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2 years ago

What’s the answer to this

Chemistry

2 answers:

Svetllana [295]2 years ago

6 0

Answer:

B and D as well

Explanation:

All the electronic configuration of the elements of B end on s sub shell.

S energy level sub shell can hold 2 electrons and since Be, Mg, Ca Sr end in s.

We can say, they have same valence electrons, i.e 2 electrons.

Evgesh-ka [11]2 years ago

4 0

Answer:

Explanation:

<h2>The elements given in V and D have the same number of occupied energy levels.</h2>

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Modify the given fatty acid so that it represents the 18‑carbon fatty acid designated 18:2(Δ9,12). Draw any double bonds in the

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Answer:

See explanation

Explanation:

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3 years ago

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2 years ago

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1. Given the specific heat of lead is 0.129 J/g.C and that it takes 93.4J of energy to

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The quantity of Heat Energy (Q) required to heat a substance depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)

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Then, Q = MCΦ

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3 years ago

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Empirical formula of a compound composed of 32.1 g potassium (k) and 6.57 g oxygen (o)?

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The empirical formula is K₂O.

The empirical formula is the <em>simplest whole-number ratio</em> of atoms in a compound.

The <em>ratio of atom</em>s is the same as the <em>ratio of moles</em>.

So, our job is to calculate the <em>molar ratio</em> of K to O.

Step 1. Calculate the <em>moles of each element </em>

Moles of K = 32.1 g K × (1 mol K/(39.10 g K =) = 0.8210 mol K

Moles of O = 6.57 g O × (1 mol O/16.00 g O) = 0.4106 mol 0

Step 2. Calculate the <em>molar ratio of each elemen</em>t

Divide each number by the smallest number of moles and round off to an integer

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Step 3: Write the <em>empirical formula </em>

EF = K₂O

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2 years ago