What is the pH of a 0.0075 molar solution of ammonia (NH3)?
Given: pKb = 4.75
A.
9.89
B.
3.44
C.
10.56
D.
12.25

How are isotopes of the same chemical element alike? how are they different?

Afraction can be converted to a decimal by dividing the denominator into the numerator. use a calculator. divide to convert the fractions from part a to decimals. then describe the pattern you see in the decimal.

How can a scientist assess whether a pure niobium (nb) sample is responsible for contaminating the lab with radioactivity? test the niobium sample to see whether it now contains other elements.test the niobium sample for the presence of niobium oxide compounds.heat the niobium, and see if the level of radioactivity in the lab increases.place the niobium under pressure, and see if the level of radioactivity in the lab increases.