Question1. X of pure solid substance at room temperature, if the substance is heated to230meleleh gradually. if it is then cooled to room temperature, the liquid can not be frozen
a. is it possible x element or compound. explain
b. whether the chemical changes that occur? if so it can be said menjalaniperubahanendotherm, based on the information provided?
c. can be said that the fluid elemet, based on information supplied
2. when a weight of 10 g of wax that can be burned in oxygen, carbon dioxide and water vapor formed by combustion weigh more than 10 g. This is the case in accordance with law conservation of mass, explain
3. when carbon burns in oxygen under a limited number, it will terbentuksenyawa gas.suggest ways to differentiate the two compounds with one another
4. after Mendel arrange the periodic table, he concluded that the atomic weights of certain elements govern wrong, and this conclusion seems correct. how Mendelmampu pedictthat some of the atomic weights? why the predictions are not always right, explain
5. when a dilute solution of mercury chloride was added to a solution of silver nitrate, awhite solid form. identify white solid writing equations seimbanguntuk reactionAnswer !1. A. Compounds because like the above that the substance melts, and compounds thatcan be either solid, liquid and gas, and the statement according to the characteristics ofcompounds
B. because the state tersebutsubtansi mengabil heat from the outside and the statement in accordance with the description of the reaction endotrem
C. because the problem is in saying that in the melt and surely he is solid and in accordance with the characteristics of compounds
a. is it possible x element or compound. explain
b. whether the chemical changes that occur? if so it can be said menjalaniperubahanendotherm, based on the information provided?
c. can be said that the fluid elemet, based on information supplied
2. when a weight of 10 g of wax that can be burned in oxygen, carbon dioxide and water vapor formed by combustion weigh more than 10 g. This is the case in accordance with law conservation of mass, explain
3. when carbon burns in oxygen under a limited number, it will terbentuksenyawa gas.suggest ways to differentiate the two compounds with one another
4. after Mendel arrange the periodic table, he concluded that the atomic weights of certain elements govern wrong, and this conclusion seems correct. how Mendelmampu pedictthat some of the atomic weights? why the predictions are not always right, explain
5. when a dilute solution of mercury chloride was added to a solution of silver nitrate, awhite solid form. identify white solid writing equations seimbanguntuk reactionAnswer !1. A. Compounds because like the above that the substance melts, and compounds thatcan be either solid, liquid and gas, and the statement according to the characteristics ofcompounds
B. because the state tersebutsubtansi mengabil heat from the outside and the statement in accordance with the description of the reaction endotrem
C. because the problem is in saying that in the melt and surely he is solid and in accordance with the characteristics of compounds
2. In my opinion not appropriate because in a matter of explanation and not in accordancewith the law of conservation of mass of a substance before and after the reaction is constant or the same, which in penjelasanya sedangankan antra different before and afterthe reaction because of its mass is not the same between before and after
3. the combustion reaction
4. I think mendelev correct predictions because it is capable of predicting the elements that have not in the know and predict a definite future in ketemukan new element and it wasproven, because mendelev compile atom - atom is based on the increase in mass, andprediks imendelev it right not wrong
5.HgCl2 + AlN4 = 2HgCl + 2AlN2
