Reference no: EM132362991

Question 1

1. What is 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.

2.What is the mass of sodium chloride used to make a 100 mL solution at a concentration of 1.5 M?

Your solution must include a step-by-step solution with units included throughout.

3. Compare and contrast between fission and fusion.

Provide an example of each in your response.

4.List an example of each of the following: acid, base, strong electrolyte, weak electrolyte, non-electrolyte.

Explain why each of your examples given matches the definition.

5.Given the reaction between ammonia and oxygen as 4NH₃ + 5O₂ 4NO + 6H₂O:

- Calculate the amount of nitrogen monoxide (in grams) produced if 0.5 g of ammonia is reacted with 0.5 g of oxygen.

-Indicate what the limiting reactant is.

Your solution must include a step-by-step solution with units included throughout.

6. As a birthday balloon is filled with helium, the amount of helium increases from 0.5 moles of helium to 5.5 moles of helium. If the initial volume of the balloon is 2.5 mL, what is the final volume? Your solution must include a step-by-step solution with units included throughout.

7. The density of table salt is 2.16 g/cm³. Detail the conversion into units of pounds per liter, and provide the density in lb/L.

Your solution must include a step-by-step solution with units included throughout.

8. 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 5.6 g of the compound from a liquid at 30.0 °C to a gas at 60.5 °C?

Your solution must include a step-by-step solution with units included throughout.

9. Water has a specific heat of 4.18 J/g- °C. What is the quantity of energy (in kJ) required to increase the temperature of a 50.0 g sample of water from 25 °C to 99 °C?

Your solution must include a step-by-step solution with units included throughout.

10. An electron transitions from n = 5 to n = 3 in a hydrogen atom. What is the energy required for this transition? Is energy emitted or absorbed in the transition?

Your solution must include a step-by-step solution with units included throughout.

11. For the nitrite ion (NO₂-), identify: How many total lone pairs are in the ion?