Biology, 04.01.2021 04:30 elijahronda
In the reaction shown below, how many moles of
hydrogen are produced when 10 moles of potassium
react with water?
2 K + 2 H2O -> 2 KOH + H2
• 2.5 moles
• 5 moles
• 10 moles
• 20 moles
Answers: 1
Biology, 21.06.2019 20:10
4. how does a phospholipid behave in water? the phosphate head does not mix with water; the fatty acid tails do. the phosphate head and the fatty acid tails mix with water. the phosphate head and the fatty acid tails do not mix with water. the phosphate head mixes with water; the fatty acid tails do not.
Answers: 1
Biology, 22.06.2019 20:30
Our planet has experienced five major extinctions in the four billion year history of life. the first, 450 million years ago, occurred shortly after the evolution of the first land-based plants and 100 million years after the cambrian explosion. the second extinction occurred 350 million years ago, causing the formation of coal forests. next earth experienced two mass extinctions during the triassic period, between 250 and 200 million years ago. the fifth mass extinction occurred 65 million years ago, ending the reptilian dominance of the earth. according to richard leakey, the sixth mass extinction is happening right now. leakey suggests that we, the human race, are the cause. each year, at our hand, approximately 50,000 species vanish from earth. he believes that man is destroying earth at a rate comparable with the impact of a giant asteroid. leakey's statistics indicate that 50% of earth's species will become extinct within the next 100 years assuming leakey's hypothesis of a sixth mass extinction to be true, how will we expect the model to change? a) a sharp spike in the graph approximately 100 million years from now b) a dip in the graph, followed by a sharp spike about 100 million years from now c) a sharp spike in the graph immediately following the "0" location of the x axis d) a plateau following the "0" mark on the x axis, followed by a gradual rise to a new peak
Answers: 3
Biology, 22.06.2019 22:00
Which statement is true for all sexually reproducing plants and animals? the process of mitosis produces gametes.the process of mitosis always produces diploid cells.the process of meiosis produces gametes.the process of meiosis produces haploid cells.the process of meiosis produces diploid cells.
Answers: 2
In the reaction shown below, how many moles of
hydrogen are produced when 10 moles of potassium
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