Ametal ball has a mass of 2g and a volume of 6ml. what is the density?

The formula for density is p=m/V

p is density

m is mass

V is volume ( *this has to be capital to mean the same*)

We know the mass m is 2g

and the Volume V is 6 mL

So divided 2/6

p= 0.33333 g/mL

your density is 0.333333g/mL

Make sure to check your significant figures if that applies.  It is 1/3 or 0.3 repeating for eternity.  Also make sure to put g/mL as a classification.

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"

може ли да зареждате повече информация, моля