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mixer [17]
3 years ago
14

3. Trees, bananas, skateboards and pancakes are all solids. They have

Chemistry
2 answers:
Pavel [41]3 years ago
6 0
B watermelon is a solid cutie :)
Naily [24]3 years ago
4 0

Answer:

B. Watermelon

Explanation:

Watermelon is the only option with a definite shape that wouldn't change if you put it in a bowl

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How many carbon atoms are in 15.0 grams of sucrose (C12H22O11)
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What is the treatment and disposal of Mercury<br>​
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4 0
2 years ago
Uranium-238 decays to lead-206 with a half-life of 4.5 x 109 yr. Determine how much uranium-238 decays in milligrams (to three s
Mamont248 [21]

Answer:

2.15 mg of uranium-238 decays

Explanation:

For decay of radioactive nuclide-

                        N=N_{0}.(\frac{1}{2})^{\frac{t}{t_{\frac{1}{2}}}}

where N is amount of radioactive nuclide after t time, N_{0} is initial amount of radioactive nuclide and t_{\frac{1}{2}} is half life of radioactive nuclide

Here N_{0}=4.60 mg, t=4.1\times 10^{9}yr and t_{\frac{1}{2}}=4.5\times 10^{9}yr

So,N=(4.60mg)\times (\frac{1}{2})^{\frac{4.1\times 10^{9}}{4.5\times 10^{9}}}

so, N = 2.446 mg

mass of uranium-238 decays = (4.60-2.446) mg = 2.15 mg

3 0
3 years ago
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