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3 years ago

Groups of cells that work together to perform a similar function was the evolution of what

1 answer:

5 0

Genomic evolution

Hope this helps :) you would probably want to do more research into Genomic evolution to give a more detailed answer, but that's the basic answer

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Water interacts with polar substances like –OH groups but not with non-polar substances like methyl (-CH3) or ethyl groups (-CH2

Otrada [13]

To answer this, we look at the polarities of these molecules given. A molecule is said to be polar when there is an unequal shraing of electrons the opposite is called nonpolar.
CH4 = nonpolar
CH3OH = polar
CH3 CH3 = nonpolar
CH3 CH2 CH2 OH = polar
CH3 CH2 CH2 CH2 CH2 CH3 = nonpolar

3 0

3 years ago

The compound ammonium sulfate consists of two ions, NH4+ and SO42–, both of which are

julsineya [31]

They are both (polyatomic) ions.

6 0

2 years ago

Which properties doom metalloids share with metals

CaHeK987 [17]

Metalloids are all solid at room temperature. Some metalloids, such as silicon and germanium, can act as electrical conductors under the right conditions, thus they are called semiconductors. Silicon, for example, appears lustrous but is not malleable or ductile (it is brittle - a characteristic of some nonmetals).

If this helped, please give me brainliest :)

3 0

3 years ago

Calculate the Lattice Energy of KCl(s) given the following data using the Born-Haber cycle: ΔHsublimation K = 79.2 kJ/mol IE1 K

DanielleElmas [232]

Answer:

Explanation:

The following equation relates to Born-Haber cycle

$\triangle H_f = S + \frac{1}{2} B + IE_M - EA_X+ U_L$

Where

$\triangle H_f$ is enthalpy of formation

S is enthalpy of sublimation

B is bond enthalpy

$IE_M$ is ionisation enthalpy of metal

$EA_X$ is electron affinity of non metal atom

$U_L$ is lattice energy

Substituting the given values we have

-435.7 = 79.2 + 1/2 x 242.8 + 418.7 - 348 +U_L

$U_L$ = - 707 KJ / mol

3 0

3 years ago

5. A gas at 127०C and 10.0 L expands to 20.0 L. What is the new temperature in Celcius? (HINT: You need to convert to Kelvins so

antoniya [11.8K]

Answer:

The new temperature is 527.15 ºC.

Explanation:

Charles’s law states that the volume of a fixed amount of gas maintained at constant pressure is directly proportional to the absolute temperature of the gas (the absolute temperature is the Kelvin temperature).

We need to calculate the temperature after the expansion, that is T₂. For that, we use Charles' law:

$V₁ ÷ T₁ = V₂ ÷ T₂$

Because we have to use the absolute temperature, we convert ºC to K adding 273.15:

T₁ = 127 ºC + 273.15 ºC = 400.15 K

$T₂ = V₂ × T₁ ÷ V₁$

$T₂ = 20. 0 L × 400.15 K ÷ 10.0 L$

T₂ = 800.3 K

We substract 273.15 to the result to convert it back to ºC:

T₂ = 800.3 - 273.15 = 527.15 ºC.

4 0

3 years ago