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1 year ago

Would calcium be considered a good conductor of electricity?

1 answer:

5 0

Calcium. This element is in the alkaline earth metals. As such, it could be a good conductor. This is because it can form metallic bonds.

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Which is a third stage of cellular respiration

xxTIMURxx [149]

There are 3 major stages in cellular respiration, glycolysis, Krebs cycle, and the electron transport chain.

6 0

3 years ago

Specify which atoms, if any, bear a formal charge in the Lewis structure given and the net charge for the species.

ozzi

Answer :

Formal charge on C: (-1)

Formal charge on N: (0)

Net charge: (-1)

Explanation :

First we have to determine the Lewis-dot structure of $CN^-$ .

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is, $CN^-$

As we know that carbon has '4' valence electrons and nitrogen has '5' valence electrons.

Therefore, the total number of valence electrons in $CN^-$ = 4 + 5 + 1= 10

According to Lewis-dot structure, there are 6 number of bonding electrons and 4 number of non-bonding electrons.

Now we have to determine the formal charge for each atom.

Formula for formal charge :

$\text{Formal charge}=\text{Valence electrons}-\text{Non-bonding electrons}-\frac{\text{Bonding electrons}}{2}$

$\text{Formal charge on C}=4-2-\frac{6}{2}=-1$

$\text{Formal charge on N}=5-2-\frac{6}{2}=0$

Net charge = -1 + 0 = -1

4 0

4 years ago

Carbon-14 naturally decay to carbon-_____. 13 12 10 15

lorasvet [3.4K]

Answer:

13 would be correct

Explanation:

4 0

3 years ago

Read 2 more answers

After 7.9 grams of sodium are dropped into a bathtub full of water how many grams of hydrogen gas are released

Nataliya [291]

Answer:

The grams of hydrogen gas that are released is 0.343 gram

Explanation:

Given that:

2 Na + 2h₂0 ⇒ 2Na0H +N₂

Molecules of Na = 7.9/2.3 = 0.343 mol Na

Now,

2 molecules of Na produces one mole h₂

0.343 mol of Na produce 0.343/2 = 0.1717 mol h₂

h2 = molecules * mw (molecular weight) =0.1717 * 2 =0.343 grams

Therefore the grams of hydrogen gas released is = 0.343 grams

6 0

4 years ago

How many molecules are in 4.0 moles of propane (C3H8)

Lapatulllka [165]

Answer:

2.408x10^24 molecules

Explanation:

1mole of a substance contains 6.02x10^23 molecules.

This means that 1mole of C3H8 contains 6.02x10^23 molecules.

Therefore, 4moles of C3H8 will contain = 4 x 6.02x10^23 = 2.408x10^24 molecules

5 0

3 years ago