Answers: 2
Chemistry, 22.06.2019 07:00
Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils
Answers: 1
Chemistry, 22.06.2019 11:40
Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)
Answers: 1
Chemistry, 22.06.2019 17:30
Consider the story you just read. all but one of the choices below indicate that something is living.
Answers: 1
Chemistry, 22.06.2019 18:00
Which three statements represent the benefits of performing experiments using computer simulations?
Answers: 2
give 3 examples nasa spinoffs...
Mathematics, 04.09.2020 04:01
Arts, 04.09.2020 04:01
Mathematics, 04.09.2020 04:01
Physics, 04.09.2020 04:01
Biology, 04.09.2020 04:01
Medicine, 04.09.2020 04:01
Mathematics, 04.09.2020 04:01
Mathematics, 04.09.2020 04:01
Biology, 04.09.2020 04:01
Chemistry, 04.09.2020 04:01
Mathematics, 04.09.2020 04:01