What is always conserved in a chemical reaction?

A. Mass is always conserved in a reaction.

B. Energy is always conserved in a reaction.

C. Mass and energy are both conserved.

D. Nothing is always conserved in a reaction.

Prior to their phaseout in the 1980s, chemicals containing lead were commonly added to gasoline as anti‑knocking agents. A 6.897g sample of one such additive containing only lead, carbon, and hydrogen was burned in an oxygen‑rich environment.

Ions that are made of more than one atom are examples of a. polyatomic ions. b. negative ions. c. positive ions. d. neutral ions.

What is the percent by volume concentration of 58.0 mL of water in 920 mL of an acetic acid-water solution?

Which answer choice correctly describes a chemical bond? a force that holds atoms together in a fixed yet flexible structure a force that holds atoms together in a fixed and stationary structure a force that holds atoms together in a fixed and rigid

Complete the following statement by checking all that apply Creativity allows scientists to develop multiple approaches to solving problems. adapt to changes in scientific knowledge. look at old problems in new ways.

If a plane is traveling300 mph how long will it take to travel 1800 miles

What substance is a diatomic molicule

What does the atomic mass of an element represent

Which type of reaction is the Haber process: N2 (g) + 3 H2 (g) → 2 NH3 (g) + heat? * exothermic, with an increase in entropy exothermic, with a decrease in entropy endothermic, with an increase in entropy endothermic, with a decrease in entropy

What is the hydroxide ion concentration of a solution that has a pH of 9.630?