Which metal is the most abundant in the Earth's crust? copper (Cu) aluminum (Al) iron (Fe) zinc (Zn)

What has to happen before a star is able to do a chemical reaction?

Gerald's science teacher mixed room temperature samples of hydrochloric acid and sodium hydroxide in a large beaker.

What should be done if particles of precipitate appear in the filtrate?

How many kilojoules of heat are absorbed when 2.00 L of water is heated from 19*C to 80*C? (Show all work including the equation you use to solve)

Why do submarines have to be built with such strong, thick walls, compared to ships? Explain in as much detail as you can using ideas about water pressure.

What is a scientific explanation for a range of hypotheses and observations supported by testing

A chemical reaction involves the rearrangement of atoms to form new molecules. During a chemical reaction, however, atoms are neither created nor destroyed. Which of the following is true about the atoms involved in a chemical reaction? A.

What is the new concentration, after diluting 300 mL of a 1.5 M LiCl solution to 1L

The answer that he gave was wrong

In which orbital does an electron in a bromine atom experience the smallest?