Biology, 22.02.2021 23:00 strikeboystorm
a radioactive element has a half-life of 3,000 years. if a sample of this element begins with a mass of 60 grams, how long would you have to wait for the mass to decrease to 15 grams
Answers: 2
Biology, 22.06.2019 07:50
What is a limitation of using a chemical formula, such as c6h1206, to represent a compound? the chemical formula does not show the types of elements that make up the compound. the chemical formula does not show how the atoms are connected to one another the chemical formula does not show the number of atoms of each element in a molecule. the chemical formula does not show the chemical symbols of the elements in the compound
Answers: 1
Biology, 22.06.2019 15:00
Why should organisms reproduce more offspring than will survive? select all that apply.
Answers: 2
Biology, 22.06.2019 16:30
Which of the following may one conclude from a map that shows the average ph value of rainfall in the u.s.? acid rain is a more serious problem on the east coast. acid rain falls equivalently across the continental u.s. there are more factories on the west coast. the midwest has fewer forests than the rest of the u.s.
Answers: 1
Biology, 22.06.2019 19:30
The variation among individuals, on which natural selection acts
Answers: 1
a radioactive element has a half-life of 3,000 years. if a sample of this element begins with a mass...
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