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3 years ago

How does elevation affect the amount of air pressure?”.

Chemistry

1 answer:

Reika [66]3 years ago

5 0

Answer:

Altitude is related to air pressure. As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level. This is what meteorologists and mountaineers mean by "thin air." Thin air exerts less pressure than air at a lower altitude.

Explanation:

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When designing an experiment, the first step is to. ______. Group of answer choices a. hypothesis b. list a procedure c. state t

True [87]

Answer:

Explanation:

It's the scientific method

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3 years ago

Four most common oxyanions of Iodine

nikitadnepr [17]

HIO= Hypoiodous acid; IO-=Hypoiodite
HIO2= Iodous acid; IO2= iodite
HIO3=Iodic acid; IO3-= iodate
HIO4=Periodic acid; IO4-=Periodate

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2 years ago

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Problem PageQuestion Sulfuric acid is essential to dozens of important industries from steelmaking to plastics and pharmaceutica

Feliz [49]

The question is incomplete, here is the complete question:

Sulfuric acid is essential to dozens of important industries from steel making to plastics and pharmaceuticals. More sulfuric acid is made than any other industrial chemical, and world production exceeds 2.0×10¹¹ kg per year.

The first step in the synthesis of sulfuric acid is usually burning solid sulfur to make sulfur dioxide gas. Suppose an engineer studying this reaction introduces 1.8 kg of solid sulfur and 10.0 atm of oxygen gas at 650°C into an evacuated 50.0 L tank. The engineer believes Kp = 0.099 for the reaction at this temperature.

Calculate the mass of solid sulfur he expects to be consumed when the reaction reaches equilibrium. Round your answer to 2 significant digits.

Answer: The mass of solid sulfur that will be consumed is 19. grams

Explanation:

The chemical equation for the formation of sulfur dioxide gas follows:

$S(s)+O_2\rightarrow SO_2(g)$

Initial: 10.0

At eqllm: 10-x x

The expression of $K_p$ for above equation follows:

$K_p=\frac{p_{SO_2}}{p_{O_2}}$

We are given:

$K_p=0.099$

Putting values in above expression, we get:

$0.099=\frac{x}{10-x}\\\\x=0.901atm$

Partial pressure of sulfur dioxide = x = 0.901 atm

To calculate the number of moles, we use the equation given by ideal gas which follows:

$PV=nRT$

where,

P = pressure of the sulfur dioxide gas = 0.901 atm

V = Volume of the gas = 50.0 L

T = Temperature of the gas = $650^oC=[650+273]K=923K$

R = Gas constant = $0.0821\text{ L. atm }mol^{-1}K^{-1}$

n = number of moles of sulfur dioxide gas = ?

Putting values in above equation, we get:

$0.901atm\times 50.0L=n\times 0.0821\text{ L. atm}mol^{-1}K^{-1}\times 923K\\\\n=\frac{0.901\times 50.0}{0.0821\times 923}=0.594mol$

By stoichiometry of the reaction:

1 mole of sulfur dioxide gas is produced from 1 mole of sulfur

So, 0.594 moles of sulfur dioxide gas will be produced from = $\frac{1}{1}\times 0.594=0.594mol$ of sulfur

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Moles of sulfur = 0.594 moles

Molar mass of sulfur = 32 g/mol

Putting values in above equation, we get:

$0.594mol=\frac{\text{Mass of sulfur}}{32g/mol}\\\\\text{Mass of sulfur}=(0.594mol\times 32g/mol)=19.008g$

Hence, the mass of solid sulfur that will be consumed is 19. grams

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3 years ago

what symbol would be included in the noble gas notation for an element that had valence electrons in the 5s sub shell

horsena [70]

Answer:

The answer is Kr (Krypton).

This is because krypton has an electronic configuration of:

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6

Taking note of the sequence of electronic configuration:

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s

It can be seen that Kyrpton's electronic configuration finishes just before the 5s subshell. Therefore, the noble gas notation for an element with valence electrons in the 5s subshell can use [Kr] as a shortcut to denote its electronic configuration. For example:

If an element has 1 valence electron in the 5s subshell, the noble gas notation will be:

[Kr] 5s1

Explanation:

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3 years ago

The brightness of a star is determined by _____.

d1i1m1o1n [39]

Answer:

Distance from the earth

Explanation: Trust me we just did this and I got 100 percent on all of it.

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3 years ago

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