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liq [111]
3 years ago
5

14. What steps should you take to keep parents and the public from viewing your personal

Chemistry
1 answer:
LUCKY_DIMON [66]3 years ago
3 0
All except the last one
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How many atoms are in 45.6 g gold, Au
Gemiola [76]
<span>Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles.

45.6 g Au ( 1 mol / 196.97 g ) (  </span>6.022 x 10^23 atoms / mole ) = 1.39x10^23 atoms Au
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4 years ago
Which observations is the best evidence that unknown liquid X is a composed of only pure substance
Angelina_Jolie [31]

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A substance that is composed only of atoms having the same atomic number is ...  36 grams of an unknown liquid at its boiling point,.

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3 years ago
The process of breaking down Glucose and using the energy stored in that molecule for cellular function is known as_____.
Katyanochek1 [597]

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Cellular respiration.

Explanation:

Through the process of cellular respiration, the energy in food is converted into energy that can be used by the body's cells. During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is transferred to ATP.

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3 years ago
Drinking water may contain a low concentration of lead ion (Pb2 ) due to corrosion of old lead pipes. The EPA has determined tha
Lynna [10]

Answer:

3.861x10⁻⁹ mol Pb⁺²

Explanation:

We can <u>define ppm as mg of Pb²⁺ per liter of water</u>.

We<u> calculate the mass of lead ion in 100 mL of water</u>:

  • 100.0 mL ⇒ 100.0 / 1000 = 0.100 L
  • 0.100 L * 0.0080 ppm = 8x10⁻⁴ mg Pb⁺²

Now we <u>convert mass of lead to moles</u>, using its molar mass:

  • 8x10⁻⁴ mg ⇒ 8x10⁻⁴ / 1000 = 8x10⁻⁷ g
  • 8x10⁻⁷ g Pb²⁺ ÷ 207.2 g/mol = 3.861x10⁻⁹ mol Pb⁺²
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3 years ago
In a healthy pond, the temperature is 16°C (61°F). What is the most likely pH of this pond?
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