Answer: the sun's rays is one of the raw Materials recquired by plants to make food
Explanation:plants trap light used in splitting water into hydrogen ions and oxygen molecules
 
        
             
        
        
        
Because the Earth rotates through two tidal bulges every lunar day.
        
             
        
        
        
Compare the initial mass to the final mass.
        
             
        
        
        
4 atoms 
Explanation:
On the product side, we expect to find 4 atoms of the product. 
     An atom is the smallest indivisible particle that takes part in a chemical reaction. 
     An element is a distinct substance that cannot be split-up into simpler substances. Such substances consist of only one kind of atom. 
     In this reaction we have: 
        2 elements:             Mg                O
on the reactant side: 
    We have two moles of Mg:   2 atoms of Mg
             1 mole of oxygen gas:   2 atoms of O
                              total atoms:    4 atoms
 According to the law of conservation of matter "in a chemical reaction, matter is neither created nor destroyed". 
 We expect to find 4 atoms of products which is MgO on the product side. 
               2Mg + O₂ →  2MgO + heat 
Learn more: 
Conservation of matter brainly.com/question/2190120
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