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MissTica
3 years ago
5

Which of these best describes a scientific model?

Chemistry
1 answer:
goblinko [34]3 years ago
3 0
The answer a way of explaining a complex concept.
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How many moles are in 2.00g of beryllium chloride
lisabon 2012 [21]

Answer:

\huge\bold\color{pink}{- Magdonal -}

\huge\red{\overline{\qquad\qquad\qquad\qquad}}

\pink{\rule{1pt}{999999pt}}

6 0
2 years ago
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A solution contains 15 ppm of benzene. The density of the solution is 1.00 g/mL. This means that ________.
snow_tiger [21]

Answer:

  • second choice:<em><u> 1.0 g of the solution contains 15 × 10⁻⁶ g of benzene.</u></em>

Explanation:

ppm is a unit of concentration that means parts per million. In grams that is grams of solute per one million (10⁶) grams of solution.

Then, <em>15 ppm of benzene</em> means that there are 15 grams of benzen in 1,000,000 grams of solution.

That leads to:

  • 1,000,000 g solution / 15 g benzene

Multiplying numerator and denominator by 10⁻⁶ you find:

  • 1,000,000 × 10⁻⁶ g solution / (15 × 10⁻⁶ g benzene)

Simplifying:

  • 1.0 g solution / (15 × 10⁻⁶ g benzene)

Which is read as 1.0 g of the solution contains 15 × 10⁻⁶ g of benzene, i.e. the second answer choice.

6 0
3 years ago
How does increasing the temperature of a liquid below the boiling point affect
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When the particles of a substance (usually a liquid) is heated up, its particles absorb the energy provided thereby increasing their kinetic energy resulting to more movement of the individual particles.
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Which tools would be necessary to determine whether or not a large regular block will float, without using water?
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Scale and measuring tape. 
To determine the mass and volume, you can find the density. The block will float if its density is less than that of water.
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3 years ago
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How many particles are in 2.0 moles of CH4
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Answer: There are 4.8 x 1024 hydrogen atoms in 2.0 moles of CH4

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2 years ago
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