A lab assistant reacts ammonia and nitric acid what is the percent yield

. Arrange the following in order of increasing radius:

Anton [14]

Answer:

d

Explanation:

because nuclear charge ( no. of protons) increases

7 0

3 years ago

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.

Answer: The value of equilibrium constant for the reaction is 2448.1

Explanation:

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

The vapor pressure of water at 50.0 c is 12.33 kpa. What is this value in millimeters of mercury?

kramer

Answer:

92.48 mmHg

Explanation:

You need the conversion factor to convert the value of 12.33 kPa to milimiters of mercury, mmHg.

The converstion factors are looked at tables, which today you can find in internet.

Since the conversions between kPa and atm and between atm and mmHg are more widely known, I will show the conversion using those relations:

1 atm = 101.325 kPa

1 atm = 760 mmHg

⇒ 101.325 kPa = 760 mmHg

Then, dividing both sides by 101.325 kPa you get the conversion factor:

1 = 760 mmHg / 101.325 kPa

Now, multiply 12.33 kPa by that conversion factor:

12.33 kPa × 760 mmHg / 101.325 kPa = 92.48 mmHg ← answer

6 0

3 years ago

Minerals are only used for gemstones and jewelry. True False

adelina 88 [10]

Answer:

false

Explanation:

the answer is false because there is minerals in our water, ect.

6 0

3 years ago

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The specific heat of nickel is 0.44 J/g*⁰C. How much energy needed to change the temperature of 95.4g of nickel from 22⁰C to 32⁰

valentinak56 [21]

To determine the heat or energy needed for the process, we use the equation,
H = mcpdT
where m is the mass, cp is the specific heat and dT is the temperature difference.
H = (95.4g)(0.44 J/g°C)(32°C - 22°C)
= 419.76 J
Thus, the amount of heat that should be ABSORBED is approximately 419.76 J.

8 0

3 years ago

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