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Marysya12 [62]
3 years ago
8

A coordination complex is made up of _________________________________________. (Choose one) Selected Answer: IncorrectC. a tran

sition metal center and alkaline earth metal ligands surrounding it. Answers: CorrectA. a Lewis acidic metal center with Lewis basic ligands surrounding it. B. an Arrhenius basic metal center with Lewis acidic ligands surrounding it. C. a transition metal center and alkaline earth metal ligands surrounding it. D. a Lewis basic metal center with Lewis acidic ligands surrounding it.
Chemistry
1 answer:
ycow [4]3 years ago
3 0

Answer:

a Lewis acidic metal center with Lewis basic ligands surrounding it.

Explanation:

A lewis acid is a chemical specie capable of accepting a lone pair of electrons while a lewis base is a chemical specie capable of donating a lone pair of electrons.

In a coordination compound, a lewis acid(central metal atom/ion) accepts electron pairs from lewis bases (ligands). Any chemical specie called a ligand must possess at least one electron pair available for coordinate covalent bonding.

Coordination compounds are usually formed between transition metal atoms/ions and neutral molecules having lone pairs of electrons or anionc species .

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What a piece of metal is left out in the weather for a long time it begin to rush just like an old car the rust we see is iron a
aleksklad [387]

Answer:

Iron w/Zinc. Metals react in weather of any type…and it is chemists job to try to figure out how to slow that process down. Zinc is a metal that is often coated on top of steel which is called galvanizing the steel, or “Galvanized Steel.” This process will help to slow down the rust as the zinc acts as an additional barrier to the air and moisture getting to the steel/iron.

Explanation:

3 0
3 years ago
Read 2 more answers
Nickel and carbon monoxide react to form nickel carbonyl, like this: (s)(g)(g) At a certain temperature, a chemist finds that a
horsena [70]

The question is incomplete, here is the complete question:

Nickel and carbon monoxide react to form nickel carbonyl, like this:

Ni(s)+4CO(g)\rightarrow Ni(CO)_4(g)

At a certain temperature, a chemist finds that a 2.6 L reaction vessel containing a mixture of nickel, carbon monoxide, and nickel carbonyl at equilibrium has the following composition:

Compound            Amount

     Ni                        12.7 g

   CO                        1.98 g

Ni(CO)_4                  0.597 g

Calculate the value of the equilibrium constant.

<u>Answer:</u> The value of equilibrium constant for the reaction is 2448.1

<u>Explanation:</u>

We are given:

Mass of nickel = 12.7 g

Mass of CO = 1.98 g

Mass of Ni(CO)_4 = 0.597 g

Volume of container = 2.6 L

To calculate the number of moles for given molarity, we use the equation:

\text{Molarity of the solution}=\frac{\text{Given mass of solute}}{\text{Molar mass of solute}\times \text{Volume of solution (in L)}}

\text{Equilibrium concentration of nickel}=\frac{12.7}{58.7\times 2.6}=0.083M

\text{Equilibrium concentration of CO}=\frac{1.98}{28\times 2.6}=0.0272M

\text{Equilibrium concentration of }Ni(CO)_4=\frac{0.597}{170.73\times 2.6}=0.00134M

For the given chemical reaction:

Ni(s)+4CO(g)\rightarrow Ni(CO)_4(g)

The expression of equilibrium constant for the reaction:

K_{eq}=\frac{[Ni(CO)_4]}{[CO]^4}

Concentrations of pure solids and pure liquids are taken as 1 in equilibrium constant expression.

Putting values in above expression, we get:

K_{eq}=\frac{0.00134}{(0.0272)^4}\\\\K_{eq}=2448.1

Hence, the value of equilibrium constant for the reaction is 2448.1

4 0
4 years ago
In the Penny Lab that we ran, what is the independent variable? Question 1 options: the soap the number of water drops the penny
motikmotik

Answer:

I'd say it's the number of water drops.

Explanation:

The number of water drops is what you're controlling or purposely controlling and that answer choice makes the most sense out of the other answer choices. So I'd say it's "The Number of Water Drops."

8 0
3 years ago
5.77 g of nitrogen react with excess hydrogen producing 6.83 g of ammonia what is the percent yield. Determine/Label the actual
nata0808 [166]

Answer:

Percentage yield is 41.21%

Explanation:

Equation of reaction,

N₂ + 3H₂ → 2NH₃

Actual NH3 = 6.83g

Mass of N2 = 5.77g

Theoretical yield = ?

5.77g of N2 = 6.83g of NH3

14g of N2 = xg

X = (14 × 6.83) / 5.77

X = 95.62 / 5.77

X = 16.57g of NH3

Theoretical yield of NH3 is 16.57g

Percentage yield = (actual yield / theoretical yield) × 100

% yield = (6.83 / 16.57) × 100

% yield = 0.4121 × 100

% yield = 41.21%

The percentage yield of NH3 is 41.21%

6 0
3 years ago
Isotopes of the same element have different
Nana76 [90]
Isotopes of the same element have different mass numbers.

C. mass numbers.


one mole of copper has 6.02 x 10²³ atoms

C. 6.02 * 10²³ atoms.
5 0
3 years ago
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