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Delicious77 [7]
3 years ago
9

Which of the following is true about mixtures and compounds? A compound forms when different substances chemically combine to fo

rm a new substance. A mixture contains different substances that are not chemically combined with one another. Mixtures and compounds are both made of two or more different substances. all of these
Chemistry
2 answers:
Musya8 [376]3 years ago
6 0
All of these are true
Monica [59]3 years ago
3 0
All of them are true.
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To balance this equation, first we should consider balancing C because it only presents in one reactant and one product.  Assuming the coefficient of C6H6 is 1, there are 6 C's in the reactant, so it generates 6CO2.  Then consider balancing H for the same reason. If the coefficient of C6H6 is 1, there are 6 H's in the reactant, so it generates 3H2O.
Now that the coefficient of the products are determined, we can balance O. There are 6*2=12 O's in CO2 and 3*1=3 O's in H2O.  So the total number of O in the products is 12+3 = 15.  O2 is the only reactant that contains O, so to balance the equation, the coefficient of O2 should be 15/2.
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C6H6 + 15/2O2 ⇒ 6CO2 + 3H2O.
Times both sides of the equation by 2 results the final answer:
2C6H6 + 15O2 ⇒ 12CO2 + 6H2O
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3 years ago
Imagine a 15kg block moving with a speed of 20m/s. Calculate the kinetic energy of this block.
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The kinetic energy formula is;

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The variable m represents the mass. Its unit is kilogram. We are informed that the mass of the object is 15kg. The variable v represents the linear velocity. Its unit is meter per second. We are informed that the linear velocity of the object is 20m/s. Let's find the kinetic energy of the object by substituting these values in the formula.

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