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3 years ago

Help! 7th Grade Math!

Chemistry

1 answer:

vagabundo [1.1K]3 years ago

6 0

Answer:

Explanation: Trust me

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What is electronegativity

mart [117]

It is a measure of the tendency of an atom to attract a bonding pair of electrons.

8 0

4 years ago

Read 2 more answers

Can someone help me?

Oduvanchick [21]

Answer:

<u>an element with a large number of valence electrons and a large atomic radius</u>

Explanation:

Electronegativity means a tedency when an atom attracts bonding electrons in a covalent bond situation.

» If an atom has many valency electrons [ <em>empty</em><em> </em><em>orbitals</em><em> </em><em>i</em><em>n</em><em> </em><em>o</em><em>u</em><em>t</em><em>e</em><em>r</em><em>m</em><em>o</em><em>s</em><em>t</em><em> </em><em>s</em><em>h</em><em>e</em><em>l</em><em>l</em><em> </em>], it has difficulty in attracting electrons hence electronegativity low.

» If an atom is large, its nuclear attraction force of incoming electrons is low hence low electronegativity.

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3 years ago

An aqueous barium chloride solution was added to a 15.0 mL sample of a sodium sulfate solution according to the reaction below.

Dimas [21]

<h3>Answer:</h3>

0.523 M

<h3>Explanation:</h3>

The reaction between barium chloride and sodium sulfate is given by

BaCl₂(aq) + Na₂SO₄(aq) → BaSO₄(s) + 2NaCl(aq)

We are given,

Volume of Na₂SO₄ = 15.0 mL

Mass of of solid BaSO₄ = 1.83 g

Required to determine the molarity of Na₂SO₄ solution

we will use the following steps

<h3>Step 1: Determine moles of the solid BaSO₄</h3>

Mass of BaSO₄ = 1.83 g

To get the number of moles we divide mass by the molar mass

Molar mass of BaSO₄ = 233.38 g/mol

Number of moles = 1.83 g ÷ 233.38 g/mol

= 0.00784 moles

<h3>Step 2: Moles of sodium sulfate used </h3>

From the balanced equation for every 1 mole of sodium sulfate used 1 mole of BaSO₄ was produced.

Therefore, the mole ratio of Na₂SO₄ : BaSO₄ is 1 : 1

Hence, moles of Na₂SO₄ will also be 0.00784 moles

<h3>Step 3: Molarity of sodium sulfate solution </h3>

Volume of sodium sulfate = 15.0 mL or 0.015 L

Number of moles = 0.00784 moles

But, molarity = Moles ÷ Volume

= 0.00784 moles ÷ 0.015 L

= 0.5227 M

= 0.523 M

Thus, the molarity of original sodium sulfate is 0.523 M

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3 years ago

Most reactions give off energy in the form of heat and are called

Anna11 [10]

Power of elements . it was highly temperature

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4 years ago

Lewis structure for CH3CL

Vsevolod [243]

Answer:

The first step in forming the ch3cl lewis structure is drawing out all the atoms that exist within the molecule or ion being studied. Then, each atom must have its atomic number written above it. After this, draw lines between every bonded pair of non-identical electrons on adjacent atoms (bonded pairs are called “bonds”).

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3 years ago