Chemistry, moles?

Question

9. A centimeter is what part of a meter?
1
1/10
1/100
1/1000
unable to determine

10. In chemistry how do we deal with the atomic mass unit (amu)?
substitute grams/mole for amu and round to the nearest tenth decimal place
substitute grams/mole for amu and round to the nearest one decimal place
substitute mole/gram for amu and round to the nearest tenth decimal place
substitute mole/gram for amu and round to the nearest one decimal place

11. Which piece of equipment would you choose to most accurately measure 25.0 ml of water?
a graduated cylinder
a beaker
a thermometer
a test tube

13. What is the density of an object having a mass of 8.0g and a volume of 25cm3?
(*Hint mL = cm3)
0.32 g/cm3
2.0 g/cm3
3.1 g/cm3
200 g/cm3
none of the above

Answer 1

9. 1/100

10. Substitute grams/mole for amu and round to nearest tenth decimal place.
moles(n) = grams / amu

11. A graduated cylinder

12. Density = mass / volume
Density = 8.0g / 25 cm^3 = 0.32 g/cm^3

Answer 2

particular, i will help you keep face, even if it really is purely a sketch face. you want fifty 8 mL of a nil.4M answer: (0.4 mol solute) / (a million L sol'n) x fifty 8 mL x (a million L) / (1000 mL) This very last time period is a conversion aspect. i take advantage of them lots. If a million L = 1000 mL [through definition] then a million = (a million L) / (1000 mL) and also you could multiply any volume through 1 million without replacing it. Cancel out the contraptions and also you have to be left with moles of solute. You did not favor the molecular weight to sparkling up the challenge, yet measuring out a mole of aluminum sulphate is dicey agency with no good mole-o-meter, so maximum chemists convert moles to grams: ??? mol solute x (342 g solute) / (a million mol solute) [the molecular weight you calculated; i did not verify, notwithstanding it style of feels sensible] = ??? g solute What you've been searching for?

Answer 3

Safely & Permanently Remove Moles, Warts and Skin Blemishes

Answer 4

9. 1/100

10. this doesn't make sense to me, there should not be a decimal place, i think the answer may be the scond one

11. graduated cylinder

13 8/25 = 0.32 g/cm3

Answer 5

1 a
11 a
13 .32 g/cm³

There is no way to know 10...it depends on what you are expected to round to but it is grams/mole

Answer 6

sorry only have two

9. 1/100
try this
K.ing
H.enry
D.ied
D.rinking
D.elicious
C.hocolate
M.ilk
in place for
K.ilo
H.ecto
D.eka
unit (like gram, meter)
D.eci
C.enti
M.illi

11. graduated cylinder