1. a mixture of naoh and na2co3 solution required 20.50 ml of 0.5 m hcl using
phenolphthalein as indicator. the same amount of alkali mixture when titrated using
methyl orange as an indicator required 27.25 ml of same acid. obtain an expression
for the volumes of acid required to neutralize (i) koh and (ii) na2co3 present in
solution

Match the formula for the following compound:   magnesium sulfate heptahydratemgs·7h2omg2so4·7h2omg(s o4)2·7h2omgso4·7h2o

Animals that reproduce sexually either do it through external or internal fertilization. read the following statement and decide if it is true or false. birds reproduce through external reproduction which is because the female will then be able to protect the egg.

Which of the following statements is true about energy quantization at the atomic level? electrons in the outermost orbits are the most stable. electrons in all the orbits around the nucleus have the same amount of energy. electrons in the orbit closest to the nucleus have the least amount of energy. electrons absorb or release the same amount of energy independent of the energy levels.