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3 years ago

13

In the paleoatmosphere, the primary gases were _____. a) oxygen, carbon dioxide, nitrogen b) carbon dioxide, nitrogen, and water

vapor c) oxygen and water vapor d) carbon dioxide and oxygen

1 answer:

natali 33 [55]3 years ago

5 0

Answer: Option A. oxygen, carbon dioxide, nitrogen

Explanation:

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A 17.4 L sample of oxygen gas (O2) was collected at a temperature of 23.0°C and a pressure of 2.18 atmospheres. What volume woul

timofeeve [1]

The volume of the gas at STP = 35.01 L

<h3>Further explanation</h3>

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure).

In general, the gas equation can be written

$\large {\boxed {\bold {PV = nRT}}}$

where

P = pressure, atm

V = volume, liter

n = number of moles

R = gas constant = 0.08206 L.atm / mol K

T = temperature, Kelvin

V=17.4 L

T = 23 + 273 = 296 K

P = 2.18 atm

$\tt mol=n=\dfrac{PV}{RT}\\\\n=\dfrac{2.18\times 17.4}{0.082\times 296}\\\\n=1.563$

The volume of the gas occupy at STP :

$\tt 1.563\times 22.4=35.01~L$

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3 years ago

Review the map that shows earthquake zones as yellow lines and active volcanoes as red dots. what pattern can you determine abou

aleksandr82 [10.1K]

A map that shows the location of volcanoes is called a Geologic Map. This kind of map contains information about the geological history and condition of volcanic sites.

<h3>What do Geologic Maps indicate?</h3>

Geologic maps indicate the following:

the location of volcanos
age of rock deposits found near the volcano
which volcanoes are active and those that aren't
types of rocks at these sites
faults fracture etc.

Note that the map specific to the question is unavailable hence the general response.

Learn more about geologic maps at:

brainly.com/question/2773541

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2 years ago

The Ksp of calcium sulfate, CaSO4, is 9.0 × 10-6. What is the concentration of CaSO4 in a saturated solution? A. 3.0 × 10-3 Mola

Svet_ta [14]

Answer: The concentration of $CaSO_4$ in a saturated solution is $3.0\times 10^{-3}M$

Explanation:

Solubility product is defined as the equilibrium constant in which a solid ionic compound is dissolved to produce its ions in solution. It is represented as $K_{sp}$

The equation for the ionization of $CaSO_4$ is given as:

$K_{sp}$ of $CaSO_4$ = $9.0\times 10^{-6}$

By stoichiometry of the reaction:

1 mole of $CaSO_4$ gives 1 mole of $Ca^{2+}$ and 1 mole of $SO_4^{2-}$

When the solubility of $CaSO_4$ is S moles/liter, then the solubility of $Ca^{2+}$ will be S moles\liter and solubility of $SO_4^{2-}$ will be S moles/liter.

$K_{sp}=[Ca^{2+}][SO_4^{2-}]$

$9.0\times 10^{-6}=[s][s]$

$9.0\times 10^{-6}=s^2$

$s=3.0\times 10^{-3}M$

Thus concentration of $CaSO_4$ in a saturated solution is $3.0\times 10^{-3}M$

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3 years ago

What is 5 time 25 . .

daser333 [38]

One Hundred and twenty-five

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3 years ago

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Darwin told us that science:<br> saves lives

11111nata11111 [884]

Answer:yup!!

Explanation:

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3 years ago