Question: 
<em>What effects does the concentration of reactants have on the rate of a reaction?</em>
Answer: 
<em>Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction. This occurs because a higher concentration of a reactant will lead to more collisions of that reactant in a specific time period.</em>
<em>Increasing the concentration of reactants generally increases the rate of reaction because more of the reacting molecules or ions are present to form the reaction products. ... When concentrations are already high, a limit is often reached where increasing the concentration has little effect on the rate of reaction.</em>
Hope this helps, have a good day. c;
 
        
             
        
        
        
Answer: Boiling because it makes the molecules in water bounce around.
Hope it helps.
 
        
             
        
        
        
Answer:
Explanation:
Filtration followed by evaporation: 
To separate the mixture of sand and sugar, it is best to use the separation technique of filtration then evaporation. 
Pour the water into the mixture. The sugar will dissolve with time in the water. Sand is made up of quartz and does not dissolve in water. 
After the dissolution, filter the solution to separate the sand using a filter paper. 
Dry the sand thereafter then proceed to evaporate the sugar with water solution. Evaporation will turn water into vapor and the sugar crystals will be left behind. 
 
        
             
        
        
        
Explanation:
Sorry, I don't know, but I can tell you that when an atom, or a body, has the same amount of positive charges (protons) and negative charges (electrons), it is said to be electrically neutral. ... The net charge corresponds to the algebraic sum of all the charges that a body possesses.