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3 years ago

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The electron configuration of a Mn atom is 1s2 2s2 2p6 3s2 3p6 4s2 3d5. Determine the number of unpaired electrons in the Mn ato

m. Manganese contains unpaired electron(s).

1 answer:

pickupchik [31]3 years ago

8 0

Explanation:

it contains 5 unpaired electron in 3d

3d must filled with 10 electrons and there is 5 only

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Covalent compounds are generally not very hard. Justify the statement.

Eduardwww [97]

Covalent compounds are generally not very hard because they are formed by two or more nonmetallic atoms.

<h3>COVALENT COMPOUNDS:</h3>

Covalent compounds are compounds whose constituent elements are joined together by covalent bonds.

Covalent bonding occurs when two or more nonmetallic atoms of an element share valence electrons. This means that covalent compounds will not be physically hard since they constitute non-metals.

Examples of covalent compounds are:

H2 - hydrogen
H2O - water
HCl - hydrogen chloride
CH4 - methane

Learn more about covalent compounds at: brainly.com/question/21505413

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3 years ago

Green plants absorb sunlight to power photosynthesis, the chemical synthesis of food from water and carbon dioxide. The compound

tekilochka [14]

Answer: The frequency of this light is $6.74\times 10^{17}Hz$ .

Explanation:-

To calculate the frequency of light, we use the equation:

$\lambda=\frac{c}{\nu}$

where,

$\lambda$ = wavelength of the light = $430nm=430\times 10^{-9}m$ $1nm=10^{-9}m$

c = speed of light = $2.9\times 10^8m/s$

$\nu$ = frequency of light = ?

$\nu=\frac{c}{\lambda}$

$\nu=\frac{2.9\times 10^8m/s}{430\times 10^{-9}m}$

$\nu=\frac{2.9\times 10^8m/s}{430\times 10^{-9}m}=6.74\times 10^{17}s^{-1}=6.74\times 10^{17}Hz$

The frequency of this light is $6.74\times 10^{17}Hz$ .

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4 years ago

Juan and Jose are having an argument about their science book. Juan says that since the book is sitting still, there are no forc

Mariana [72]

Answer:

Jose is right

Explanation:

As the book is sitting still on the table, it is being acted upon by two forces of equal magnitude and opposite direction. Theses are;

i) The weight of the book

ii) The normal reaction on the book

The weight of the book acts downwards while the normal reaction acts upwards. These two forces exactly counterbalance each other hence the book sits still on the table.

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3 years ago

Fernanda looked at a sample of paint under a microscope. At right is the sketch she made of what she saw. Label A points to the

Degger [83]

Answer:dispersed state

dispersed medium

colloid

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3 years ago

Read 2 more answers

What volume will 2.0 moles of nitrogen occupy at .947atm and 20° C?

Alex17521 [72]

Answer:

The volume is 50, 74 l

Explanation:

We use the formula PV = nRT. The temperature in Kelvin is = 273+ 20 =293K

PV=nRT ---> V = (nRT) / P

V= (2.0 mol x 0,082 l atm /K mol x 293 K) / 0,947 atm

V=50,74128828 l

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3 years ago