Molarity is a way to express the concentration of the solution. It is defined as the number of moles of solvent per one liter of solution.
Molarity = number of moles / volume in liter.
The number of moles = 0.70 mol as given. The volume = 250 ml = 250/1000 liter = 0.25L.
Molarity = 0.70/0.25 = 2.8M
To extract hydrogen from water, researchers insert two electrodes across the water and pass current, which can separate the hydrogen from water. The process called electrolysis of water. ... An electric field applied through the cobalt oxide to water molecules resulted in the electrolysis of water
44 amu because oxygen has an atomic weight of 16, and 16 plus 16 is equal to 32, and the atomic mass of carbon is 12, and 32 plus 12 is 44.
Answer:
B. City B
Explanation:
From the weather chart, you can see that rain is indicated by the dot(.) sign. One dot means light rain and two dots mean steady light rain. The circle shading will show how much cloud in the city, ranging from no cloud(white circle), half covered (half black circle) and completely covered(black circle).
City A has neither cloud nor rain.
City B is completely covered by cloud and have steady light rain.
City C is half-covered with cloud, without rain.
