A piece of metal with a volume of 2.45 mL has a density of 4.255g/mL. What is the mass of the metal?

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume = 2.45 mL

density = 4.255g/mL

We have

mass = 2.45 × 4.255 = 10.42475

We have the final answer as

Hope this helps you

it is called acid bonding

"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"