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lesya [120]
3 years ago
10

In a cell, what is the function of the Cell Membrane?

Chemistry
1 answer:
joja [24]3 years ago
8 0

The answer is C :

It controls the entry and exit of substances.

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A piece of stainless steel weighing 1.55 g absorbs 141 J of heat energy when its temperature increases by 178oC. What is the spe
V125BC [204]

Answer:

= 0.551J/(g°C)

Explanation:

Specific heat is the amount of heat to required to raise the temperature of 1 gram substance to 1° C

The formula

C = q / m × ΔT ______ (1)

where ,

C = specific heat

q = heat

m = mass

ΔT = change in temperature

mass of the stainless steel is m = 1.55g

heat of the stainless steel is q = 141 J

the change in temperature is ΔT = 178°C

substitute all the value in the equation (1)

C = \frac{141}{1.55 \times 178 } \\\\= 0.511J /(g^\circ C)

7 0
3 years ago
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Which set of coefficients will balance this chemical equation? __PbS(s) + __O2(g) → 2PbO(s) + 2SO2(g)
Elina [12.6K]

A two in both of the blanks will balence the equation. It will look like so:


2PbS(s) + 2O2(g) --> 2PbO(s) +2SO2(g)


6 0
3 years ago
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How many different isomers can be derived from ethylene if two hydrogen atoms are replaced by a fl uorine atom and a chlorine at
svp [43]
Answer:
             THREE<span> different isomers can be derived from ethylene if two hydrogen atoms are replaced by a fl uorine atom and a chlorine atom.

Explanation:
                   When two Hydrogen atoms in ethylene (C</span>₂H₄) are replaced with Fluorine and Chlorine atom then the new molecular formula is C₂H₂FCl.
                    Compounds having same Molecular formula but different structural formula are called as Isomers.
                     First Isomer of C₂H₂FCl is 1-chloro-1-fluoroethene, in which F and Cl at geminal position (attached to same Carbon atom).
                     Other two Isomers are Geometrical Isomers of 1-chloro-2-fluoroethene, in which F and Cl at different carbon atom and having different position is space. The one in which both F and Cl at opposite side forms (<em>trans</em>)-1-chloro-2-fluoroethene and the one in which both are in same side is called as (<em>cis</em>)-1-chloro-2-fluoroethene.

8 0
3 years ago
The process by which water is moved and changed through the earth is called
Dima020 [189]

Answer:

evaporation

Studies have revealed that evaporation—the process by which water changes from a liquid to a gas—from oceans, seas, and other bodies of water

Explanation:

8 0
3 years ago
Which is colder dry ice or dioxide gas
Juli2301 [7.4K]
Dioxide gas because ita cooler
6 0
3 years ago
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