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Fittoniya [83]
3 years ago
6

Which statement describes an element?

Chemistry
1 answer:
Anit [1.1K]3 years ago
5 0

Elements are substance that can not be broken down into simpler substance by ordinary chemical process

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Explain the voyage of water molecules as it boils in water
Ierofanga [76]
Hot water rises cold water sinks. So the warm water will stay at the bottom. Transfer of heat through the molecules will make all the water boil
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How much heat energy would be needed to raise the temperature of a 223 g sample of aluminum [(C=0.895 Jig Cy from 22.5°C to 55 0
dsp73

Answer : The heat energy needed would be, 6486.5125 J

Explanation :

To calculate the change in temperature, we use the equation:

q=mc\Delta T\\\\q=mc(T_2-T_1)

where,

q = heat needed = ?

m = mass of aluminum = 223 g

c = specific heat capacity of aluminum = 0.895J/g^oC

\Delta T = change in temperature

T_1 = initial temperature = 22.5^oC

T_2 = final temperature = 55.0^oC

Putting values in above equation, we get:

q=223g\times 0.895J/g^oC\times (55.0-22.5)^oC

q=6486.5125J

Therefore, the heat energy needed would be, 6486.5125 J

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3 years ago
What are the coefficients that will balance the skeleton equation below?alcl3 + naoh → al(oh)3 + nacl?
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AlCl3 + 3NaOH -> Al(OH)3 + 3NaCl

1 3 1 3
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In an addition reaction, which bond of the reactant is broken?
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Answer:  c

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A reaction in which two or more molecules combine together to result in the formation of a larger molecules then this type of reactions are known as addition reactions.

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