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worty [1.4K]
3 years ago
13

HELP ME please i need help with this

Chemistry
1 answer:
nadezda [96]3 years ago
7 0
4)
a) Natural selection will work negatively against rabbits that only eat berries as the drought is preventing berries from growing. It wont have any negative impact on rabbits that only eat grass as the grass is still surviving.

b) The statement ‘population has variations’ is backed up by the fact that the rabbits eat different things. They aren’t all the same. The statement ‘some variations are favorable’ is backed up by the fact that the rabbits that only eat grass are able to survive the drought. Their variation in eating grass instead of berries let’s them live. The statement ‘a population will change over time’ is backed up by the fact that the rabbits that only eat berries will die out. This will not only change the size of the population but going forward will create a population that has more rabbits that eat only grass on account of natural selection.
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After cloud droplets form, what must happen to them for precipitation to occur?
mr Goodwill [35]

For precipitation to happen, first tiny water droplets must condense on even tinier dust, salt, or smoke particles, which act as a nucleus. Water droplets may grow as a result of additional condensation of water vapor when the particles collide. If enough collisions occur to produce a droplet with a fall velocity which exceeds the cloud updraft speed, then it will fall out of the cloud as precipitation.

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3 years ago
A chemist is studying small organic compounds for their potential use as an antifreeze. When 0.243 g of a compound is dissolved
harina [27]

Molar mass = 144.2 g/mol.

<h3>Calculate Molar mass.</h3>

Formula to solve this: ΔT = Kf . m

ΔT → Freezing point of pure solvent - Freezing point of solution

0°C - (-1.94°C) = 1.86 °C/m . m

1.94°C / 1.86 m/°C = m →  1.04 m

1.04 are the moles of solute in 1kg of solvent → molality (mol/kg)

Let's convert the mass of our solvent in kg to determine the moles.

80 g . 1kg / 1000 g = 0.08 kg

Molality . kg of solvent → Solute moles

1.04 mol/kg . 0.080 kg = 0.0832 moles

These are the moles of 12 g of solute. To find the molar mass → g/mol

12 g / 0.0832 mol = 144.2 g/mol

To learn more about Molar mass from the given link:

brainly.com/question/14787860

#SPJ4

4 0
1 year ago
Which element requires the least amount of energy to remove the outer-most electron from a gaseous atom in the ground state?
dsp73
<span>the element that requires the least amount of energy to remove the outer-most electron from a gaseous atom in the ground state is  s</span><span>odium</span>
8 0
3 years ago
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Which of the following best describes repulsions?
poizon [28]
A. to push each other away
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3 years ago
What are two examples of an endothermic reaction and what are two examples of an ectothermic reaction?
natka813 [3]
Exothermic processes: Making ice cubes,formation of snow in clouds


Endothermic processe: Melting ice cubes, evaporation of water
7 0
4 years ago
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