match the number of neutrons to the correct isotope by studying the atomic number and mass number of each isotooe

The magnesium and calcium ions present in seawater ([Mg2+] = 0.059 M and [Ca2+] = 0.011 M) can be separated by selective precipitation with KOH. What is the concentration of [Mg2+] when Ca (OH) 2 starts to precipitate? Ksp Mg (OH) 2 = 2.

Fluorite, a mineral of calcium, is a compound of the metal with fluorine. Analysis shows that a 2.76g sample of Fluorite contains 1.42g calcium. Calculate the mass fraction of calcium and fluorine in Fluorite.

What is the ph of 0.11 m diethylamine, (ch3ch2) 2nh, (kb = 8.6 * 10-4) ?

Which statement best explains why heating a liquid affects its viscosity?

If 200 ml of 0.15 M propionic acid (PA) is added to 300 ml of 0.02 M NaOH, what is the resulting pH of the solution? Round the answer to one decimal place. pKa = 4.87

Which has the highest viscosity? milk maple syrup orange juice water?

Sodium (Na) A Homogeneous Mixture B Element C Compound D Heterogeneous Mixture

What structures are formed when water molecules surround ions

Which state of matter is the most compressible?

My chemistry is so hard