Scientific Inquiry
How can you generate confidence in a hypothesis?
A. Eliminating predictions.
B. Repeated testing without falsification
C. Using the correct science equipment
D. Using a great hypothesis
B. Repeated testing without falsification
Name the two regions of an atom and where the three subatomic particles reside in the two regions. (Protons, Neutrons, Electrons)
Nucleus: Protons and Neutrons
Orbitals (Valence Shells): Electrons
What is the term and symbol (Abbreviation) for the value shown below?
1:1,000,000?
Term: Parts per million
Symbol: ppm
Hydroxide Bases release H+ into an aqueous solution in which increases [H+] in the solution. True or False?
A. True
B. False
B. False
Based on the graph shown separately, what type of scientific relationship is represented?
A. Negative Indirect Relationship
B. Positive Direct Relationship
Positive direct relationship.
A patient reports severe stomach and head pain. The doctor observes the patient and finds swelling in the brain, and inflammation of the stomach lining. Which is a sign and which is a symptom.
A. Symptom, sign
B. Sign, Symptom
A. Symptom, Sign
What is the number of protons, neutrons, and electrons for the neutral atom Boron?
Protons = 5
Neutrons = 5
Electrons = 5
In liquid water, the action of forming/reforming H-
bonds allows H2O molecules to condense like a crowd at a party. Which water property does this describe?
A. Expand upon freezing
B. High Heat Capacity
C. Cohesion and Adhesion
D. Dissociates and Dissolves
A. Expand upon freezing
Most buffers are weak acids that resist change in pH.
True or False.
A. True
B. False
A. True
The ion Fe+2 is associated with which function of ions?
A. Muscle Contraction
B. Neuron Function
C. Bone Formation
D. Oxygen Transport
E. Ventilation Homeostasis
D. Oxygen transport
Name the four things science seeks from nature.
Match the atom with the correct equation.
Isotope
Ion
Neutral
Protons not = to Electrons
Protons not = to Neutrons
Protons = Electrons = Neutrons
Isotope: Protons not = to Neutrons
Ion: Protons not = to Electrons
Neutral: Protons = Electrons = Neutrons
Water molecules form hydration shells around ions and about partially charged molecules (opposite charge attractions). Which water property does this describe?
A. Expand upon freezing
B. High Heat Capacity
C. Cohesion and Adhesion
D. Dissolves and Dissociates
D. Dissolves and Dissociates
Compare the pH of 5 and pH of 11. Which is more acidic and by how many times?
pH 5 is 1,000,000 (106) times more acidic than pH 11.
Water disassociates salts into:
A. Smaller salt molecules
B. Carbonic Acid
C. Ions
D. Bicarbonate
C. Ions
List the 6 steps of the hypothetic-deductive method.
Observation, Hypothesis, Prediction, Test, Results, and Conclusion
A bond that has a very strong relative strength, shares electrons equally and is not likely to dissociate in H2O. Which bond does this describe?
A. Polar Covalent Bond
B. Ionic Bond
C. Nonpolar Covalent Bond
D. Hydrogen Bond
C. Nonpolar Covalent Bond
What is the molarity of a solution that contains 10 grams of Silver Nitrate (AgNO3) that has been dissolved in 750 mL of water?
0.078M
What is the pH of a solution that has a [-OH] of 4?
pH = 10
Which is the correct equation for all solutions that range from 0-6 (Acidic) on the pH scale?
A. [H+]>[OH-]
B. [H+]=[OH-]
C. [H+]<[OH-]
A. [H+]>[OH-]
Male octopuses are split into two groups. One is tested on and the other is not. The octopus group that is tested on is given a pair of glasses to make them appear less threatening to female octopuses. The female octopuses are fed before the experiment is conducted to rule out hunger. The male octopuses are still strangled by females even with the glasses. The recorded number of strangulations stays the same. Define the control group, experimental group, experimental variable, confounding variable, and dependent variable from this example.
Control Group: Octopus group that was not tested on.
Experimental Group: The octopuses that were given the glasses.
Experimental Variable: The glasses.
Confounding Variable: Hungry Female Octopuses.
Dependent Variable: Recorded number of strangulations.
A δ+ region of one molecule can attract to a δ– region of another molecule or ion forming a physical bond.
When such a bond involves H atoms we call it a _________.
A. Nonpolar Bond
B. Polar Bond
C. Hydrogen Bond
D. Ionic Bond
C. Hydrogen Bond
Find the volume of a 0.75 M solution if it contains 39 grams of potassium hydroxide (KOH).
0.93 L or 930mL
What is the [-OH] when the [H+] = 8?
[-OH] = 10-6
Find the molarity of a solution made from 275 g of CuSO4 dissolved in enough water to make 4.25 L.
0.405M