sy: A sample of a substance whose only oxidizable material is tin in the +2 state, is titrated with a dichromate solution that was prepared by dissolving 1.226 6 of KyCr, o, in enough water to give a volume of 250.00 cm3. A. 0.0821 g sample of the substance required a volume of 23.90 cm3 of the titrant to reach the equivalence point. The product of the oxidation of the tin in the +2 state is to tin In the +4 state. The reduction product of the dichromate , is chromium in the +3 state. Calculate the % of tin in the substance. (NB: Assume the reaction to take place in acidic medium)​

How can the periodic table be used to predict the behavior of elements?

Astudent made the lewis dot diagram of a compound as shown. mg is written with two dots shown on its top. an o is written on each side of mg. each o has six dots around it. an arrow is shown from one dot on mg toward the vacant space around the o on the right. another arrow is shown from the other dot on mg toward the vacant space around the o on the left. the title of the art is students lewis dot model. what is the error in the lewis dot diagram? an o atom should transfer all its six electrons to mg because the formula is mgo. both electrons of mg should be transferred to one o atom because the formula is mgo. the electrons should be transferred from each o atom to mg because mg has fewer electrons. the number of dots around mg should be four because it has to transfer two electrons to each o.

Large crystals are formed when igneous rocks cool very slowly igneous rocks cool very quickly sedimentary rock is eroded metamorphic rocks change into igneous rock