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Alexeev081 [22]
2 years ago
11

Match each group on the periodic table with its description. HELP ME PLS

Chemistry
1 answer:
Artist 52 [7]2 years ago
3 0
Very reactive nonmetals.
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Which of the following statements best compares the pH value of H3PO4 and HCl?
wel

Answer:

Option B. Both have a pH less than 7, but H3PO4 has a lower pH than HCl

Explanation:

Those are acid, so the pH would be < 7.

H₃PO₄ is a weak acid with 3 dissociations

HCl is a strong acid.

pH depends on [H]⁺

H₃PO₄  →  3H⁺  +  PO₄⁻³

HCl →  H⁺  +  Cl⁻

If both acid, have the same concentration, [H⁺]H₃PO₄ > [H⁺]HCl, that's why the pH from the phosphoric will be lower.

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3 years ago
19 The coefficients in a balanced chemical equation represent(l ) the mass ratios of the substances in the reaction(2) the mole
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2. The coefficients represent to molar ratios in a balanced equation.
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3 years ago
This is how platinum appears in the periodic table.A purple box has P t at the center and 78 above. Below it says platinum and b
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Answer:

3.) 195

Explanation:

Because platinum is 195.079 amu (its on the periodic table)

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3 years ago
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How many liters of hydrogen are required to react completely with 2.4L of oxygen to form water? 2H2 + O2 --&gt; 2H2O
RoseWind [281]

Answer:

2.4 mole of oxygen will react with 2.4 moles of hydrogen

Explanation:

As we know

1 liter = 1000 grams

2H2 + O2 --> 2H2O

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Weight of water = 18.01 gram /l

2 mole of oxygen react with 2 mole of H2

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