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Chemistry

2 answers:

dedylja [7]2 years ago

5 0

The theory of evolution

Mandarinka [93]2 years ago

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The theory of evolution

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4. Calculate the molar mass of 9.37 x 10-3 mol magnesium (Mg).

Yuri [45]

To calculate moles from grams using chemical formulas ... However, one mole of magnesium weighs 24.31 g. ... 0.873 g x 95.21 g = 9.17 x 10-3 mol MgCl2.

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3 years ago

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

PLZ HELP THIS IS DUE TODAY!!!!!!

Goshia [24]

It would be letter C, because the molecules of solids can have a little vibration in their places.
The first one is for gas, so it's wrong. The second one is for liquids. And finally, the third one is right.

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3 years ago

Give four method of acid preparation and give two reactions to support your answers

gregori [183]

(i) Hydrogen chloride gas is prepared by treating Sodium chloride with concentrated sulphuric acid. The HCl gas is passed through a drying agent to remove moisture where concentrated sulphuric acid plays the role of dehydrating agent as well.

(ii) NaCl+H2 SO4 →NaHSO 4 +HCl(g)

Hope it helps :)

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3 years ago

Read 2 more answers

Molecules that are optically active due to the tetrahedral arrangement of bonds around the carbon atom are often referred to as

morpeh [17]

<span>Answer:
Molecules that are optically active due to the tetrahedral arrangement of bonds around the carbon atom are often referred to as <u>Chiral Molecules</u>.

Explanation:
Chiral molecules have stereogenic centers. When plane polarized light is fall on these compounds they rotate the light either in clockwise or anti clockwise direction. The mirror images of chiral moleculecules are non-superimposable. Below few examples for molecules containing chiral centers are given.</span>

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3 years ago