In some chemical reaction, the rate at which the amount of substance changes with time is proportional to the amount present. If 100 liters of chemical substance reduces to 70 liters during the first 10 hours of the reaction, how many liters of chemical will remain after another 12 hours

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

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the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l