Los elementos artificiales son extraido de la naturaleza en su mayoria?

When a chemical recstion has oxygen what does it clasify as

What percentage of the moon is always lit during a lunar eclipse

What mass of iron is required to replace over from 8.00 g of silver nitrate dissolved in water

How much heat is required to heat 9.61g of ethanol (CH3CH2OH) from 24.10C to 67.30C?

A golf ball weighs 4 oz. How many golf balls would there be in 2.5-ton sample of golf balls, assuming each golf ball had the same weight

Name 3 characteristics that can be used to identify minerals

Hemoglobin, the oxygen-carrying protein in red blood cells, has four iron atoms per molecules ad contains 0.340 percent iron by mass. calculate the molar mass of hemoglobin

Nancy wants to find out how the steepness of a hill's slope affects the amount of soil that erodes from it. She has soil, a long pan, and a pile of books with which to build a model hillside. She has a watering can to model rainfall.

Elements on the periodic table are arranged by increasing?

What is the difference between molecular formula and molecular model