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zhuklara [117]
3 years ago
7

Scientists think the earth is approximately how old?

Chemistry
2 answers:
tiny-mole [99]3 years ago
6 0

I think the answer is approximately 4.12 billion years since the amount of years is 4.543 billion years

AlexFokin [52]3 years ago
4 0

Answer:

Option C. 4.12 Billion years. Hope this helps!!

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What is the reaction scheme for the experiment of synthesis of methyl salicylate
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The methyl salicylate (wintergreen oil) is the methyl ester of salicylic acid.

Methyl salicylate is produced by esterifying salicylic acid with methanol, the reaction scheme is attached to this answer. In the past, it was commonly distilled from the twigs of Betula lenta (sweet birch) and Gaultheria procumbens (eastern teaberry or wintergreen).

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Which best describes thermal energy? It is the difference between internal energies of two or more substances. It is the sum of
Anit [1.1K]

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Which of the following answers is true for the following statement?
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What is the osmotic pressure of a solution made from 22.3 g of methanol (MM = 32.04 g/mol) that was added to water to make 321 m
xxMikexx [17]

Answer: The osmotic pressure of a solution is 53.05 atm

Explanation:

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

\pi=iMRT

Or,

\pi=i\times \frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}\times RT

where,

\pi = osmotic pressure of the solution = ?

i = Van't hoff factor = 1 (for non-electrolytes)

Mass of solute (methanol) = 22.3 g  

Volume of solution = 321 mL

R = Gas constant = 0.0821\text{ L.atm }mol^{-1}K^{-1}

T = temperature of the solution = 25^oC=[273+25]=298K

Putting values in above equation, we get:

\pi=1\times \frac{22.3\times 1000}{32.04\times 321}\times 0.0821\text{ L.atm }mol^{-1}K^{-1}\times 298K

\pi=53.05atm

Hence, the osmotic pressure of a solution is 53.05 atm

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The atomic radius increases down a column (group) and decreases along a row
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