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1.
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Question 1
10 Points
Scientific Method.
a. List the steps of the Scientific Method.
b. Create an example of a scientific study that could be done in terms of the steps of the scientific method. Be creative, and describe the study in terms of the steps of the scientific method.
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2.
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Question 2
10 Points
Complete the following table (or provide answers for each)
Definition | Example | The reason the example fits the definition | |
Acid | |||
Base | |||
Strong Electrolyte | |||
Weak Electrolyte | |||
Non-Electrolyte |
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3.
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Question 3
10 Points
What is the mass of sodium chloride used to create a 250 mL solution at a concentration of 3.5 M? To earn credit, your solution must include a step-by-step solution with units included throughout to support your final answer.
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4.
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Question 4
10 Points
In your own words, define and compare fission and fusion (be specific). Provide a balanced, nuclear equation for each.
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5.
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Question 5
10 Points
Given the reaction between ammonia and oxygen as 4NH3 + 5O2 4NO + 6H2O:
a. Calculate the amount of nitrogen monoxide (in grams) produced if 0.8 g of ammonia is reacted.
b. Calculate the amount of nitrogen monoxide (in grams) produced if 0.8 g of oxygen is reacted.
c. In comparing (a) and (b), indicate what the limiting reactant is. Explain.
To be awarded credit, your solution must include a step-by-step solution with units included throughout to support your answers.
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6.
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Question 6
10 Points
The fluorocarbon compound C2Cl3F3 has a normal boiling point of 47.6 °C. The specific heat of this compound in the liquid state is 0.91 J/g-K and in the gas state is 0.67 J/g-K. The heat of vaporization is 27.5 kJ/mol. What is the amount of heat required to convert 10.6 g of the compound from a liquid at 30.0 °C to a gas at 60.5 °C? To be awarded credit, your solution must include a step-by-step solution with units included throughout.
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7.
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Question 7
10 Points
For the nitrite ion (NO2- ), identify:
a. How many total lone pairs are in the ion?
b. What is the VSEPR molecular shape of the ion?
c. How many resonance structures can be drawn from the ion?
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8.
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Question 8
10 Points
In using the following table, note which intermolecular attractive interactions are present for each of the following substances. For each interaction, explain why you selected it or why you did not. Be specific.
Substance | Dispersion | Dipole-dipole | Hydrogen bonding | Ion-dipole |
CO (g) | ||||
AlCl3 (aq) | ||||
C2H4 |
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9.
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Question 9
10 Points
The density of table salt is 2.16 g/cm3. Detail the conversion into units of pounds (mass) and liter (volume), and provide the density in lb/L. To be awarded credit, your solution must include a step-by-step solution with units included throughout.
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10.
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Question 10
10 Points
As a birthday balloon is filled with helium, the amount of helium increases from 7.5 moles of helium to 9.5 moles of helium. If the initial volume of the balloon is 25.5 mL, what is the final volume? Your solution must include a step-by-step solution with units included throughout.
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