A vehicle travels 2345 meter in 35 second toward the evening sun in the West. What is its speed? A. 47 m/s West

How many atoms are in .47 moles of argon

lesantik [10]

Answer:

$\large \boxed {2.8 \times 10^{23}\text{ atoms Ar}}$

Explanation:

$\text{Atoms of Ar} = \text{0.47 mol Ar} \times \dfrac{ 6.022 \times 10^{23}\text{ atoms Ar}}{\text{1 mol Ar}}\\\\= \large \boxed {\mathbf{2.8 \times 10^{23}}\textbf{ atoms Ar}}$

3 0

3 years ago

Below are 5 sets of potential solutes for you to compare. Both members of each pair are very soluble in water. If you had equal

Gelneren [198K]

Answer:

Option D. AlCl₃, MgC₂

Explanation:

We need to dissociate all the salts, to determine the i. (Van't Hoff factor).

The salt who has the highest value, will be the better conductor of electricity

CsCl → Cs⁺ + Cl⁻ i = 2

CaCl → Ca²⁺ + Cl⁻ i = 2

CaS → Ca²⁺ + S⁻² i = 2

Li₂S → 2Li⁺ + S⁻² i = 3

KBr → K⁺ + Br⁻ i = 2

AlCl₃ → Al³⁺ + 3Cl⁻ i = 4

MgC₂ → Mg²⁺ + 2C⁻ i = 3

KI → K⁺ + I⁻ i = 2

K₂S → 2K⁺ + S⁻² i = 3

The biggest i, is in pair D.

6 0

4 years ago

A mixture of gases with a pressure of 800.0 mm hg contains 60% nitrogen and 40% oxygen by volume. What is the partial pressure o

larisa86 [58]

Answer:

The partial pressure of oxygen in the mixture is 320.0 mm Hg

Explanation:

1) Take a base of 100 liters of mixture:

N: 60% × 100 liter = 60 liter

O: 40 % × 100 liter = 40 liter.

2) Volume fraction:

At constant pressure and temperature, the volume of a gas is proportional to the number of molecules.

Then, the mole ratio is equal to the volume ratio. Callin n₁ and n₂, the number of moles of nitrogen and oxygen, respectively, and V₁, V₂ the volume of the respective gases you can set the proportion:

V₁ / V₂ = n₁ / n₂

That means that the mole ratio is equal to the volume ratio, and the mole fraction is equal to the volume fraction.

Then, since the law of partial pressures of gases states that the partial pressure of each gas is equal to the mole fraction of the gas multiplied by the total pressure, you can draw the conclusion that the partial pressure of each gas is equal to the volume fraction of the gas in the mixture multiplied by the total pressure.

Then calculate the volume fractions:

Volume fraction of a gas = volume of the gas / volume of the mixture

N: 60 liter / 100 liter = 0.6 liter

V: 40 liter / 100 liter = 0.4 liter

3) Partial pressures:

These are the final calculations and results:

Partial pressure = volume fraction × total pressure

Partial pressure of N = 0.6 × 800.0 mm Hg = 480.0 mm Hg

Partial pressure of O = 0.4 × 800.0 mm Hg = 320.0 mm Hg

8 0

3 years ago

hydrogen combines with sulfur much like hydrogen combines with oxygen draw an electron dot diagram showing hydrogen combined wit

sertanlavr [38]

hydrogen combines with sulfur is H2S

hydrogen combines with oxygen H2O Hydrogen sulfide is the chemical compound with the formula H
2S. It is a colorless gas with the characteristic foul odor of rotten eggs; it is heavier than air, very poisonous, corrosive, flammable, and explosive; properties shared with the denser hydrogen chalcogenides

6 0

3 years ago

What’s a simple machine

saul85 [17]

Any of the basic mechanical devices for applying a force, such as an inclined plane, wedge, or lever.

8 0

3 years ago