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Vika [28.1K]
3 years ago
8

Pleaseee helpppppppp​

Chemistry
1 answer:
ahrayia [7]3 years ago
6 0

Answer:

Potassium

1s2 2s2 2p6 3s2 3p6 4s1

Explanation:

The atom having only one electron its outermost shell must belong to an element in group one of the periodic table.

Having noted that, we proceed to find out what element in group one that has the atom just described in the question.

That atom must belong to an element in the fourth period. The only group 1 element in the fourth period is potassium.

The electron configuration of potassium is;

1s2 2s2 2p6 3s2 3p6 4s1

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To what volume would you need to dilute 200 mL of a 5.85M solution of Ca(OH)2 to make it a 1.95M solution?
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Answer: 600 mL

Explanation:

Given that;

M₁ = 5.85 m

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Now from the dilution law;

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so we substitute

5.85 × 200 = 1.95 × V₂

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Answer:

You right!

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Jobisdone [24]
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use the formula: n(moles) = mass ÷ molar mass
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Then use Avogadro's Constant : 6.023 x 10^23
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3 years ago
List 1 advantage and 1 disadvantage of a series circuit.<br><br><br><br> Please help!!!
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<h2>The advantage is that, you can add additional power devices usually using batteries.</h2>

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0.08875

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Hello,

In this case, the first step is to compute the difference in the electronegativity for the formed bond between gallium and phosphorous by:

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Thus, we can compute the percentage of ionic character by:

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