A scientist observes that an unknown solution turns blue Litmus paper red and reacts with zinc to produce hydrogen gas. Which of the following best describes the unknown solution. A. a colloid

B. an acid

C. a base

D. a suspension

Kevlar is a synthetic polymer that was marketed for the first time in 1971. It is difficult to cut and does not shrink when exposed to cold temperature. It will not rust or corrode, and it can be immersed in water without being affected.

A Chemist measured 184 mL using a graduated cylinder. Based on her experience, the volume did not seem to be correct.

An electrolyte is a substance that will conduct electricity when dissolved in water. a substance that conducts electricity well is a strong electrolyte. a substance that conducts electricity poorly is a weak electrolyte.

Consider the following reaction in a closed system: H2 (g) + I2 (g) → 2HI (g). Which of the following will decrease the rate of the forward reaction? A.) add some H2 B.) remove some HI C.) increase the volume D.) increase the temperature

What was the reasoning scheme behind the following sentence: All prokaryotes lack a well-defined nucleus. The newly discovered cell has no well-defined nucleus. Therefore, the newly discovered cell is a prokaryote.

Which of the following is the final concentration of KCl if 500 ml of 0.25 M KCl is diluted to a final volume of 5 L? 0.025 L 0.0025 L 25 L 2.5 L

What do you use to measure mass

A salt shaker filled with 17.0g sodium chloride contain how many moles?

When a radioactive decay occurs what is released? A. Only protons and neutrons B. Only electrons C. Protons/Neutrons, beta particle, gamma ray D. Only gamma rays

How is the process of scientific inquiry and the design process similar and how they are different.