Answer:
a,c and d are exothermic
b is the endothermic
Explanation:
exothermic because energy required to form products is less than the energy required to break bonds in reactants.
endothermic because energy required to form products is larger than the energy required to break bonds in reactants.
Answer:
Explanation:
From the question we are told that:
Content of Sterling silver:
Let x be sterling silver
Silver 
Copper 
Total silver available 
Generally the equation for Total amount to be made is mathematically given by
Answer:
All the carbon atoms in the human body were created in the stars. Elementary particles, such as protons, were formed during the "big bang"; that amazing moment about 14 billion years ago in which the universe got it's start.
