[Lodve]

A rock is placed on a balance and its mass is determined as 12.1 g. When the rock is then placd in a graduated culynder that originally contains 11.3 mL og water, the new volum is roughly 17 mL. How should the density of the rock be reported?

This task doesn't seem hard at all for those who have had chemistry, but I don't know why I can't solve it. I'm relatively new here, so don't get irritated if I post easily tasks. I've never had chemistry before, so it's kinda new for me

[Borek]

What is definition of density?

[Lodve]

mass divided to volum?

[Borek]

Good. Can you calculate mass and volume from a given data?

[Lodve]

Ahhh, you just divide 12.1g to 17mL which will give 0.711g/ml?
You know, I don't have the answer to this question

[DrCMS]

Ahhh, you just divide 12.1g to 17mL which will give 0.711g/ml?

No you forgot to account for the volume of the water.

[Lodve]

How am i going to do that?

[Borek]

Final volume is initial plus volume of the solid.

[opti384]

Well according to Archimedes' principle, "Any object, wholly or partially immersed in a fluid, buoyed up by a force equal to the weight of the fluid displaced by the object," which means in simple words, the volume of displaced fluid is equal to the volume of the sunken object.

[q455923354]

A rock is placed on a balance and its mass is determined as 12.1 g. When the rock is then placd in a graduated culynder that originally contains 11.3 mL og water, the new volum is roughlyhermes 17 mL. How should the density of the rock be reported?

This task doesn't seem hard at all for those who have had chemistry, but I don't know why I can't solve it. I'm relatively new here, so don't get irritated if I post easily tasks. I've never had chemistry before, so it's kinda new for me Tongue

[JGK]

A rock is placed on a balance and its mass is determined as 12.1 g. When the rock is then placd in a graduated culynder that originally contains 11.3 mL og water, the new volum is roughly 17 mL. How should the density of the rock be reported?

This task doesn't seem hard at all for those who have had chemistry, but I don't know why I can't solve it. I'm relatively new here, so don't get irritated if I post easily tasks. I've never had chemistry before, so it's kinda new for me

Sorry Lodve but this isn't chemistry at all. It's mostly Mathemetics with a tiny bit of physics.

[Valheru]

17-11.3=5.7 ml

1 ml = 1cm³

12.1g/5.7cm³ = 2.12g/cm³

Correct me if i'm wrong

[Lodve]

I think I just divide 12.1g to 17mL since the volume is increasing after the stone is placed on the graduated cylinder. I don't think this task wasn't meant to be that hard

[Borek]

This way you are ignoring fact that you started with 11.3 mL of water.

[DrCMS]

I think I just divide 12.1g to 17mL since the volume is increasing after the stone is placed on the graduated cylinder. I don't think this task wasn't meant to be that hard

The task isn't that hard if you have a brain.  How many times do you need to be told this is wrong and that you need to take into account the volume of water before you actual listen?