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3 years ago

How do autotrophs and heterotrophs relate to the carbon cycle?

Chemistry

1 answer:

blagie [28]3 years ago

5 0

Answer:

Autotrophs store chemical energy in carbohydrate food molecules they build themselves. Most autotrophs make their food through photosynthesis using the energy of the sun. Heterotrophs cannot make their own food, so they must eat or absorb it.

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By which mechanism would a steroid molecule diffuse into the cell?

LUCKY_DIMON [66]

Answer: Directly through the phospholipid membrane

Explanation:

The cell membrane consist of a phospholipid bilayers structure. In the interior of the membrane, the phospholipid tail are hydrophobic, which makes the cell membrane to be selectively permeable, it is permeable to non polar molecules and impermeable to polar molecules.

Because Steroids are fat soluble, non polar compounds, they can diffuse directly through the hydrophobic, non polar core of the phospholipid bilayer without the use of carrier proteins.

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3 years ago

Describe one way the respiratory and nervous system work together

DiKsa [7]

<h2>♨ANSWER♥</h2>

The respiratory system supplies oxygen to the blood and removes carbon dioxide. The brain monitors respiratory volume and blood gas levels. The brain regulates respiratory rate.

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2 years ago

Is soidum bicarbonate and silver nitrate reacting a chemical or physical change?

Tanzania [10]

sodium bicarbonate and silver nitrate reacting is a chemical change

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4 years ago

How many moles of h2 can be formed if a 3.25g sample of Mg reacts with excess HCl

kogti [31]

Answer:

0.134 moles of H₂ can be formed if a 3.25g sample of Mg reacts with excess HCl

Explanation:

The balanced reaction is:

Mg + 2 HCl → MgCl₂ + H₂

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles react:

Mg: 1 mole
HCl: 2 moles
MgCl₂: 1 mole
H₂: 1 mole

Being:

Mg: 24. 31 g/mole
H: 1 g/mole
Cl: 35.45 g/mole

the molar mass of the compounds participating in the reaction is:

Mg: 24.31 g/mole
HCl: 1 g/mole + 35.45 g/mole= 36.45 g/mole
MgCl₂: 24.31 g/mole + 2*35.45 g/mole= 95.21 g/mole
H₂: 2*1 g/mole= 2 g/mole

Then, by stoichiometry of the reaction, the following quantities of mass participate in the reaction:

Mg: 1 mole* 24.31 g/mole= 24.31 g
HCl: 2 moles* 36.45 g/mole= 72.9 g
MgCl₂: 1 mole* 95.21 g/mole= 95.21 g
H₂: 1 mole* 2 g/mole= 2 g

Then you can apply the following rule of three: if by stoichiometry 24.31 grams of Mg form 1 mole of H₂, 3.25 grams of Mg how many moles of H₂ will they form?

$moles of H_{2} =\frac{3.25 grams of Mg*1 mole of H_{2} }{24.31 grams of Mg}$

moles of H₂= 0.134

0.134 moles of H₂ can be formed if a 3.25g sample of Mg reacts with excess HCl

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4 years ago

The largest mass extinction event in the history of the Earth occurred at the end of the _______ period.

ahrayia [7]

The world's largest mass extinction was the Permian-Triassic event about 250 million years ago, which wiped out 95% of earth's species. It marked the end of the Paleozoic era …and the beginning of the Mesozoic.

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3 years ago

Read 2 more answers