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natulia [17]
4 years ago
9

How many liters of space will 7.80 moles of methane gas (CH4) occupy at STP

Chemistry
1 answer:
Alchen [17]4 years ago
4 0

Answer:

V CH4(g) = 190.6 L

Explanation:

assuming ideal gas:

  • PV = RTn

∴ STP: T =298 K and P = 1 atm

∴ R = 0.082 atm.L/K.mol

∴ moles (n) = 7.80 mol CH4(g)

∴ Volume CH4(g) = ?

⇒ V = RTn/P

⇒ V CH4(g) = ((0.082 atm.L/K.mol)×(298 K)×(7.80 mol)) / (1 atm)

⇒ V CH4(g) = 190.6 L

You might be interested in
What is an alkali metal with fewer than 10 protons in its nucleus?
Trava [24]

Answer:

            Lithium

Explanation:

                  Alkali metals are group of metals which are present in first group of periodic table. As we know atomic number is equal to number of protons contained by a particular element. Therefore, the alkali metals along with there number of protons are listed below;

Alkali Metal                                         Number of Protons

Lithium                                                               3

Sodium                                                             11

Potassium                                                         19

Rubidium                                                         37

Cesium                                                             55

Francium                                                          87

Hence, it is cleared from above table that Lithium is having fewer protons than 10.

6 0
3 years ago
Mg(OH)2 is a sparingly soluble salt with a solubility product, Ksp, of 5.61×10−11. It is used to control the pH and provide nutr
Solnce55 [7]

Answer:

The ration of the molar solubility is 165068.49.

Explanation:

The solubility reaction of the magnesium hydroxide in the pure water is as follows.

Mg(OH)_{2}\Leftrightarrow Mg^{2+}(aq)+2(OH)^{-}(aq)

              [Mg^{2+}][OH^{-}]

Initial      0          0

Equili     +S       +2S

Final      S          2S

K_{sp}=[Mg^{2+}][OH^{-}]

5.61\times 10^{-11}=(S)(2S)^{2}

S=(\frac{5.61\times 10^{-11}}{4})^{1/3}=2.41\times 10^{-4}M

Solubility of Mg(OH)_{2} in 0.180 M NaOH is a follows.

Mg(OH)_{2}\Leftrightarrow Mg^{2+}(aq)+2(OH)^{-}(aq)

              [Mg^{2+}][OH^{-}]

Initial      0          0

Equili     +S       +2S

Final      S          2S+0.180M

K_{sp}=[Mg^{2+}][OH^{-}]

5.61\times 10^{-11}=(S)(2S+0.180)^{2}

S=1.46\times 10^{-9}M

Ratio\,of\,solubility=\frac{2.41\times 10^{-4}}{1.46\times 10^{-9}}=165068.49

Therefore, The ration of the molar solubility is 165068.49.

4 0
3 years ago
What is the mass of an object if force of -136 n can make it accelerate at -9.6 m/s^2
vampirchik [111]

The answer for the following problem is mentioned below.

  • <em><u>Therefore the mass of an object is 14.16 grams.</u></em>

Explanation:

Force:

The push or pull on an object with mass that cause change in the velocity

It is a vector quantity.

The formula to calculate the force is:

F = m × a

Given:

Force (F) = -136 N

acceleration (a) = -9.6 m/s^2

To calculate:

mass of the object (m)

We know that,

<em>F = m × a</em>

where,

F represents the force of the object

m represents mass of an object

a is acceleration of an object

From the equation;

-136 = m × -9.6

m = \frac{-136}{-9.6}

m = 14.16 grams

<em><u>Therefore the mass of an object is 14.16 grams.</u></em>

3 0
4 years ago
Convert 145 meters to kilometers.
Sphinxa [80]

Divide by 1000

145÷1000=0.145

Hope this will be helpful.

4 0
1 year ago
A 100 kg tree gets struck by lightning and is burned completely to ash. A scientist gathers up all the ash and weighs it to find
Oksi-84 [34.3K]

Answer:

Evaporated via combustion.

Explanation:

The loss on ignition (LOI) and Ash content are inorganic analytical techniques used to determine the percentage by mass of hydrocarbon in compounds. This process allows volatile matter and possibly impurities found in a material to evaporate, leaving behind the true chemical constituents of the material.

The 10kg lost could be moisture content of the tree, or other volatile matter which has escaped on combustion of the tree.

6 0
3 years ago
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