Marika wants to collect a precipitate of Ca(OH)2. So she makes a 0.01 M solution of NaOH and mixes it with a 0.05 M solution of Ca(NO3)2. She finds
that the reaction is very slow. What would be the best way to increase the rate
of the reaction?
A. She could make the original solutions at lower concentrations.
B. She could use less of each solution.
C. She could make the original solutions at higher concentrations.
O D. She could reduce the temperature of the solutions.

"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"

just did the assignment and the answer was #1 +2 n

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa