Determine the number of nitrate ions in 1.95 mol of nickel (III) nitrate. (For the final answer, must do significant figures) *This is a grade 11 practice question please do not answer in a level above that because I won't understand.*
*Also please show me the solutions so that I know how you got the answer* Thank you for the help because I dont understand how to answer this question

Jenny places a strip of ph paper into a solution. when she removes the ph paper, it has turned yellow-green. what should jenny do next to determine the ph of her solution? a. use a different testing method because the ph paper should not change colors b. place the ph paper into a machine that reads the ph of the solution c. compare the ph paper's color with the color of ph paper from another solution d. compare the ph paper's color with a chart of colors and ph ranges