3 years ago

What does optimal foraging mean?

Chemistry

1 answer:

vovikov84 [41]3 years ago

6 0

Answer:

obtain (food or provisions)

Explanation:

example: a girl foraging grass for oxen

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Zinc and sulfuric acid solution produce zinc sulfate solution and hydrogen balanced chemical equation

IRISSAK [1]

Answer:

Zn + H2SO4 → ZnSO4 + H. 2

Explanation:

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3 years ago

A separatory funnel contains the two immiscible liquids water and toluene. Use the given densities to determine which layer is o

damaskus [11]

Answer:

Top layer Toluene

Bottom layer Water

Explanation:

When two non-miscible liquids are put together, the one with the higher density will be on the bottom, while the one with the lower density will be on top.

Meaning that in this problem's case toluene would be on the top layer and water in the bottom layer.

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2 years ago

the half life for strontium-90 is 29 years. how many half-lives did the sample go through at the end of 87 year

Nesterboy [21]

90 divided by 29 x 87 = 290

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2 years ago

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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