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alexira [117]
3 years ago
8

A gradual change over time in a species that enables the species to better survive in its environment is known as a(n)

Chemistry
2 answers:
aliina [53]3 years ago
6 0
The answer is A, adaptation
sattari [20]3 years ago
4 0

Answer:

Adaption

Explanation: the definition of adpation is to learn how to survive or to learn what to do to be better or wtvr

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Name the functional group in the
8_murik_8 [283]
It’s called Diethyl ether so I think the answer is D
8 0
2 years ago
Acetic acid has a Kb of 2.93 °C/m and a normal boiling point of 118.1 °C. What would be the boiling point of a solution made by
alexdok [17]

Boiling point elevation is given as:

ΔTb=iKbm

Where,

ΔTb=elevation in the boiling point

that is given by expression:

ΔTb=Tb (solution) - Tb (pure solvent)

Here Tb (pure solvent)=118.1 °C

i for CaCO3= 2

Kb=2.93 °C/m

m=Molality of CaCO₃:

Molality of CaCO₃=Number of moles of CaCO₃/ Mass of solvent (Kg)

=(Given Mass of CaCO3/Molar mass of CaCO₃)/ Mass of solvent (Kg)

=(100.0÷100 g/mol)/0.4

= 2.5 m

So now putting value of m, i and Kb in the boiling point elevation equation we get:

ΔTb=iKbm

=2×2.93×2.5

=14.65 °C

boiling point of a solution can be calculated:

ΔTb=Tb (solution) - Tb (pure solvent)

14.65=Tb (solution)-118.1

Tb (solution)=118.1+14.65

=132.75

3 0
3 years ago
A fixed mass of oxygen gas occupies 300cm cube at 0 degree centigrade. what volume would the gas occupy at 15 degree centigrade​
egoroff_w [7]

Answer:

Volume occupied by oxygen gas at 15 degree centigrade​ is equal to 316.5 centimeter cube

Explanation:

Assuming Pressure is constant.

\frac{V_1}{T_1} = \frac{V_2}{T_2}

where T1 and T2 are temperature in Kelvin

Substituting the give values we get-

\frac{300}{273} = \frac{V_2}{288}

V_2 = \frac{288*300}{273} \\V_2 = 316.5

Volume occupied by oxygen gas at 15 degree centigrade​ is equal to 316.5 centimeter cube

5 0
2 years ago
Is salt a pure substancetance
Slav-nsk [51]
Yes it is a pure substance
7 0
3 years ago
Read 2 more answers
An element is made up from ?
sertanlavr [38]

Answer:

Atoms

Explanation:

Elements are the chemical combinations of two or more atoms of the same kind

4 0
3 years ago
Read 2 more answers
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