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seropon [69]
3 years ago
13

What is the main organ of the circulatory system?

Chemistry
2 answers:
Rainbow [258]3 years ago
7 0

Explanation:

your heart is the main organ of the circulatory system

steposvetlana [31]3 years ago
3 0
The heart are the main organ.
arteries, veins and capillaries are the one that travels blood around the body
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Thich of the following is a chemical property2
Dimas [21]

Answer:

"Freezing point  and ability to react with oxygen" are chemical properties

Explanation:

The change of liquid into solid is the freezing point. The melting point is more than the freezing point in certain cases of mixtures for certain organic compounds like fats. As soon as the mixture freezes it becomes solid and which results in change in the composition from the liquid and solid in this way the it drastically reduces the freezing point. The melting point gets higher due to the pressure. This happens due to the release of heat of which results in the rise of temperature to the freezing point .Also the reaction of elements with oxygen which leads to formation of new substance is also an chemical property

4 0
3 years ago
Global Precipitation Measurement (GPM) is a tool scientists use to forecast weather. Which statements describe GPM? Select three
Simora [160]

Answer:

It is a satellite that collects data about rain and snow.

• Its orbit covers 90 percent of Earth's surface.

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Explanation:

Correct on edge

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2 years ago
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How many milliliters of sodium metal, with a density of 0.97 g/mL, would be needed to produce 53.2 grams of hydrogen gas in the
olchik [2.2K]
The balanced chemical reaction is:

<span>2Na + 2H2O → 2NaOH + H2
</span><span>
We first use the amount of hydrogen gas to be produced and the molar mass of the hydrogen gas to determine the amount in moles to be produced. Then, we use the relation from the reaction to relate H2 to Na.

53.2 g H2 ( 1 mol / 2.02 g ) ( 2 mol Na / 1 mol H2 ) ( 22.99 g / 1 mol ) = 1210.96 g Na

1210.96 g Na ( 1 mL / 0.97 g ) = 1248.41 mL Na needed</span>
7 0
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A molecule of acetone and a molecule of propyl aldehyde are both made from 3 carbon atoms, 6 hydrogen atoms, and 1 oxygen atom.
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The structures of both acetone and propanal are shown below:

In the formula of propanal there is -CHO functional group at the end.

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Both have same molecular formula but different structural formulas.

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