Where do the nitrogen bases that are floating go

A heliox tank contains 32% helium and 68% oxygen. The total pressure in the tank is 475 kPa. What is the partial pressure of hel

Paladinen [302]

Answer:

152 kPa = Partial pressure O₂

Explanation:

Data by percent is the molar fraction . 100.

Molar fraction of Helium = 32/ 100 → 0.32

Molar fraction of O₂ = 68/100 → 0.68

Sum of molar fractions in a mixture = 1

0.68 + 0.32 = 1

If we apply the molar fraction, we can determine the partial pressure.

Mole fraction = Partial pressure / Total pressure

0.32 = Partial pressure O₂ / 475kPa → 0.32 . 475 kPa = Partial pressure O₂

152 kPa = Partial pressure O₂

8 0

3 years ago

The Group 8A(18) elements The Group 8A(18) elements are unreactive and are rarely found in combination with other elements. are

valentina_108 [34]

Answer: Option (a) is the correct answer.

Explanation:

It is known that elements which have completely filled octet when they are present in neutral state then they do not need to gain or lose an electron. Hence, the element becomes unreactive in nature.

For example, neon is a noble gas whose atomic number is 10 and its electronic distribution is 2, 8. As they have completely filled orbitals so they do not react with other elements.

As a result, they are rarely found in combination with other elements.

Thus, we can conclude that the Group 8A(18) elements are unreactive and are rarely found in combination with other elements.

5 0

3 years ago

Why do electrons keep moving around the nucleus and not away from the atom

igomit [66]

The atom's center, or nucleus, is positively charged and the electrons that whirl around this nucleus are negatively charged, so they attract each other. The reason the force is strong is because the atom is so small. The distance between the nucleus and the electrons is about 1 Angstrom (named after a famous scientist); this is 0.00000001 cm (10-8 cm) or about 4 billionths of an

7 0

3 years ago

Which elements are present in all organic compounds? 1. Hydrogen and oxygen 2. Nitrogen and Carbon 3. Nitrogen and oxygen 4. Hyd

cupoosta [38]

Answer:

my answer is num:3 Hydrogen and oxygen.

8 0

3 years ago

Check all the statements that are correct. Conservation of mass means:

Llana [10]

Conservation of mass means:

We must start and end with the same amount of matter

Matter cannot be created

<em>In a closed / isolated system, the total mass of the substance before the reaction will be equal to the total mass of the reaction product. </em>

<h3>Further explanation </h3>

In general, the reaction takes place in the open air. If the reaction results in the form of gas as in combustion, the mass of the reaction results will be smaller than the original mass. Or if the reaction binds to a larger than the environment then the reaction results will produce a greater mass than the original mass.

For example, in a paper combustion reaction the mass of combustion ash is smaller than the mass of paper that is burned because there is a gas released into the air

Conservation of mass applies to a closed system, where the masses before and after the reaction are the same

Let see the answer choices :