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2 years ago

How many nitrogen atoms are in 10.2 g of copper(ii) nitrate?

1 answer:

5 0

To determine the number of nitrogen atoms in the given amount of a compound, we need to know the number of moles of nitrogen. In order to come to this, its is important tht we know the chemical formula of the compound which would be Cu(NO3)2 (molar mass = 187.56 g/mol). When we obtain the moles of nitrogen, we use Avogadro's number to convert the number of moles to atoms.

Moles Cu(NO3)2 = 10.2 g Cu(NO3)2 ( 1 mol / 187.56 g ) = 0.0544 mol
Moles N = 0.0544 mol Cu(NO3)2 ( 2 mol N / mol Cu(NO3)2 ) = 0.109 mol
Atoms N = 0.109 mol N ( 6.022 x20^23 atoms N / mol N ) = 6.55x10^22 atoms N

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Why does carbon have the ability to form multiple bonds?

stepan [7]

Carbon has the ability to form multiple bonds because it has four valence electrons. Having four valence electrons means that carbon has a lot of space to form bonds with other atoms, or multiple bonds, in order to reach the full octet.

Hope this helps!! :)

7 0

3 years ago

How many molecules are there in 122 grams of Cu(NO3)2?

ipn [44]

Cu =63.5
2 times N =28.02
6 times O =96
96=63.5=28.02=127.07
122/127.07=.96 molecules

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2 years ago

Draw the lewis structure for butanal, which has the condensed formula ch3(ch2)2cho. show all hydrogen atoms and lone pairs of el

sergejj [24]

There are 10 hydrogen atoms that bind and there are 2 pairs of free electrons in the non-binding O atom

<h3>Further explanation</h3>

Aldehydes are alkane-derived compounds containing carbonyl groups (-CO-) where one bond binds to an alkyl group while another binds to a hydrogen atom.

The general structure is R-CHO with the molecular formula :

$\large{\boxed{\boxed{\bold{C_nH_{2n}O}}}$

Naming is generally the same as the alkane by replacing the suffix with -al

Butanal or butyraldehyde is an aldehyde which has 4 C atoms

Inside the structure there are 3 atoms involved in bonding:

1. Atom C with 4 valence electrons, requires 4 electrons to reach the octet

2. Atom O with 6 valence electrons, requires 2 electrons to reach the octet

3. Atom H with 1 valence electron, requires 1 electron to reach a duplet

In describing Lewis's structure the steps that can be taken are:

1. Count the number of valence electrons from atoms in a molecule

2. Give each bond a pair of electrons

3. The remaining electrons are given to the atomic terminal so that an octet is reached

4. The remaining electrons that still exist in the central atom

5. If the central atom is not yet octet, free electrons are drawn to the central atom to form double bonds

In the Butanal structure (C₄H₈O) there is 1 double bond of the functional group (-CHO) between the C atom and the O atom

<h3>Learn more: </h3>

Adding electron dots

brainly.com/question/6085185

Ionic bonding

brainly.com/question/1603987

Formal charge

brainly.com/question/7190235

Keywords: butanal, aldehyde, Lewis structure, a valence electron

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3 years ago

Read 2 more answers

What causes the lines in the spectrum for elements? a continuous release of energy from the heated element a quantum absorption

solmaris [256]

Answer:a quantum absorption of energy

Explanation:

Bohr’s model explains the spectral lines .While the electron of the atom remains in the ground state, its energy is unchanged. When the atom absorbs one or more quanta of energy, the electron moves from the ground state orbit to an excited state and when the atom relaxes back to a lower energy state, it releases energy that is again equal to the difference in energy of the two orbits.

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2 years ago

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PIT_PIT [208]

Answer:

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3 years ago