How many moles are in 442.8 g of strontium carbonate (SrCO3) ?

A) 1.000

B) 65 360

C) 1.500

D) 3.000

Calculate the pOH of a 9.03x10-5 M solution of NaOH.

What is the oxidation state Ca (NO3) 2

The percentage of water in an unknown hydrated salt is to bedetermined by weighing a sample of the salt, heating it to driveoff water, cooling it to room temperature, and re-weighing.

How much heat is absorbed to change 36.0 grams of water from a solid to a liquid at 0 degrees Celsius (ΔHfusion = 6.02 kJ/mol) ?

What is density a measure of.

Hydrogen has three isotopes with mass numbers of 1, 2, and 3 and has an average atomic mass of 1.00794 amu. This information indicates that 1. equal numbers of each isotope are present 2. more isotopes have an atomic mass of 2 or 3 than of 1 3.

Describe the process of how visible light is produced

Which of the following contains both ionic and covalent bonding? CH4 NaCl NH4Cl N2O4 If the formula for a compound is represented by X2Y3 and the charge on the Y ion is - 2, what is the charge in the X ion? +1 +2 +3 +4

Qual e o maior orgao do corpo humano

Whic of the following fromulas represents a nonpolar molecule? a) N2 b) H2O c) NaCI d) HCI