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Arada [10]
3 years ago
12

What is the oxidation number for zinc? How does zinc's electron configuration account for this oxidation number?

Chemistry
1 answer:
IRINA_888 [86]3 years ago
8 0
+2 is the oxidation number for Zinc
<span>Oxidation Number for a Transition metal = Number of Unpaired d-electrons + Two s-electrons  
</span>[Ar]4s2 3d10 is the electron configuration for zinc. The d-block is full with 10 electrons meaning there are no unpaired d-electrons, so the oxidation number is 0 unpaired d-electrons + 2 s-electrons = +2
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the pressure of 1 mol of gas is decreased to 0.05 atm 273.k. what happens to the molar volume of the gas under these conditions?
svp [43]

The molar volume of the gas : V = 447.993 L

<h3>Further explanation</h3>

Given

n = 1 mol

P = 0.05 atm

T = 273 K

Required

The molar volume

Solution

Ideal gas law :

PV=nRT

V = nRT/P

Input the value :

V = 1 x 0.08205 x 273 / 0.05

V = 447.993 L

6 0
3 years ago
How many grams of potassium chloride are in 6.90 moles? 10.8g 74.6g 257g 514g
Vedmedyk [2.9K]
The potassium chloride is KCl. The gram formula mass of KCl is 39+35.5=74.5 g/mol which means 74.5 g per mole of KCl. So the mass of KCl is 6.90*74.5=514 g.
3 0
3 years ago
5.63 moles of a gas is at 20.0° C. At that temperature the
lilavasa [31]

Answer:

6.8746142857L

Explanation:

Using ideal gas equation PV=nRT

3.50V=5.63*.0821L * atm/mol*K * (20.0C+273.15C)

4 0
3 years ago
Mass of 2.88x10^-4 mol of ascorbic acid
Lady bird [3.3K]
Molar mass C₆H₈O₆ = 176.12 g/mol

1 mole ------------------ 176.12 g
2.88x10⁻⁴ mole -------  ?

mass = 2.88x10⁻⁴ * 176.12 / 1

mass ≈ 0.05072 g

hope this helps!
8 0
4 years ago
Select all that apply:
lesya [120]

Option B, C and D are correct.

<h3><u>Explanation:</u></h3>

Carbon is a non metallic element with the atomic number 6 and mass number 12. Whereas oxygen is also a non metallic element with the atomic number 8 and mass number of 16.

In carbon monoxide, the mass ratio of oxygen to carbon is 16:12 =1.33. This ratio is same for every sample of carbon monoxide, because carbon monoxide has the universal formula of CO.

Similarly In carbon dioxide , the mass ratio of oxygen to carbon is 32:12 =2.667. This ratio is same for every sample of carbon dioxide, because carbon dioxide has the universal formula of CO_2.

Even we can see that the mass ratio of oxygen to carbon in carbon dioxide is just twice the mass ratio of oxygen to carbon in carbon monoxide, because of presence of twice as much as oxygen per molecule of carbon dioxide than carbon monoxide.

3 0
3 years ago
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