Answer:
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5
Answer is - Decreasing surface area of a solid reactant, rate of reaction can be slowed down.
Explanation: The quantity of a reactant species consumed or the quantity of product species formed in unit time in a chemical reaction is called rate of reaction. With passage of time, concentration of reactant decreases and concentration of product increases. Rate of reaction depends on various factors like- concentration of reactant, temperature, nature of reactant, catalyst and surface area of reactant.
By increasing the concentration of the reactants, rate of the reaction increases.
Presence of catalyst increases the rate of reaction.
With increase in temperature, kinetic energy of molecules increases which results to more number of effective collisions, so, rate of reaction increases.
With increase in the surface area of reactant, more number of molecules can react at a time and by decreasing the surface area of solid reactant rate of the reaction will diminish/ decrease.
Answer: B. They reproduce slower than unicellular organisms
Explanation:
In unicellular organisms there is a single cell which performs all the functions like digestion, respiration, and reproduction. The cell reproduce by cell division. The single parent cell divides into two identical daughter cells. But multicellular organisms exhibit multiple cells and their reproduction is complex. They reproduce by sexual mode of reproduction in which separate sex cells are produced when they fuse form zygote which is the precursor of new organism. This process is slower than that of the cell division and production of progeny by the unicellular organisms. Thus reproduction is slower in multicellular organism this is the disadvantage in multicellular organisms.
The national government was too weak to solve the nation's problems.
The Articles of Confederation were only meant to be temporary, like a stand in, until a better document, eventually known as the constitution, could be created.
Answer: Its option "A" Both A and R are true and R is the correct explanation of A.
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