Rachel Maddiee Posted December 21, 2019 Share Posted December 21, 2019 #8 The density of the copper sample is unknown. The known values include the initial and final volumes and the density of a vessel. density = 30 mL initial volume = 5.0 g final volume = 40 mL Volume of sample = final volume - initial volume Is this correct what I have so far?? Link to comment Share on other sites More sharing options...
studiot Posted December 21, 2019 Share Posted December 21, 2019 16 minutes ago, Rachel Maddiee said: Is this correct what I have so far?? Is density measured in mL ? Is volume measured in g ? Let us try this again The copper sample sinks to the bottom and does not absorb any water or dissolve. so all the rise in in water level is due to the volume of copper sample. So volume of copper sample = water level after copper added - water level before copper added = ? units? Mass of copper = 5g (given) So density of copper sample = mass of copper sample / volume of copper sample = ? units ?? 1 Link to comment Share on other sites More sharing options...
Rachel Maddiee Posted December 21, 2019 Author Share Posted December 21, 2019 40 - 30 = 10 units 5g/10 = 5 units Link to comment Share on other sites More sharing options...
studiot Posted December 21, 2019 Share Posted December 21, 2019 I put units ? for you to put in the correct units. !!!!!! 5g/10 when did you ever put units as well as the numbers into the formula for calculation ? density = 5 /10 = ? and I did ask you what the units for density are. Hint they are something per something else. Link to comment Share on other sites More sharing options...
Rachel Maddiee Posted December 21, 2019 Author Share Posted December 21, 2019 Density is in mL? g/mL The density of the copper sample is unknown. The copper sample sinks to the bottom and does not absorb any water or dissolve. so all the rise in water level is due to the volume of copper sample. So volume of copper sample = water level after copper added - water level before copper added = ? units? 40 mL - 30 mL = 10 mL Mass of copper = 5g (given) So density of copper sample = mass of copper sample / volume of copper sample = ? units ?? 5g/10mL = 0.5 g/mL Does this work?? In my textbook the units are labeled. Link to comment Share on other sites More sharing options...
studiot Posted December 21, 2019 Share Posted December 21, 2019 27 minutes ago, Rachel Maddiee said: 5g/10mL = 0.5 g/mL Yeah that the best way. 1 Link to comment Share on other sites More sharing options...
Rachel Maddiee Posted December 21, 2019 Author Share Posted December 21, 2019 Did I label everything correctly including steps? Link to comment Share on other sites More sharing options...
studiot Posted December 22, 2019 Share Posted December 22, 2019 2 hours ago, Rachel Maddiee said: Did I label everything correctly including steps? Yes but you should remove these bits from your answer ( in two places) Quote = ? units ?? Link to comment Share on other sites More sharing options...
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