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3 years ago

What element has only two half-filled orbitals in the 3d sublevel?

2 answers:

7 0

It’s either Nickel or Titanium.
Ti ends in 3d2, 2 1/2filled d orbitals
Ni ends in 3d8, with the last 2 d orbitals being 1/2 filled
Ge and Si have full d orbitals

azamat3 years ago

4 0

I'm not sure, but I think its Vandium.

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An aerosol can with a temperature of 292 K and a pressure of 1.25 atm was left outside in the sun on a hot summer day. The press

garik1379 [7]

Answer:

310.69K

Explanation:

Given parameters:

Initial temperature T₁ = 292K

Initial pressure P₁ = 1.25atm

Final pressure P₂ = 1.33atm

Unknown:

Final temperature T₂ = ?

Solution

To find the unkown, we need to apply the combined gas law. From the combined gas law, it can be deduced that at constant volume, the pressure of a give mass or mole of gas varies directly with the absolute temperature.

Since the same aerosol can is heated, the volume is constant.

$\frac{P_{1} }{T_{1} }$ = $\frac{P_{2} }{T_{2} }$

Now, we have to make T₂ the subject of the formula:

T₂ = $\frac{P_{2} x T_{1} }{P_{1} }$

T₂ = $\frac{1.33 x 292 }{1.25 }$ = 310.69K

6 0

3 years ago

Calculate the molarity of solution of "sodium sulfate" that contains 5.2 grams sodiums sulfate diluted to 500mL

wlad13 [49]

Taking into account the definition of molarity, the molarity of solution of sodium sulfate is 0.0732 $\frac{moles}{liter}$ .

<h3>Definition of molarity</h3>

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

$Molarity=\frac{number of moles}{volume}$

Molarity is expressed in units $\frac{moles}{liter}$ .

<h3>Molarity of solution of sodium sulfate.</h3>

In this case, you have:

number of moles of sodium sulfate= $5.2 grams\frac{1 mole}{142 grams} = 0.0366 moles$ (being 142 g/mole the molar mass of sodiums sulfate)
volume= 500 mL= 0.5 L (being 1000 mL= 1 L)

Replacing in the definition of molarity:

$Molarity=\frac{0.0366 moles}{0.5 L}$

Solving:

Molarity= 0.0732 $\frac{moles}{liter}$

Finally, the molarity of solution of sodium sulfate is 0.0732 $\frac{moles}{liter}$ .

Learn more about molarity:

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3 0

2 years ago

Which statement describes carbohydrates?

DedPeter [7]

Answer:

B.)

Explanation:

4 0

3 years ago

Read 2 more answers

What is the molecular formula for a compound with a molar mass of 42.08g/mol and an empirical formula of ch2

yan [13]

Answer:

$C_3H_6$

Explanation:

Hello!

In this case, since the empirical formula is the smallest representation of the molecular formula, it is known that the times in which the empirical formula is into the molecular formula is a whole number and is computed by dividing the molar mass of the molecular formula by that of the empirical formula as shown below:

$\frac{42.08g/mol}{12.01+1.01x2}= \frac{42.08g/mol}{14.03g/mol}=3$

Thus, the molecular formula times the empirical formula by 3 to obtain:

$C_3H_6$

Regards!

3 0

2 years ago

Assuming ideal behavior, one mole krypton gas is released into flexible container at STP. What is the density of Krypton gas in

Allushta [10]

Answer:

C. 3.74 g/L

Explanation:

Using ideal gas equation as:

$PV=nRT$

where,

P is the pressure

V is the volume

n is the number of moles

T is the temperature

R is Gas constant having value = 0.0821 L.atm/K.mol

Also,

Moles = mass (m) / Molar mass (M)

Density (d) = Mass (m) / Volume (V)

So, the ideal gas equation can be written as:

$PM=dRt$

At STP,

Pressure = 1 atm

Temperature = 273.15 K

Molar mass of krypton gas = 83.8 g/mol

Applying the equation as:

1 atm × 83.8 g/mol = d × 0.0821 L.atm/K.mol × 273.15 K

⇒d = 3.74 g/L

4 0

3 years ago