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ivanzaharov [21]
3 years ago
15

What part of a cell regulates the movement of materials in and out of the cell

Chemistry
2 answers:
goblinko [34]3 years ago
4 0
I. plasma membrane - It surrounds the cell and has three major functions: ... It regulates the movement of substances into and out of the cell. It is referred to as being selectively permeable because it allows or prevents certain substances to enter and leave the cell.
storchak [24]3 years ago
3 0
The cell membrane controls what goes in and out of the cell. It is contained in An ANIMAL, PLANT and BACTERIA cell. For more information go to the following website: https://www.bbc.com/bitesize/guides/zpqpqhv/revision/8
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In which kind of climate would frost wedging most liekly occur?
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3 years ago
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How many atoms of mercury are present in 3.2 cubic centimeters of liquid mercury? the density of mercury is 13.55 g/cc. answer i
jenyasd209 [6]

Answer:

             1.3 × 10²³ Atoms of Mercury  

Solution:

Step 1: Calculate Mass of Mercury using following formula,

                               Density  =  Mass ÷ Volume

Solving for Mass,

                               Mass  =  Density × Volume

Putting values,

                               Mass  =  13.55 g.cm⁻³ × 3.2 cm³                ∴ 1 cm³ = 1 cc

                               Mass  =  43.36 g

Step 2: Calculating number of Moles using following formula;

                               Moles  =  Mass ÷ M.mass

Putting values,

                               Moles  =  43.36 g ÷ 200.59 g.mol⁻¹

                               Moles  =  0.216 mol

Step 3: Calculating Number of Atoms using following formula;

                               Number of atoms  =  Moles × 6.022 ×10²³

Putting value of moles,

                               Number of Atoms  =  0.216 mol × 6.022 × 10²³

                              Number of Atoms  =  1.3 × 10²³ Atoms of Hg

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Answer:

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Explanation:

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Explain the iodine clock reaction.
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