A group of students added similar pieces of magnesium metal to two different acidic solutions, hydrochloric acid and ethanoic acid. They found that the reactions appeared similar and they produced the same amount of gas in the same time interval. Explain how the reactivity of these different acids could be the same

Which statement describes evidence of a chemical reaction? a) ice melting eliminate b) water boiling c) lighting a match d) grape juice freezing

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?