Q is a solution containing 4.2g hydrogen chloride acid in 250cm³. If 16.20cm³ of Q completely neutralized 25cm³ of R(sodium hydroxide solution). Calculate a. concentration of the alkalis in mol/dm³. b. the volume of Q that will neutralize a solution containing 0.25mols of R in cm³. NaOH + HCl NaCl + H2O.​

the tides are influenced by both the moon and the sun, it's easy to see that when the sun lines up with the moon and the earth, as during a new moon or full moon, the tidal effect is increased. these are known as spring tides, named not for the season, but for the fact that the water "springs" higher than normal. on the other hand, if the sun and the moon are 90 degrees apart in relation to an observer on earth as during the first quarter moon or third quarter moon, then high tides are not as high as they normally would be. this is because despite its greater distance, the sun's mass allows it to exert enough gravitational force on the oceans that it can negate some of the effects of the moon's pull. this phenomenon of lower high tides is called a neap tide. if you need more information on this topic visit moonconnection.com.

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.

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