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3 years ago

5

Which choice has prokaryotic cells?

1 answer:

creativ13 [48]3 years ago

8 0

The answer is E. coli

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Using the following values of pKb, select the strongest acid from those listed in the answers. a. C5H5N (pKb = 8.75) b. N2H4 (pK

andriy [413]

I think its E..... I could be wrong

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3 years ago

Use the periodic table to find the molar mass of each of the following elements. Sodium (Na): g/mol Oxygen (O): g/mol Carbon (C)

ruslelena [56]

The Molar mass of an atom corresponds directly with its atomic mass on the periodic table.

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3 years ago

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A block of magnesium has a mass of 14.3 g and a volume of 8.46 cm3. What is the density of

sveta [45]

Density is mass over volume, so:
14.3/8.46≈ 1.6903 g/cm^3

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2 years ago

What physical property of materials depends on the ability of electrons to move

Alisiya [41]

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3 years ago

At a certain temperature the vapor pressure of pure chloroform (CHCl3) is measured to be 91. torr. Suppose a solution is prepare

OleMash [197]

Answer:

$P_{CCl_4}=52.43torr$

Explanation:

Hello there!

In this case, sine the solution of this problem require the application of the Raoult's law, assuming heptane is a nonvolatile solute, so we can write:

$P_{CCl_4}=x_{CCl_4}P_{CCl_4}^{vap}$

Thus, we first calculate the mole fraction of chloroform, by using the given masses and molar masses as shown below:

$x_{CCl_4}=\frac{140/153.81}{140/153.81+67.1/100.21}=0.576$

Therefore, the partial pressure of chloroform turns out to be:

$P_{CCl_4}=0.576*91torr\\\\P_{CCl_4}=52.43torr$

Regards!

3 0

3 years ago