Answer:
A
Explanation:
Chlorine has one valence electron
Hence one chlorine atom reacts with 2 atoms of lithium
And also reacts with 3 atoms of boron
Explanation:
divide the weight in grams by the atomic mass from the periodic table, then multiply the result by Avogadro's number..
Hope this works!!
South ????????????????????????
Solid substances cannot raise to the top of the ‘card’. They need to be in liquid form.
Answer:
Approximately 
(note that 
.)
Explanation:
The molarity of a solution gives the number of moles of solute in each unit volume of the solution. In this 
solution in water,
Let 
be the number of moles of the solute in the whole solution. Let 
represent the volume of that solution. The formula for the molarity 
of that solution is:
.
In this question, the volume of the solution is known to be 
. That's 
in standard units. What needs to be found is , the number of moles of in that solution.
The molar mass (formula mass) of a compound gives the mass of each mole of units of this compound. For example, the molar mass of is 
means that the mass of one mole of
.
For this question,
.
Calculate the molarity of this solution:
.
Note that 
(one mole per liter solution) is the same as 
.
