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Alexxx [7]
3 years ago
8

The scientific theory of _________ states that populations change over time in response to changes in the environment.

Chemistry
1 answer:
Leto [7]3 years ago
5 0
Natural selection I think
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A fish tank holds 45 gal of water. How many kilograms of water are in the fish tank?
larisa [96]

Answer:

How to convert 45 gal to kg? You can use the following formula to convert from Gallon to Kilograms :

X(kg) = y(gal) / 0.264172053

To convert 45 Gallon to Kilograms:

X(oz) = 45(gal) / 0.264172053

Answer: 170.3435 kg

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2 years ago
What is the vapor pressure of an aqueous solution that has a solute mole fraction of 0.1000? The vapor pressure of water is 25.7
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Answer:

χsolvent = 1.0000 - 0.1000 = 0.9000

Use Raoult's Law:

Psolution = (χsolvent) (P°solvent)

x = (0.900) (25.756)

x = 23.18 mmHg (to four sig figs)

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