The average salinity of the oceans is about 3.5% (or 35 parts-per-thousand)
Indicate whether the statement is true or false
true
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To what does Hadean apply? Is it an "official" part of the time scale?
What will be an ideal response?
What law was passed to cope with the problem of abandoned hazardous-waste sites? What are the main features of the legislation?
What will be an ideal response?
Which country of Southeast Asia lies both on the mainland and in the islands of the region?
A) Laos B) Malaysia C) Singapore D) Vietnam E) Brunei
An element has two different isotopes: one that weighs 65 amu and another that weighs 67 amu. If the average atomic mass of all the isotopes is 66.5 amu, what can be said about the relative abundance of the isotopes?
A. All the isotopes have the same relative abundance. B. The isotope with the mass of 66.5 is more abundant than the isotope with the mass of 67. C. The isotope with the mass of 66.5 is more abundant than the isotope with the mass of 65. D. The isotope with the mass of 67 is more abundant than the isotope with the mass of 65. E. The isotope with the mass of 65 is more abundant than the isotope with the mass of 67.