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OLga [1]
3 years ago
7

9. Which of Earth’s sphere consists of all living things? A. hydrosphere B. geosphere C. biosphere

Chemistry
1 answer:
Anna007 [38]3 years ago
3 0

Answer:

i think its b

Explanation:

i took it

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If a mixture of gases contained 78% nitrogen at a pressure of and 22% carbon dioxide at , what is the total pressure of the syst
Naddika [18.5K]
The pressures given are the partical pressures of the two gases.

The law of Dalton or of the partial pressures states that the total pressure of a mixture of gases is equal to the sum of the pressures of all the gases.

So, in this case:

Total pressure = pressure of nitrogen + pressure of carbon dioxyde.

Of course both terms must be in the same units.

i have found that the pressures for this problem are:

Pressure of nitrogen = 984 torr

Pressure of carbon dioxyde = 345 torr

Total pressure = 984 torr + 345 torr = 1329 torr.

Now convert to atm: 1 atm = 760 torr

=> 1329 torr * 1 atm / 760 torr = 1.74868 atm ≈ 1.75 atm

Answer: 1.75 atm

4 0
4 years ago
What is the maximum value of the secondary quantum number (l) allowed for atomic electrons with a principal quantum number n = 7
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Explanation:

Principal quantum number=n=7

Azimuthal quantum number=l:-

\\ \sf\longmapsto n-1

\\ \sf\longmapsto 7-1

\\ \sf\longmapsto \ell=6

3 0
3 years ago
Which is an example of an atom?
shutvik [7]
The smallest unit of Ne (Neon)
8 0
3 years ago
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What are three ways fluid flow is important in the food industry?
yarga [219]
Viscosity measurements are used in the food industry to maximize production efficiency and cost effectiveness. It affects the rate at which a product travels through a pipe, how long it takes to set or dry, and the time it takes to dispense the fluid into packaging.
8 0
3 years ago
An energy profile for the reaction A⇌B (left), and the change in concentration of B as a function of time (right), with and with
RoseWind [281]

Answer:

<em>What quantity dictates the speed of a reaction?</em> The activation energy

Explanation:

According to the collision theory, when molecules collide, they must overcome an energy barrier for the reaction to take place. This energy, known as activation energy, is represented by the difference in energy between the initial state and the transition state. The higher the activation energy, the slower the reaction. That's why catalysts reduce the activation energy to accelerate the reaction.

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