Back Answer: precise but not accurate
800 If diamond has an actual density of 3.52 g/cm3 but you measure it to be 3.68 g/cm3, what is the percent error of your measurement? Back Answer: 4.55 %
What is the density of the following substance? 1000 What is the density of the following substance? Back Answer: 5 g/mL
What two types of matter are pure substances? 200 What two types of matter are pure substances? Back Answer: elements and compounds
Which of the following represents a compound? 400 Which of the following represents a compound? Back Answer: D
What type of matter is present in the following picture? 600 What type of matter is present in the following picture? Back Answer: heterogeneous mixture
800 If rubbing alcohol evaporates off of your arm, is this a physical property, chemical property, physical change, or chemical change? Back Answer: physical change
Name 2 evidences that cellular respiration is a chemical change. 1000 Name 2 evidences that cellular respiration is a chemical change. Back Answer: energy change, gas produced
Who is the principal of the school? 200 Who is the principal of the school? Back Answer: Mr. Carrol
Who is playing in the first regular season NFL game on Thursday night? 400 Who is playing in the first regular season NFL game on Thursday night? Back Answer: Steelers and Patriots
Who painted the Mona Lisa? 600 Who painted the Mona Lisa? Back Answer: Leonardo DiCaprio
What is the capital of Texas? 800 What is the capital of Texas? Answer: Austin Back
What structure in a plant cell is responsible for photosynthesis? 1000 What structure in a plant cell is responsible for photosynthesis? Back Answer: chloroplast