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bulgar [2K]
4 years ago
11

Does anyone know the answer I need help

Chemistry
1 answer:
borishaifa [10]4 years ago
4 0

Answer:

Can you put other picture because the picture is blurry? please

Explanation:

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How much energy is required to raise the temperature of 3 kg of iron from 20°
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Answer:

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3 years ago
What simple machine would be best for lifting a couch through a 3rd floor apartment window?
egoroff_w [7]

Answer:

Pully

Explanation:

I would think that a pully would be most effective for lifting it Up and into the apartment (at least if you have a suitable spot to put the pully)

7 0
3 years ago
Calculate the empirical formula of a compound that is 42.9% Carbon and 57.1% Oxygen.
Marrrta [24]

Answer:

CO.

Explanation:

Assuming the given percentages are by mass, we can solve this problem via imagining we have <em>100 g of the compound</em>, if that were the case we would have:

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  • 57.1 g of O

Now we <u>convert those masses into moles</u>, using the<em> elements' respective molar masses</em>:

  • 42.9 g of C ÷ 12 g/mol =  3.57 mol C
  • 57.1 g of O ÷ 16 g/mol =  3.58 mol O

As the number of C moles and O moles is roughly the same, the empirical formula for the compound is <em>CO</em>.

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Describing Describe the general process by which new elements are synthesized.

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Which of the following statements is true?
tiny-mole [99]
Statement A is true
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