What is the valence electron of Lead "Pb"

What is the molar concentration of a phosphoric acid (h3po4) solution if 55.5 ml of the solution requires 35.5 ml of. 150 m naoh to completely react with the phosphoric acid?

how many carbon atoms are present in a mol of 12C?

The density of gold is 19.3 the density of iron pyrite is 5.0 if a nugget of iron pyrite and a nugget of gold each have a mass of 50g what can u conclude about the volume of each nugget

Why is water densest 40 degree Celsius

What Type of reaction is this equation C2H5S + O2 - --> CO2 + H2O + SO2

Nitrous oxide (n2o), or laughing gas, is commonly used as an anesthetic in dentistry and surgery. how many moles are present in 8.4 liters of nitrous oxide at stp?

How can an atom be electrically neutral when it contains particles that are charged?

Is boiling water considered physical or chemical bond

Which of the following is the correct scientific notation for 0.000451 g? 4.5 x 10-3 4.5 x 10-5 4.51 x 10-4 45.1 x 10-4

A phase change from a solid to a gas is called what