Melt chocolate and measure the temperature and then melt wax and measure the temperature and compare his results.
This would be true.
The reason why this answer would be true is because a fossil's position in the rock layers determine how long they died and were preserved. If the fossils were right next to each other, then that means both organisms were preserved at the same time.
Answer:
![Pb(NO_{2})_{2}_{(aq)} + 2KBr_{(aq)}----->PbBr_{2}_{(s)} + 2 KNO_{2}_{(aq)}](https://tex.z-dn.net/?f=Pb%28NO_%7B2%7D%29_%7B2%7D_%7B%28aq%29%7D%20%2B%202KBr_%7B%28aq%29%7D-----%3EPbBr_%7B2%7D_%7B%28s%29%7D%20%2B%202%20KNO_%7B2%7D_%7B%28aq%29%7D)
Explanation:
The charges are as follows:
since oxidation number of lead is 2 as indicated lead (II)nitrite. The number in parentheses indicates the oxidation number.
bears the charge -1.
As lead bears 2 positive charges so we need two nitrite ions to form lead (II) nitrite.
, it is a halogen and bears the charge -1.
, it is an alkali metal.
Since Bromide bears -1 charge and potassium bears +1 charge so we need only 1 ion of bromide and 1 ion of potassium to form potassium bromide.
Similarly, to form lead bromide we need 2 ions of bromide and 1 ion of lead, and to form potassium nitrite we need 1 nitrite ion and 1 potassium ion.
The final balanced equation is as follows, the various states of reactants and products are also written properly.
![Pb(NO_{2})_{2}_{(aq)} + 2KBr_{(aq)}----->PbBr_{2}_{(s)} + 2 KNO_{2}_{(aq)}](https://tex.z-dn.net/?f=Pb%28NO_%7B2%7D%29_%7B2%7D_%7B%28aq%29%7D%20%2B%202KBr_%7B%28aq%29%7D-----%3EPbBr_%7B2%7D_%7B%28s%29%7D%20%2B%202%20KNO_%7B2%7D_%7B%28aq%29%7D)
The molar mass of a compound tells you the mass of 1 mole ofthat substance. In other words, it tells you the number of grams per mole of a compound. The units for molar mass are, therefore, grams/mole. ... This is why you find the relative atomic mass ofcarbon in the atomic table as 12.0107 and not exactly 12.