Question

a sample of aluminum is placed in a 25 ml graduated cylinder containing 100ml of water. The level of water rises to 18.0 ml. Aluminum has a density of 2.7g/ml. calculate the mass of the sample. remember sig figs

Answer 1

@ash2326

Answer 2

how do i do this i know the formula is m=dxv but which one is the volume

Answer 3

do you mean containing 10 ml of water?

Answer 4

i think you mean 10.0 ml of water

Answer 5

10.1 i ment to write

Answer 6

10.0

Answer 7

so first, solve for the volume of the aluminum. you do this by subtracting initial volume from final volume so \[18.0 - 10.0 = 8.0 \]
so the volume of aluminum is 8.0 mL

are you following?

Answer 8

yes

Answer 9

so now use the formula mass = density x volume

it says the density is 2.7 g/mL and the volume is 8.0 mL so
\[m = 2.7 \times 8.0\]
just solve that and you have your answer

Answer 10

^unit is in g btw

Answer 11

its 2.2 ml

Answer 12

2.7 x 8 is not 2.2....

Answer 13

2.16

Answer 14

oh wait...if you round off..

Answer 15

yes 2.2 is right

Answer 16

ok so there another problem and it say

you place a 28.95b piece of gold in a 10 ml graduated cylinder. the level of the water rises 1.50.. what is the density of gold? you know that silver density of 10.5g/cm^3. what mass of silver will raise the level of the water in the graduated cylinder 1.50ml?

do i still subtract the volume and final volume

Answer 17

are those two separate questions?

Answer 18

no its one question on the paper

Answer 19

would i find the density of gold first

Answer 20

the phrasing of your question makes no sense for me sorry

Answer 21

is 10 mL the original volume of water in the graduated cylinder?

Answer 22

i think so

Answer 23

sorry if it doesn't make sense im writing what i see on the paper

Answer 24

can you post the EXACT question? dont paraphrase it

Answer 25

i doubt there are ellipsis in questions

Answer 26

i just but an extra period by accident, ignore it

Answer 27

one more thing is that 28.95 b piece of gold <--what is that b? o.O

just rewrite the whole question and stick to the exact words

Answer 28

ok You place a 28.95g piece of gold in a 10 ml graduated cylinder. The level of the water rises 1.50. What is the density of gold? You know that silver has a density of 10.5g/cm^3. What mass of silver will raise the level of the water in the graduated cylinder 1.50ml?

Answer 29

there's really no unit of measurement in 1.50? that's what's really bugging me for a while :/

Answer 30

ml sorry

Answer 31

okay...there's a preposition that is very important here...

is that the water rises BY 1.50 mL?

Answer 32

or is it water rises TO 1.50 mL?

Answer 33

yes

Answer 34

these grammar thingies are very important :/ that's why i was requesting for a rewrite

yes what?

Answer 35

yes its to 1.50ml

Answer 36

and you're sure that's You place a 28.95g piece of gold in a 10 ml graduated cylinder

it's really 10 mL? not 1.0 mL? because this doesnt make sense right now...

Answer 37

hold on

Answer 38

yes im sure

Answer 39

it doesnt say what the initial volume of the cylinder was?

Answer 40

no

Answer 41

then i have no idea how to solve this. unless the question was " water rises BY 1.50 mL" and not TO...this is impossible to solve since it did not give the initial volume

Answer 42

this is the paper