Density = mass / volume so mass = density x volume. Therefore mass = 2.70 x 348 = 939.6g
Answer:
D. to predict the effects of human population on the supply of natural resources
Explanation:
From the available graph, it can be seen that Natural resources and human population are directly proportional to each other. As the human population increases, the natural resources decreases, until they both finally meet up.
Hence, in this case, the correct answer is that the role of science in this study is "to predict the effects of human population on the supply of natural resources."
Answer:
Passivation of Oxide layers of the metals.
Explanation:
Passivation is a non-electrolytic finishing process that makes most metals rust-resistant. The prosses removes free iron from the surface by using either nitric or citric acid. When this happens, it results to an inert, protective oxide layer that is very slow or less likely to chemically react with air and cause corrosion.
Passivity caused many of the metals several minutes to begin to react. Once the finishing process that makes metals less likely to react was eroded, reaction was initiated vigorously.
