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Citrus2011 [14]
3 years ago
11

A probe sent to the planet mercury has measured the electronegativities of several elements it has detected on the planet. eleme

nt 1 2 3 4 5 electronegativity, χ 2.58 1.88 2.10 2.60 3.16 which element would you expect to identify as a metal?
Chemistry
1 answer:
Ivahew [28]3 years ago
3 0
<span>A metal is one which ionizes easily and gives electrons whencompared to other elements. So it should have a lower ionization energy. Hence we would expect element 2 to be a metal.</span>
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If 44.7 g of KCI (MM = 74.55 g/mol) are added to a 500.0 mL volumetric flask, and water is added to fill the flask, what is the
navik [9.2K]

1.199 M is the concentration of KCI in the resulting solution.

<h3 /><h3>What are moles?</h3>

A mole is defined as 6.02214076 × 10^{23} of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

No.of moles of KCI

Moles = \frac{mass}{molar \;mass}

Moles = \frac{44.7 g}{74.5513 g/mol}

= 0.599 moles

Vol.of the solution,V= 500 ml

= 0.5 liter

Molarity

Molality = \frac{Moles \;solute}{Volume \;of \;solution \;in \;litre}

Molality = \frac{0.599 moles}{0.5 liter}

= 1.199 M

Hence, 1.199 M is the concentration of KCI in the resulting solution.

Learn more about moles here:

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6 0
3 years ago
How many moles of carbon dioxide are produced when 5.12 mol of propane gas is burned in excess oxygen? C3H8(g) + 5O2(g) → 3CO2(g
maxonik [38]

Answer:

15.4 mol CO₂

Explanation:

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4 0
3 years ago
Read 2 more answers
PLEASE HELP
LenaWriter [7]

Hello!


I don't know a lot of this but after doing just a bit of research I think the answer is either A. or C. but I think it is A.


Hope it helps?

5 0
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zhenek [66]

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3 years ago
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hodyreva [135]
Thomson's model of the atom was called the plum pudding model. He discovered electrons, so he placed them in the atoms. This was before the nucleus was discovered.

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8 0
4 years ago
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