What volume of a 1.00 m stock solution of glucose must be used to make 500.0 ml of a 1.75 ✕ 10–2 m glucose solution in water? (a) 1.75 ml, (b) 8.75 ml, (c) 48.6 ml, (d) 57.1 ml, (e) 28,570 ml?

Answer : The correct option is, (b) 8.75 ml

Solution :

According to the dilution law,

where,

= molarity of stock solution = 1.00 M

= volume of stock solution = ?

= molarity of glucose solution =

= volume of glucose solution = 500 ml

Now put all the given values in the above law, we get the volume of stock solution.

Therefore, the volume of 1.00 M stock solution required volume is, 8.75 ml

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.