What is the transition metal with 30 electrons

I'm named after a very famous scientist. who am I? (Periodic table)

If the outside of your flask is not dry when the first mass determination is made and it is dried for the second mass determination, what effect will this have on your results?

When you put an ice cube into a glass of room temperature water, why does the water get cold?

Describe one possible economic impact of redox reactions. How might that impact be diminished?

A bottle contains 475 ml of insulin at a concentration of 20.0 mg/ml. what is the total mass of insulin in the bottle?

A scientist observed a 5-mL sample of an unknown substance. It is a blue liquid with a density of 1.2 g/cm. the substance reacts with carbon dioxide.

9.87 g of calcium sulfate and 12.05 g of potassium react. What is the total amount of potassium sulfate that can be produced?

What volume of water vapor measured at STP is produced by the combustion of 4.00 g of natural gas (CH4) ? (you must write and balance the equation first)

How many moles of 0.225 m ca oh 2 are present in 0.350 l of solution

A solute and a solvent are mixed together. What requirement would enable you to predict the the substances would form a homogeneous solution?