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Sonja [21]
3 years ago
7

How many kilocalories of heat are required to raise the temperature of 225 g of AL (Cal = 0.21 cal/gC) from 20.0 C to 100 C

Chemistry
1 answer:
WITCHER [35]3 years ago
3 0

Answer:

sjsjsjs

Explanation:

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In rabbits, the gene for black fur is dominant (F), but the gene for white fur
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A white rabbit would therefore have (ff)

If a trait is recessive, then it can only be expressed if both alleles (individual letters) are recessive (lowercase).
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Hen the external pressure is 404 kPa, what is the vapor pressure of water at its boiling point?
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At the boiling point, external pressure is equal to the vapor pressure of water. Therefore, the vapor pressure of water at an ecternal pressure of 404 kPa is equal to 404 kPa as well. Hope this answers the question. Have a nice day. Feel free to ask more questions.
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A ramp 20 m long and 4 m high is used to lift a heavy box. A pulley system with 4 rope sections supporting the load is used to l
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3 years ago
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Answer:

C) The puck gradually slows down because friction would be acting on it.

Explanation:

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7 0
3 years ago
A 0.10 M aqueous solution of sodium sulfate, Na2SO4, is a better conductor of electricity than a 0.10 M aqueous solution of sodi
Dvinal [7]

Answer: D) More moles of ions are present in a given volume of 0.10 M Na_2SO_4 than in the same volume of 0.10 M NaCl.

Explanation:

A electrolyte is a solution that dissociates completely when dissolved in water. The ions act as good conductors of electric current in the solution.

More is the number of ions , more will be the conductance and hence the solution will be a better conductor of electricity.

0.10 M aqueous solution of Na_2SO_4 is a better conductor of electricity as it dissociates to give three ions whereas 0.10 M aqueous solution of NaCl dissociates to give two ions only.

Na_2SO_4\rightarrow 2Na^++SO_4^{2-}

NaCl\rightarrow Na^++Cl^{-}

Thus 0.10 M aqueous solution of sodium sulfate, Na_2SO_4 , is a better conductor of electricity as more moles of ions are present in a given volume of 0.10 M Na_2SO_4 than in the same volume of 0.10 M NaCl

3 0
4 years ago
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