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TEA [102]
2 years ago
8

Count the total number of atoms in the chemical formula 5H2O2

Chemistry
1 answer:
SVEN [57.7K]2 years ago
5 0

Answer:

20 atoms

Explanation:

There are 4 in H2O2 because of 2 hydrogens and 2 oxygens.

Then, multiply by 5 because the coefficient is 5, therefore there are 5 H2O2 molecules.

5 x 4 = 20

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Using the ideal gas law: PV=nRT
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Metamorphic rock formation from sedimentary rocks is caused by heat and pressure. After millions of years in transformation, the
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3 years ago
Determine the [H+] or [OH−] for each of a solutions at 25°C.
levacccp [35]

Answer:

Solution B: [OH-] = 1×10^–6 M

Solution C: [OH-] = 1×10^–6 M

Explanation:

Solution B:

Hydronium ion concentration, [H3O+] = 9.99×10^–9 M

Hydroxide ion concentration, [OH-] = ?

The Hydroxide ion concentration, [OH-] can be obtained as follow:

[H3O+] × [OH-] = 1×10^–14

9.99×10^–9 × [OH-] = 1×10^–14

Divide both side by 9.99×10^–9

[OH-] = 1×10^–14 / 9.99×10^–9

[OH-] = 1×10^–6 M

Therefore, the Hydroxide ion concentration, [OH-] is 1×10^–6 M

Solution C:

Hydronium ion concentration, [H3O+] = 0.000777 M

Hydroxide ion concentration, [OH-] = ?

The Hydroxide ion concentration, [OH-] can be obtained as follow:

[H3O+] × [OH-] = 1×10^–14

0.000777 × [OH-] = 1×10^–14

Divide both side by 0.000777

[OH-] = 1×10^–14 / 0.000777

[OH-] = 1.29×10^–11 M

Therefore, the Hydroxide ion concentration, [OH-] is 1.29×10^–11 M

6 0
3 years ago
How are the respiratory, urinary, and integumentary systems involved in the removal of waste. (list)
Vilka [71]

Answer:

<h2>The lungs in the respiratory system excrete some waste such as carbon dioxide. The bladder helps to remove waste by urination.</h2>
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3 years ago
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