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3 years ago

Help me on this thing

Chemistry

1 answer:

suter [353]3 years ago

5 0

1 linear

2 tetrahedral

3 trigonal pyramidal

4 bent

good luck

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Should the students dump the substance in the test tube in the sink after finishing the experiment? Explain.

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It depends on weather or not the chemicals used can cause problems if not and it's a safe substance than yes they should pour it down the drain

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3 years ago

a polluted lake is 0.300 μg (micrograms) per liter of water, what is the total mass of mercury in the lake, in kilograms, if the

Aloiza [94]

Answer:

95.9 kg

Explanation:

First we convert 15.0 mi² to m²:

15.0 mi² * ( $\frac{1609.34 m}{1mi}$ )² = 3.88x10⁷ m²

Then we convert 27.0 ft to m:

27.0 ft * $\frac{0.3048m}{1ft}$ = 8.23 m

Now we calculate the total volume of the lake:

3.88x10⁷ m² * 8.23 m = 3.20x10⁸ m³

Converting 3.20x10⁸ m³ to L:

3.20x10⁸ m³ * $\frac{1000L}{1m^3}$ = 3.20x10¹¹ L

Now we calculate the total mass of mercury in the lake, using the given concentration:

0.300 μg / L * 3.20x10¹¹ L = 9.59x10¹⁰ μg

Finally we convert μg to kg:

9.59x10¹⁰ μg * $\frac{1kg}{1x10^9ug}$ = 95.9 kg

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3 years ago

Name the element that has atoms with the same electronic structure as sulfur ion

umka21 [38]

Are you referring to which element that has the same reactive properties? If so it would be any element in the Chalcogen group.

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3 years ago

Which substances play an important role in communication between cells in a multicellular organism by acting as chemical messeng

Semenov [28]

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Hormones

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Hormones are chemical messengers released in one part of the body as chemical messengers into the bloodstream to achieve target results in another part of the body. The endocrine system is responsible for regulation of the internal environment (homeostasis).

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4 years ago

Hecking skills activated

artcher [175]

Answer:

yes 34

Explanation:

4/13 =0.307

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3 years ago

Read 2 more answers