HELP PLEASE An experiment calls for each student to use 3.50 g of sodium hydroxide.
There is only 78.2 g of sodium hydroxide remaining. How many students An experiment calls for each student to use 3.50 g of sodium hydroxide.
There is only 78.2 g of sodium hydroxide remaining. How many students
can complete the experiment?

Select one:
a. 22 students
b. 0 students
c. 78 students
d. 273 students

22 students

Explanation:

i just answered it for a quiz and its correct

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"

може ли да зареждате повече информация, моля