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DENIUS [597]
3 years ago
9

Helpppppppppppppppppppppppppppppppppppppppppppppppppppp

Chemistry
2 answers:
lbvjy [14]3 years ago
4 0
Its b, not all mixtures are homogeneous 
statuscvo [17]3 years ago
3 0
The answer is C ^^ hope i helped
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There are 43.2 g of carbon to 14.4 g of hydrogen in a sample of methane (CH4). What percent of 37.8 g of methane is carbon?
EastWind [94]

Using the law of constant proportions  which says that within the same compound, elements exist in fixed ratios. 

Therefore; we can use the ratio of total mass to the mass of carbon, to determine the amount of carbon in another sample.

Mass C / Mass CH4 = Mass C / Mass CH4

43.2 g / 57.6 g = Mass C / 37.8 g

Mass C = 37.8 g × 43.2 g / 57.6 g 

              = 28.35 g

Hence; the percentage of carbon will be; 

=(28.35/ 37.8 )× 100%

= 75 % 

Thus; 75% of 37.8 g of methane is carbon

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3 years ago
Substances that dissolve in water nd give up OH-ions are considered what
just olya [345]

Your answer would be an Arrhenius base

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1 year ago
The law of conservation of matter states that matter is neither created nor destroyed in a chemical reaction. Which of the follo
Artyom0805 [142]

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A

Explanation:

4 0
3 years ago
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An organism contains chloroplasts in its cells which allows it to make its own food. What Kingdom is it in?
Alina [70]

Answer:

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Carbon diselenide (CSe2) is a liquid at room temperature. The normal boiling point is 125°C, and the melting point is –45.5°C. C
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Answer:

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        CO_{2}< CS_{2} < CSe_{2}

The normal boiling point of CSe2 is 125°C and that of CS2 is 116°C, which explains the trend that as we move down the group, the boiling point of e compound increases as the size increases.

This usually happens because larger and heavier atoms have a tendency to exhibit greater inter molecular strengths due to the increase in size . As the size increases, the valence shell electrons move far away from the nucleus, thus has a greater tendency to attract the temporary dipoles.

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