(MIDTERM) All short answer questions (7-14)

Question 1

How is it better to discover you were wrong than to prove you were right?

Answer 1

Discovering that your wrong helps you grow and learn your mistakes, making you stronger and more likely to ace questions you’ve missed in your past. By getting the answer right every time, you don’t learn anything.

Question 2

What stuck with you most from lessons 1 and 2 of chapter 7?

Answer 2

density, physical properties, etc.

Question 3

What omission of truth do electric vehicle manufacturers and salesmen often make when trying to sell their products to customers?

Answer 3

That electric vehicles are actually worse for the environment

Question 4

What is heavier, a pound of feathers or a pound of solid rock. Explain why.

Answer 4

they are the same wight because even if there are a lot more feathers, they still both weight a pound

Question 5

If a sneaky saleswoman was trying to sell an electronic vehicle to a potential buyer who was concerned about carbon emissions, what would they likely omit from their sales pitch?

Answer 5

That electric vehicles are actually worse for the environment

Question 6

Explain why melting points are considered size independent properties of matter, and give an example

Answer 6

Independent properties because melting points don’t need to be a certain size or shape, they just need to reach a certain temp to melt.

Question 7

You leave an inflated football outside one night. The temperature drops to 40 degrees that morning and the football seems flat. Later that afternoon the temp climbs to 88 degrees. What changes in the football would you expect and what law would explain this?

Answer 7

The football would re-inflate and this is charles’s law

Question 8

What is the final volume of a gas with an initial volume of 100 mL if the pressure decreases from 20 kPa to 10 kPa?

Answer 8

200mL

Question 9

Made of two protons and two neutrons

Answer 9

Alpha particles

Question 10

Made of high energy electron

Answer 10

Beta Particle

Question 11

If Uranium-238 experiences alpha decay, it will become Thorium?

Answer 11

234

Question 12

If the imaginary element m&m-ium has a half life of 10 seconds, and you start with 24g, how many grams will you have after 30 seconds of decay?

Answer 12

3 grams

Question 13

Nitrogen (N) contains 99.63% N-14 and 0,37% N-15. What is the average atomic mass of nitrogen

Answer 13

14.0037. Move decimal right 2 spaces and then multiply by its N-__, then add the two together after adding moving the decimal left 2 spaces.

Question 14

Recapitulate what Mendeleev realized when he first began to organize all of the elements in 1869

Answer 14

Mendeleev realized a pattern in the atomic masses that lined up with other parts of an element when placed on the table.