Answer 1:
This is an example of successful adaptive mutation. Adaptive mutations actually happen because of high levels of stress in the organism's environment caused by the same stressor/s. Here, lots of rabbits being excessively cold all the time due to environment changes caused a lot of extra stress and over time, they successfully mutated to adapt to their environment.
Answer 2:
The answer should be the 4th one. A mutation that doesn't work doesn't always fully go away, but it will become much less common.
<em>Answer :</em> the density of the N₂O at 325 K and 113.0 kPa is 1.84 kg m⁻³.
<span>
<span><em>Explanation : </em>
Density (kg/m³) = mass (kg) / Volume (m³)
</span><span> <span>d = m/V
(1)
Ideal gas law,
PV = nRT (2)</span></span></span>
<span>Where, P is
the pressure of the gas (Pa), V is the volume of the gas
(m³), n is the number of moles of gas (mol), R is
the universal gas constant ( 8.314 J mol</span>⁻¹ K⁻<span>¹) and T is temperature in
Kelvin.
n = m/M (3)
Where, n is number of moles, m is mass and M is
molar mass.
From (2) and (3),
PV = (m/M) RT
By rearranging,
P = (m/VM)RT (4)
From (1) and (4)
P = (dRT) / M
The given data,
P = 113.0 kPa = 113.0 x 10</span>³ Pa<span>
d = ?
R = 8.314 J mol</span>⁻¹ K⁻<span>¹
T = 325 K
M = </span>44.0 g/mol = 44.0 x 10⁻³ kg/mol
<span>
By substitution,</span>
113.0 x 10³ Pa = (d x 8.314
J mol⁻¹ K⁻¹ x 325 K) / 44.0 x 10⁻³ kg/mol
d = (113.0 x 10³ Pa x 44.0 x 10⁻³ kg/mol) / (8.314 J mol⁻¹ K⁻¹ x 325 K<span>)
d = 1.84 kg m</span>⁻<span>³
Hence, the density of the N</span>₂O at 325 K and 113.0 kPa is 1.84 kg m⁻³.
<span>
Assumption made is "N</span>₂O gas has an ideal gas behavior".
Answer:
A "squeaky" pop sound is heard.
Explanation:
When a metal reacts with hydrochloric acid, it produces the metal chloride (salt) and further liberates hydrogen gas which is a colourless and odourless gas.
Equation of the reaction
M(s) + HCl(aq) --> MgCl(aq) + H2(g)
A burning splint test is carried out for the identification of gases in the laboratory. A characteristic property of Hydrogen gas is that it gives a distinctive 'squeaky pop' sound.
Hydrogen is easily ignited, as it is flammable over a wide range of concentrations in air.
Answer:
C. The ability to release tremendous amounts of energy
Explanation:
The decay of massive and unstable nuclei which leads to the formation of newer atoms or nuclei accompanied by the release of energy is known as nuclear fission. In a splitting reaction such as fission, energy is released from the conversion of mass.
The energy released in a fission reaction can be used to generate electricity through a series of process. Most advanced countries in the world generates their electricity through this process.
