Which of the following is a physical change?

O Ice melts at 0°C.

Carbon combines with oxygen to form carbon dioxide.

A red substance is decomposed by heat to form

mercury and

oxygen.

Water is decomposed by electricity into hydrogen and oxygen.

The basic atom has a neutral charge. True or False

What organelle stores water, food, or waste

You find a ring with a mass of 107g. You fill a graduated cylinder up with 10ml of water and put the ring into the cylinder. The water rises up to the 15ml mark. How much water was displaced?

The site for all chemical reactions that take place in the cell is the

5. How many moles are in 19 grams of KNO,?

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?