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3 years ago

How are theres over 2,500 different minerals why?

1 answer:

5 0

A mineral occurs naturally, meaning that even though there are artificial substances that might be described as mineral-like they are not minerals

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Potassium chloride is used as a substitute for sodium chloride for individuals with high blood pressure. Identify the limiting r

djyliett [7]

Answer:

* Limiting reagent: potassium.

* $m_{Cl_2}^{excess}=2.47gCl_2$

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

$2K(s)+Cl_2(g)\rightarrow 2KCl$

In such a way, the reacting moles of chlorine are:

$n_{Cl_2}=7.00g*\frac{1molCl_2}{70.9gCl_2}=0.0987molCl_2$

Now, the amount of chlorine gas that would react with 5.00 g of potassium result:

$n_{Cl_2}^{consumed}=5.00g*\frac{1molK}{39.1gK}*\frac{1molCl_2}{2molK}=0.0639molCl_2$

Thus, the chlorine will be in excess and the potassium will be the limiting reagent. Therefore, the mass of excess chlorine turns out:

$m_{Cl_2}^{excess}=(0.0987-0.0639)molCl_2*\frac{70.9gCl_2}{1molCl_2}=2.47gCl_2$

Best regards.

4 0

3 years ago

The evaporation rate of chloroform (CHCl3) in air has been experimentally measured in an Arnold diffusion cell at 25°C and 1.00

Zanzabum

Answer:

1. C = 0.041 mol/L, 2. Mole Fraction = 0.2632, 3. N(A) = 9.322 x 10⁻⁵ mol/cm².s, 4. D(AB) = 5.688 x 10⁻⁵ cm²/s

Explanation:

Use the ideal gas equation

PV = nRT

Can be re4arranged as

P = nRT/V, where n/V = C

Hence

P = CRT

1. Concentration of air

C = P/RT

C = 101325/(8.314 x 298)

C = 40.89mol/m³ = 0.041 mol/L

2. Mole Fraction of chloroform in air at the liquid- air interface

Mole fraction = vapor pressure(chloroform)/vapor pressure(total)

Mole Fraction = 200/760 = 0.2632

3. Flux of chloroform

N(A) = (D(AB)//Z) . (P(T)/RT) .(P(A1) – P(A2))/P(BM)

P(BM) = (760 – 560)/ln(760/560) = 655 mm Hg

D(AB) = RTP(BM) (Z²₁ – Z²₀)/{2PM(A)(P(A1) – P(A2))}

D(AB) = 8.314 x 298 x 655 (0.0758² – 0.074²)/(2 x 101325 x 0.1195 x 200 x 36000)

D(AB) = 5.688 x 10⁴ = 5.688 x 10⁻⁵cm²/s (multiplying by 10⁴ to convert into cm2)

N(A) = (5.688 x 10⁻⁵)/(7.62) x (101325/8 .314 x 298) x (200/655)

N(A) = 9.322 x 10⁻⁵ mol/cm².s

4. D(AB) has already been calculated in the solution of 3

D(AB) = 5.688 x 10⁻⁵ cm²/s

5 0

3 years ago

What mass of silver has a volume of 105.0 cm^3? The density of silver is 10.50 g/cm^3

sammy [17]

Answer:

Explanation:

The density of a substance can be found by using the formula

$Density = \frac{mass}{volume}$

Making mass the subject we have

<h3>mass = Density × volume</h3>

From the question

Density of silver = 10.50 g/cm³

Volume = 105 cm³

Substitute the values into the above formula and solve for the mass

That's

mass = 10.5 × 105

We have the final answer as

mass = 1102.50 g

Hope this helps you

4 0

3 years ago

Help ASAP only right answers only no spam don’t answer if you don’t know

lorasvet [3.4K]

The answer is theory :))

4 0

2 years ago

How many protons does oxygen have?

Sidana [21]

Answer:

8 Protons

Explanation:

Oxygen is the 8th element in the periodic table. That means that oxygen has 8 protons and 8 electrons. To get the number of neutrons you take the atomic weight in this case 15.9999~16 and you subtract it by the number of protons.

3 0

3 years ago

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