A buffer is prepared containing 0.75 M NH3 and 0.20 M NH4 . Calculate the pH of the buffer using the Kb for NH3. g

pH=8.676

Explanation:

Given:

0.75 M

0.20 M

The objective is to calculate the pH of the buffer using the kb for

Formula used:

pH=14-pOH

Solution:

On substituting salt=0.75 and base=0.20 in the formula

pH=14-pOH

On substituting the pOH value in the above expression,

pH=14-5.324

Therefore,

pH=8.676

d: the voltage of the secondary coil is less than that of the primary coil.

im not suree sorry if wrong

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).