Answers to CHPTR 1

Chemistry CHPT 1

2.3

a. liquids vs solids

gases can conform to any shape and volume (hot temp)
while liquids can conform to any shape (average temp)

b. liquids vs. gases

liquids can conform to any shape (average heat)
while solids remain the same (cold temp)

2.4

note no matter the element it still remains said element in solid, liquid and gas states the difference is physical

a. liquid vs. solid

both of these have a definite shape

b. liquid vs gas

both of these have an indefinite volume

2.11

a. chemical
b. physical
c. physical
d. chemcial

2.15

a. F
b. T
c. T
d. F

2.17

a. hetero
b. homo
c. pure
d. hetero

2.19

a. homo, 1 phase
b. hetero, 2 phases
c. hetero, 2 phases
d. homo, 1 phase

2.21

a. compound
b. compound
c. insuff
d. element

2.25

a. elements and compound can be pure, but not all compounds are pure. F
b. i put my pen on my table and voila I have a table pen? T
c. T
d. T

2.33

b & c


3. What are the names of the elements that make up:
a. Ethanol
Oxygen, Hydrogen and Carbon

b. Table sugar
Carbon and Oxygen (this compound shape is insane!!)

c. Table salt
Sodium and Chlorine

d. Mica
This one is mean, its obviously meant as a trick question

X2Y4-6Z8O20(OH,F)4
in which X is K, Na, or Ca or less commonly Ba, Rb, or Cs
Y is Al, Mg or Fe or less commonly Mn, Cr, Ti, Li, etc
Z is chiefly Si or Al but also may include Fe3+ or Ti

thank you wikipedia

e. Bismuth
Bismuth is an element

f. Codeine
Carbon, Hydrogen, Nitrogen and Oxygen

4. What is the difference between a pure substance and an element?

All elements are pure substances while pure substances can be either an element or a compound.

5. What are the two most abundant elements on earth? What common substance do these make?

Oxygen and Silicon, which makes up!! SILICONE!

6. What do you notice about the two most common elements in the universe in regards to the periodic table? Make a guess as to why this is.

Hydrogen and Helium, my guess is that these two basic elements help to create new planets and are the easiest to manage due to their size.

7. What is the difference between a molecule and an atom? When you breathe, is your body trying to obtain a molecule or an atom?

An atom is one element by itself, a molecule is a combination of atoms. Your body wants molecules and it strips from them what it wants and reconfigures it into something else oxygen to CO2 by breathing. or CO to death.

8. How many elements make up a molecule of aspirin? How many atoms?
9 carbon. 8 hydrogen and 4 oxygen which = 21 atoms

9. How many elements make up a molecule of Ca(NO3)2? How many atoms?
1 Calcium, 2 Nitrogen and 6 Oxygen which = 9 atoms

10. Find another substance that is commonly thought of as toxic (ie bad) and find a good use for it (see "good vs bad properties for a chemical substance" on page 4).

Carbon Monoxide is bad for us to breathe because our hemoglobin love it to death, but this colourless and odorless substance is good for steel working as it helps to remove iron from their ores.

11. (4) What kind of change is it?

a. boiling acetic acid to produce acetic acid vapour
physical
b. dissolving salt into water
chemical
c. burning a batch of chocolate chip cookies
chemical
d. making acetic acid from baking soda and vinegar
chemical

12. (3) What can you say about the reversibility of physical changes versus chemical changes?

I am able to perform and physical change with just my strength but I can never seem to be able to put back together a cookie that has been broken. Though with chemical change I can keep on playing around with water turning it back into hydrogen and oxygen and back again dependant if I have the energy to do so.

Physical changes not so reversible
Chemical changes more so

BONUS

Leads latin name is Plumbous, which name has been adopted into the profession of plumbing due to lead pipe. And the most famous of video game characters that happen to be plumbers are the Super Mario Bros. Mario Mario and Luigi Mario