4 years ago

Use the drop-down menus to select the part of Earth best described by each phrase.

Chemistry

2 answers:

Taya2010 [7]4 years ago

8 0

Answer:4,1,4,1

Explanation:

babunello [35]4 years ago

5 0

Answer:

4, 1, 4, 1

Explanation:

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4 years ago

A 0.797 g sample of β‑galactosidase is dissolved in water to make 0.199 L of solution, and the osmotic pressure of the solution

gulaghasi [49]

Answer:

Molecular mass of β‑galactosidase = 1.16*10^5g

Explanation:

The osmotic pressure (π) is related to the molarity (M) of a solution by the following equation:

$\Pi = i*M*R*T$

i = Von't hoff factor = 1 for non-electrolytes

R = gas constant = 0.0821Latm/mol-K

T = temperature

Based on the above equation, molarity of β‑galactosidase is:

$\M = \frac{\Pi}{iRT}=\frac{0.000842atm}{1*0.0821Latm/mol-K*(25+273)K)}= 3.44*10^{-5}mol/L$

$Moles\ galactosidase=molarity*volume= 3.44*10^{-5}moles/L*0.199L=6.85*10^{-6} moles\\\\Molar\ Mass\ galactosidase = \frac{mass}{moles} =\frac{0.797g}{6.85*10^{-6}mol } =1.16*10^{5} g$

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3 years ago

Astrology, a belief in a relationship between constellations of stars and life events,

yanalaym [24]

Answer:

Pseudoscience

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"Astrology has not demonstrated its effectiveness in controlled studies and has no scientific validity, thus regarded as pseudoscience."

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3 years ago