Calcium fluoride is 48.7% fluorine by mass. How many grams of calcium fluoride would contain 6.34 grams of fluorine?

A weak acid is a dilute acid that is not very powerful a. True b. False

Early Britons mined tin and fashioned weapons and tools out of bronze. a. True b. False

Which of these changes would notcause an increase in the pressure of a contained gas? The temperature is increased. More of the gas is added to the container. The average kinetic energy of the gas is increased.

An atom can be compared to our solar system because: The nucleus gives off light like the sun. Both electrons and planets move quickly. Electrons orbit the nucleus like planets orbit the sun. All of the above.

Toxaphene is a pesticide that was applied to cotton crops. If 1.5 kg of toxaphene is applied to 1000 m3 of soil and the soil density is 1700 kg/m3, Determine the toxaphene concentration in the soil in units of ppm.

If a new substance is formed in a chemical reaction, what atoms do they consist of?

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