Answer:
Two types of substances will dissolve in water: ionic compounds, such as sodium chloride (NaCl, or table salt) and compounds composed of larger molecules that have a net charge due to the arrangement of their atoms. Ammonia (NH3) is an example of the second type.
Explanation:
Answer:
The molar mass of a molecule is the sum of the masses of each element.
Gaseous compound X is an oxidising agent. X is bubbled through separate solutions of aqueous
potassium iodide and acidified potassium manganate(VII).
Х
Х
aqueous
potassium iodide
acidified potassium
manganate(VII)
Which row shows the colour changes when X is bubbled through these two solutions?
aqueous
potassium iodide
acidified potassium
manganate(VII)
A
brown to colourless
B
brown to colourless
no change
purple to colourless
no change
с
colourless to brown
D
Answer:
Ca3P2
Explanation: find out what 66% of the molar weight of the molecule is and then find out how many moles of Ca that would be by dividing it by the molar weight of Ca
then do the same for P