Answer:
15
Explanation:
Since the law of conservation of mass applies to all the chemical reactions this will also end in 10+5 equalling 15 grams
 
        
             
        
        
        
<em>The continental crust is up to 70 km thick.</em>  
<u>Explanation</u>:
Upto 40% of the earth is made up of continental crust. <em>Sedimentary, igneous and metamorphic ricks </em>make up the continental crust. It makes up the upper layer of <em>continents and shallow seabed</em> areas near the shores.  
<em>Continental crust</em> is thicker than oceanic crust with a thickness ranging from <em>25 km to 70km continental crust</em> makes up 70% of earth’s volume and is usually located above sea level with a few exceptions like the <em>Zealand continental crust</em> region which is largely under water.