Biology, 16.10.2020 04:01 jovonjones1234
PLEASE HELP!! :(( In the equation below, 25 grams of sodium (Na) reacted with 10 grams of water (H20).
If 3 grams of hydrogen gas (H2) is produced by this reaction, what is the mass of sodium hydroxide (NaOH) produced?
A. 3 grams
B. 32 grams
C. 10 grams
D. 25 grams
Answers: 3
Biology, 22.06.2019 08:30, cjjohnson1221
How does the carbon cycle involve an exchange of carbon
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Biology, 22.06.2019 14:00, michellemonroe012305
True or false: (a) the strings of little red dots represent carbohydrates. (b) the model is called a bilayer because there are two main types of molecules present, lipids and proteins. (c) the many black lines represent amino acid tails. (d) this model shows membrane transport. (e) the blue ovals are hydrophobic. (f) the blue ovals represent phospholipid heads.
Answers: 1
Biology, 22.06.2019 20:30, tyhe
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
PLEASE HELP!! :(( In the equation below, 25 grams of sodium (Na) reacted with 10 grams of water (H20...
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