If I have 3.23 grams of SiO2, how many moles is that?

Which combination of formula and name is incorrect? a. na + = sodium ion b. ca2 + = calcium ion c. n2 ̅ = nitride ion d. f ̅ = fluoride ion e. o2 ̅ = oxide ion?

You need to prepare an acetate buffer of pH 5.50 from a 0.872 M acetic acid solution and a 2.41 M KOH solution. If you have 580 mL of the acetic acid solution, how many milliliters of the KOH solution do you need to add to make a buffer of pH 5.

List the electron shell and the number of electrons in each shell

39 is two fifths of what number

Carbon-13 is an isotope. It has 6 protons and 13 neutrons 7 neutrons 7 electrons 13 electrons

Sedimentation is least likely to occur

Why it is important to learn about elements, compound, and mixture?

Sodium borohydride is stable in acidic aqueous solutions. True or False

Assume at exactly 100.0°c and 1.00 atm total pressure, 1.00 mole of liquid water and 1.00 mole of water vapor occupy 18.80 ml and 30.62 l, respectively.

The time it takes to run a kilometer depends on the amount of exercise a person gets. What is the independent variable? -person running -time to run a kilometer -running -the amount of exercise