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2 years ago

The human activities in two locations are described below:

Chemistry

1 answer:

Lisa [10]2 years ago

6 0

D. The population of fish in Location B will decrease because the water is contaminated

Explanation:

The correct statement from the given choices is that the population of fish in location B will decrease because the water is contaminated.

The use of pesticides and fertilizers will eventually run-off into nearby streams and contaminate them.

This will lead to water toxicity beyond levels that organism in the stream can bare.

Plastic is non-biodegradable and does not pollute the air.
Plastic has nothing to do with water absorption from the air.
The population of honeybees will reduce because of the applied pesticides.

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Elements in a group have the same number of valence electrons and the same ____

frozen [14]

The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons. They are the electrons involved in chemical bonds with other elements. Every element in the first column (group one) has one electron in its outer shell.

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3 years ago

If a red blood cell is 100% saturated, how many molecules of O2 are bound to it?1 billion molecules of O24 molecules of O2250 mi

kondor19780726 [428]

Answer:

1 billion molecules O₂

Explanation:

From my research, a human red blood cell contains approximately 270 million hemoglobin molecules.

A hemoglobin molecule contains four heme groups, each of which has an iron ion forming a coordination complex that carries every dioxygen molecule. Therefore for each hemoglobin molecule, we will have 4 dioxygen molecules. The heme groups are responsible for the transport of every dioxygen and other diatomic gases.

Hence, the number of O₂ molecules in a red blood cell saturated with 100% will be:

$\frac{270 \cdot10^{6} hemoglobine molecules}{1 red blood cell} \cdot \frac{4 heme group}{1 hemoglobine molecule} \cdot \frac{1 O_{2} molecules}{1 heme group} = 1 \cdot 10^{9} O_{2} \frac{molecules}{red blood cell}$

So, the correct answer is 1 billion of O₂ molecules.

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3 years ago

Why is there a hole in the ozone layer? What do you think the consequences of that hole are?

Pavel [41]

Answer:

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3 years ago

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3 years ago

the volume of a gas with a pressure of 1.2 atmospheres increases from 1 to 4 what is the final pressure of the gas assuming cons

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Answer:

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