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3 years ago

Which of the following contains atoms that are diamagnetic in their ground state

Chemistry

1 answer:

Agata [3.3K]3 years ago

8 0

E.

The diamagnetic elements are hydrogen, helium, beryllium, boron, carbon, nitrogen, neon, silicon, phosphorous, sulfur, chlorine, argon, copper, zinc, gallium, germanium, arsenic, selenium, bromine, krypton, silver, cadmium, indium, tin, antimony, tellerium, iodine, xenon, gold, mercury, thallium, lead, and bismuth.

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Consider the energy diagram below.

Kazeer [188]

Answer:

A) The catalyzed reaction passes through C.

Explanation:

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2 years ago

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How much of a 0.250 M lithium hydroxide is required to neutralize 20.0 mL of 0.345M chlorous acid?

Bumek [7]

Answer:

27.6mL of LiOH 0.250M

Explanation:

The reaction of lithium hydroxide (LiOH) with chlorous acid (HClO₂) is:

LiOH + HClO₂ → LiClO₂ + H₂O

<em>That means, 1 mole of hydroxide reacts per mole of acid</em>

Moles of 20.0 mL = 0.0200L of 0.345M chlorous acid are:

0.0200L ₓ (0.345mol / L) = <em>6.90x10⁻³ moles of HClO₂</em>

To neutralize this acid, you need to add the same number of moles of LiOH, that is 6.90x10⁻³ moles. As the LiOH contains 0.250 moles / L:

6.90x10⁻³ moles ₓ (1L / 0.250mol) = 0.0276L of LiOH =

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2 years ago

The molar heat of fusion of platinum (Pt) is 4.700 kcal/mol. How much heat must be added to 85.5 g of solid platinum at its melt

Andre45 [30]

The heat required to completely melt the given substance, platinum, we just have to convert first the given mass in mole and multiply the answer to its molar heat of fusion..
Hf = mass x (1/molar mass) x molar heat of fusion
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Hf = 2.06 kcal

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3 years ago

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A scientist wants to make a solution of tribasic solution phosphate, na3po4, for a laboratory experiment. How many grams of na3p

timurjin [86]

Answer:

55.75g

Explanation:

From

m/M = CV

Where

m= required mass of solute

M= molar mass of solute

C= concentration of solution

V= volume of solution=675ml

Molar mass of solute= 3(23) + 31 + 4(16)= 69+31+64=164gmol-1

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Since 1 mole of Na3PO4 contains 3 moles of Na+

It implies that 1.01/3 moles of Na3PO4 are present in solution= 0.34moles

mass of Na3PO4= number of moles × molar mass= 0.34 × 164 =55.75g

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3 years ago

What process puts water vapor into the atmosphere?

cricket20 [7]

Answer:

transpiration

Explanation:

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