The activation energy of an endothermic reaction must be greater than the required ΔH.

True

False

Why is aluminum such an important component of alloys?

Which of the following is NOT true about performing biological investigations? A. Scientists are trained to conduct their investigations safely. B. Reading and understanding the steps before conducting an experiment is necessary for safety. C.

Wet cell batteries are typically used to supply electrical energy to

Water is initially present in a state where it's molecules are far apart. During a change of state it's molecules slow down which chance of state most likely taken place (A) gas to liquid (B) liquid to gas (C) solid to liquid (D) gas to plasma

What does carbonic acid decompose into

Under the Implied Consent law, which of the following is true? A. Your driving privileges will be suspended if you refuse a chemical test to measure your alcohol level. B.

If 0.366 g of hydrogen is obtained in this experiment, how many grams of sulfur must be obtained

A substance that does not conduct electricity as a solid but does conduct electricity when melted is most likely classified as (1) an ionic compound (2) a molecular compound (3) a metal (4) a nonmetal

A conical, flat-bottomed flask with a narrow neck that can be used for heating, mixing, watching reactions, and swirling, not for measuring

Answer 1. the law of conservation of mass states that mass is neither created nor destroyed in an ordinary chemical reaction. when an iron nail rusts, it seems to get heavier in mass. does the iron nail follow the law of conservation of mass?