2 years ago

Please help!!!

Chemistry

1 answer:

Alekssandra [29.7K]2 years ago

8 0

True!! they can be measured without changing chemical identity.

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Biochemistry which studies the chemical composition, structure, and the reaction of compounds found in non-living organisms.

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False. Inorganic chemistry studies the chemical compounds in inorganic, or non-living things such as minerals and metals.

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2 years ago

13. What would you expect the pH of an aqueous solution of tertiary bromide in water to be (acidic, neutral, or basic)

vampirchik [111]

Answer:

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Explanation:

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3 years ago

The metal which burns with a white dazzling flame is:

7nadin3 [17]

Answer:

<h3><u>Magnesium</u></h3>

Magnesium burns with a dazzling white flame to form magnesium oxide a powdery mass.

Explanation:

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5 0

2 years ago

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How many grams of KNO3 would recrystallize from 100 g of water, if a saturated solution were cooled from 50 degrees celcius to 2

Lelechka [254]

Answer:

$m_{cryst}=58g$

Explanation:

Hello there!

In this case, according to the attached solubility chart, it is possible for us to realize that about 88 grams of KNO3 are soluble at 50 °C but just 30 grams are soluble at 20 °C in the same 100 g of water.

In such a way, the crystalized mass of this solute can be calculated by subtracting the mass at 50 °C and the mass at 20 °C:

$m_{cryst}=88g-30g\\\\m_{cryst}=58g$

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8 0

3 years ago

What is the [ H3O+] of a solution with pH = (8.50x10^0)? enter your answer in scientific notation and with three sig figs.

erastovalidia [21]

Answer:

[H₃O⁺] = 3.162 × 10⁻⁹ moles / liter

Explanation:

The pH is calculated with the formula:

pH = -lg[H₃O⁺]

From here the concentration of hydronium ion (H₃O⁺) will be:

[H₃O⁺] = $10^{-pH}$

[H₃O⁺] = $10^{-8.5}$

[H₃O⁺] = 3.162 × 10⁻⁹ moles / liter

3 0

2 years ago

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