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vodka [1.7K]
3 years ago
11

In the compound mgo magnesium has an oxidation number of __________

Chemistry
2 answers:
Vitek1552 [10]3 years ago
8 0
In the compound Mgo magnesium has an oxidation number of 2 apex
Alexxx [7]3 years ago
4 0

Answer : The oxidation number of magnesium in MgO is, (+2).

Explanation :

Oxidation number : The oxidation number represent the number of electrons lost or gained by the atoms of an element in a compound.

Oxidation numbers are generally written with the sign (+) and (-) first and then the magnitude.

When the atoms are present in their elemental state then the oxidation number will be zero.

The oxidation number of  oxygen (O)  in compounds is usually -2.

The given compound is, MgO

Let the oxidation state of 'Mg' be, 'x'

x+(-2)=0\\\\x-2=0\\\\x=+2

Therefore, the oxidation number of magnesium (Mg) in MgO is, (+2)

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Calculate the energy required to heat of ethanol from to . Assume the specific heat capacity of ethanol under these conditions i
Marianna [84]

Answer:

17 kJ

Explanation:

Calculation for the Calculate the energy required to heat 0.60kg of ethanol from 2.2°C to 13.7°C.

Using this formula

q = mC∆T

Where,

q represent Energy

m represent Mass of substance=0.60kg=600g

C represent Specific heat capacity=2.44J·g−1K−1.

∆T represent change in Temperature=2.2°C to 13.7°C.

Let plug in the formula

q=(0.60 kg x 1000 g/kg)(2.44 J/gº)(13.7°C-2.2°C)

q = (600g)(2.44 J/gº)(11.5º)

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q= 17 kJ (Approximately)

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5 0
3 years ago
What is the weight of an object that has a mass of 100 kg?<br> • 100 N<br> • 200 N<br> • 980 N
Cloud [144]

Answer:i really know it is 29.09

Explanation:

8 0
3 years ago
An element with the general electron configuration for its outermost electrons of ns2np1 would be in which element group?
Firdavs [7]

Electron configuration is the electron distribution in the molecular and atomic orbital. An element with configuration ns²np¹ will be in the 3A group. Thus, option B is correct.

<h3>What is electronic configuration?</h3>

The electronic configuration has been the arrangement and distribution of the sub-atomic particle, an electron in the atomic shells.

The electronic configuration given is, ns²np¹. Here, there are three valence electrons in the outermost orbit. As it has been known that the number of the valence electron gives the number of the group.

Therefore, option B. 3A group or 13 group is the correct option.

Learn more about electronic configuration here:

brainly.com/question/11182760

#SPJ4

Your question is incomplete, but most probably your full question was, An element with the general electron configuration for its outermost electrons of ns2np1 would be in which group?

a. 2a

b. 3a

c. 4a

d. 5a

e. 8a

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2 years ago
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murzikaleks [220]

Answer:

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Explanation:

8 0
3 years ago
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Fe + Ph(NO3)2 ==&gt; Pb + Fe(NO3)2
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3 years ago
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