How many moles if mgcl2 are there in 340g of the compound?
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Ответ:
Hi!
The answer would be ~ 3.58
Explanation
You will need to use the simple formula of finding the number of moles, given the mass of the compound, which is:
number of moles of compound = mass of compound / Mr of compound
The mass in this equation is the mass of the compound you have/ are considering.
The Mr is the sum of the atomic masses of each element in the compound.
To proceed with this, you need to have two of the following values:
Mass : 340g
Mr of MgCl2 : 95
Number of moles : ?
Substituting the respective values in the equation:
number of moles = mass / Mr
number of moles = 340 / 95
number of moles = 3.58
Hope this helps!
Ответ:
Yes, it is possible to add three vectors of equal magnitudes and get zero. This can happen if the resultant of the two vectors are equal and opposite in direction to the third vector.