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fredd [130]
3 years ago
10

What do all prokaryotes and eukaryotes have in common? A. They are unicellular organisms. B. They are multicellular organisms. C

. The cells that make them up each contain genetic information. D. The cells that make them up each contain a membrane-enclosed nucleus.
Chemistry
1 answer:
vodomira [7]3 years ago
4 0
They are multicellular
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Determine whether a precipitate will form when 0.96g of Na2CO3 is combined with 0.20g BaBr2 in a 10 L solution.
Mashcka [7]

Answer:

Qsp > Ksp, BaCO3 will precipitate

Explanation:

The equation of the reaction is;

Na2CO3 + BaBr2 -------> 2NaBr + BaCO3

Since BaCO3 may form a precipitate we can determine the Qsp of the system.

Number of moles of Na2CO3 = 0.96g/106 g/mol = 9.1 * 10^-3 moles

concentration of NaCO3 = number of moles/volume of solution = 9.1 * 10^-3 moles/10 L = 9.1 * 10^-4 M

Number of moles of BaBr2 = 0.20g/297 g/mol = 6.7 * 10^-4 moles

concentration of BaBr2 = 6.7 * 10^-4 moles/10 L = 6.7 * 10^-5 M

Hence;

[Ba^2+] = 6.7 * 10^-5 M

[CO3^2-] = 9.1 * 10^-4 M

Qsp = [6.7 * 10^-5] [9.1 * 10^-4]

Qsp = 6.1 * 10^-8

But, Ksp for BaCO3 is 5.1*10^-9.

Since Qsp > Ksp, BaCO3 will precipitate

3 0
3 years ago
One of the most important aspects of a periodic table is that it _________________.
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B) brings order to the elements. This is correct because elements are in order by highest atomic number.
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Cells created by sexual reproduction _____.
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Contain genetic material from both mother and father ;) hoped this helps !
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Where do you measure the temperature when checking furnace temperature rise?
Maksim231197 [3]

Answer:

The rise in Air temperature is the difference between heated supply of air from the furnace and temperature of the return.

Explanation:

The temperature of the furnace should be kept within the plates range. Temperature rise of the furnace should be measured while the installation. The outside air temperature of the furnace is easy to measure whereas inside temperature is more difficult to measure. An excessive temperature rise in the furnace could cause combustion problem.

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3 years ago
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