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3 years ago

If the pOH of a solution is 9.1, what is the concentration of OH- ions in that solution?

Chemistry

1 answer:

Amiraneli [1.4K]3 years ago

4 0

Answer:

7.9432*10^-10 or 10^-9.1

Explanation:

pOH=-log[OH]

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What did aristotle believe about the nature of matter

Murrr4er [49]

Answer:

Aristotle believes that all material substances are matter and form.

Explanation:

If you remember from the four causes, the matter is one cause and form is another cause. Substance theory says that substances are the ultimate things in the universe

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3 years ago

Derek lives in a hot, humid climate. He has two rose bushes in pots in his yard. The rose bushes grow quickly and bloom with lar

nikitadnepr [17]

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3 years ago

What is the limiting reactant when 8.4 moles of lithium react with 4.6 moles of oxygen gas?

serious [3.7K]

Answer: Lithium

Explanation: The balanced chemical equation is:

$4Li+O_2\rightarrow 2Li_2O$

It can be seen, 4 moles of lithium combines with 1 mole of oxygen gas to produce 2 moles of lithium oxide.

Thus 8.4 moles of lithium combines with= $\frac{1}{4}\times {8.4}=2.1moles$ of oxygen gas to produce 4.2 moles of lithium oxide.

As, Lithium limits the formation of product, it is the limiting reagent and Oxygen gas is present in excess, it is called the excess reagent. (4.6-2.1)=2.5 moles of oxygen gas are present in excess.

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3 years ago

Read 2 more answers

How many grams of He are necessary to fill a balloon having a volume of 4.50 × 10^{3} mL to a pressure of 1.14 × 10^{3} torr at

lana [24]

The mass in grams of He are necessary to fill a balloon having a volume of 4.50×10³ mL to a pressure of 1.14×10³ torr at 25.0ºC is 1.104 grams.

<h3>How do we calculate the grams from moles?</h3>

Mass (W) in grams from moles (n) will be calculated by using the below equation:
n = W/M, where

M = molar mass

Moles of helium gas will be calculated by using the ideal gas equation:

PV = nRT, where

R = universal gas constant = 62.363 L.torr / K.mol

P = pressure of gas = 1.14×10³ torr

V = volume of gas = 4.50×10³ mL = 4.50 L

n = moles of gas = ?

T = temperature = 25.0ºC = 298 K

On putting these values on the ideal gas equation, we get

n = (1140)(4.5) / (62.363)(298) = 5130 / 18584

n = 0.276 moles

Now we convert this moles into mass by using the first equation as:

W = (0.276mol)(4g/mol) = 1.104 g

Hence required mass of helium gas is 1.104 grams.

To know more about ideal gas equation, visit the below link:

brainly.com/question/12873752

#SPJ1

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2 years ago

Water interacts with polar substances like –OH groups but not with non-polar substances like methyl (-CH3) or ethyl groups (-CH2

Otrada [13]

To answer this, we look at the polarities of these molecules given. A molecule is said to be polar when there is an unequal shraing of electrons the opposite is called nonpolar.
CH4 = nonpolar
CH3OH = polar
CH3 CH3 = nonpolar
CH3 CH2 CH2 OH = polar
<span>CH3 CH2 CH2 CH2 CH2 CH3 = nonpolar</span>

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3 years ago