Homework Help Forum: 6th grade

Posted by Anonymous on Monday, October 12, 2009 at 5:06pm.

How could you identify a pure metal if you have a balance?

• 6th grade - bobpursley, Monday, October 12, 2009 at 5:13pm

  You have to determine density: mass/volume There are two main methods of doing that. mass the object alone, and submerged in water. density= massalone/volume but if you mass the object underwater, its mass is reduced by bouyancy, which is volume*densitywater. massinwater= volume*densitywater so volume= massinwater/densitywater densitymetal= massalone*denstiywater/massinwater Then, compare your measurement with the known density of pure metals.

  
  

• 6th grade - marwa, Thursday, November 5, 2009 at 8:56pm

  hvuhdjch

  
  

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