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kipiarov [429]
3 years ago
5

Which of the following is a compound machine?

Chemistry
2 answers:
uysha [10]3 years ago
5 0
Fortnite car obviously
tangare [24]3 years ago
5 0

Answer: I think it is a bicycle

Explanation: A bicycle has many parts

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Why is steam distillation prefered over fractional distillation for the extraction of essencial oils?​
frez [133]

Answer:

Because , the advantage of steam distillation over simple distillation is that the lower boiling point reduces decomposition of temperature-sensitive compounds. Steam distillation is useful for the purification of organic compounds, although vacuum distillation is more common

Explanation:

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Descreva as principais caracteristícas dos compostos ionicos
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a) They are solid at ambient temperatures of 25 ° C and pressure of 1 atm.

b) Ionic compounds represent high temperature melting and boiling.

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d) When dissolved in water, or pure liquid, carry electrical current due to the existence of ions that move freely and can be attracted by the electrodes, closing the electric circuit.

<span>e) His solvent is water. </span>

3 0
3 years ago
What occurs at stage A?
Alex_Xolod [135]

Answer:

water evaporate from surfaces

Explanation:

after it clumps to air to make clouds ,cools turn to liquid and rains or precipitate and becomes runoff

4 0
3 years ago
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(b) what is the major product of the reaction at very low temperatures?
svlad2 [7]
The reaction is low b/c of  the tempature. that's why.
8 0
4 years ago
The half-life of silicon-32 is 710 years. If 40 grams is present now, how much will be present in 800 years
Licemer1 [7]

18 g of silicon-32 will be present in 800 years.

A radioactive half-life refers to the amount of time it takes for half of the original isotope to decay and it's given by

                              N(t) = N_0 (\frac{1}{2}) ^\frac{t}{t_\frac{1}{2} }

where,

N(t) = quantity of the substance remaining

N_0 =  the initial quantity of the substance

t =  time elapsed

t_1_/_2 = the half-life of the substance

From the given information we know:

The initial quantity of silicon-32 is 40 g.

The time elapsed is 800 years.

The half-life of silicone-32 is 710 years.

So, using the calculation above, we can determine how much silicon-32 is left.

                  N(t) = 40 (\frac{1}{2}) ^\frac{800}{710} \\N(t) = 40 (\frac{1}{2}) ^\frac{80}{71} \\\\N(t) = 18 g

Therefore,18 g of silicon-32 will be present in 800 years.

Learn more about half-life here:

brainly.com/question/25750315

#SPJ4

5 0
2 years ago
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