A block has dimensions 1.0 dm, 4.2 cm, and 25 mm, with a mass of 5.326 kg. Calculate the density of this block in g/cm 3 .

1 dm equals about 10 cm

25 mm equals 2.5 cm

and then we have 4.2 cm, including a mass of 5.326 kg

How do we find the density of the block?

First, lets rewrite our formula.

d = mass divided by volume.

lets multiply 10 cm x 2.5 cm x 4.2 cm

this equals 105.

Now, lets turn 5.326 kg into what we need to divide.

1000 cm x 5.326 kg is 5326 cm

now lets do 5326 into 105

thats 50.  

Explanation:

50 is the answer.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.