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luda_lava [24]
3 years ago
13

Which group of atoms has this electron dot structure? noble gases non-metals metals network solids alkaline liquids

Chemistry
1 answer:
jek_recluse [69]3 years ago
3 0
The Answer is Noble gases.
It's consequential to note that helium has only two electrons so it does not have the equal electron dot structure as the other noble gases. Electron dot structure displays the number of valence electrons (electrons in the highest energy level) for an atom.
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Mercury(II) oxide (HgO) decomposes to form mercury (Hg) and oxygen (O2). The balanced chemical equation is shown below.
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15.63 mol. You need 15.63 mol HgO to produce 250.0 g O_2.

<em>Step 1</em>. Convert <em>grams of O_2 to moles of O_2</em>

Moles of O_2 = 250.0 g O_2 × (1 mol O_2/32.00 g O_2) = 7.8125 mol O_2

<em>Step 2</em>. Use the molar ratio of HgO:O_2 to convert <em>moles of O_2 to moles of HgO </em>

Moles of HgO = 0.8885 mol O_2 × (2 mol HgO/1 mol O_2) = <em>15.63 mol HgO</em>

7 0
3 years ago
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Bad White [126]

Answer:

thick, insulating fur

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3 years ago
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Calculate the heat absorbed by the water in a calorimeter when 175 grams of lead cools from 125.0°C to 22.0°C. The specific heat
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Answer:

Q = 233.42 J

Explanation:

Given data:

Mass of lead = 175 g

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Solution:

Heat  absorbed by water is actually the heat lost by the metal.

Thus, we will calculate the heat lost by metal.

Formula:

Q = m.c. ΔT

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c = specific heat capacity of substance

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ΔT = T2 - T1

ΔT = 22.0°C - 125.0°C

ΔT = -103°C

Q = 175 g × 0.01295 J/g.°C×-103°C

Q = -233.42 J

Heat absorbed by the water is 233.42 J.

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3 years ago
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Velocity = 15 m/s

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