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3 years ago

10

Determine the pH of 0.150 M KOH

1 answer:

Veronika [31]3 years ago

8 0

Answer:

pH=12.88 i believe that's the answer

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What happens when an acid reacts with a metal such as magnesium?

Kisachek [45]

Given that the metal is reactive, like magnesium is, the ions of the metal displace the hydrogen ions released by the acid and the metal ions combine with the acid's anions, forming a salt. The displaced hydrogen ions are released in the form of hydrogen gas. The reaction equation is as follows:
Acid + metal → salt + hydrogen gas

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3 years ago

• How do you change from one unit to another? Be prepared to work a problem or two

alexira [117]

1. write the conversion as a fraction (that equals 1)
2. Multiply it out (leaving all units in the answer)
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4 years ago

Calculate AGrxn for this equation, rounding your

Agata [3.3K]

Answer: $\Delta G_{rxn}=130.19J$

Explanation:

The balanced chemical reaction is,

$CaCO_3(s)\rightarrow CaO(s)+CO_2(g)$

The expression for Gibbs free energy change is,

$\Delta G_{rxn}=\sum [n\times \Delta G_(product)]-\sum [n\times \Delta G_(reactant)]$

$\Delta G_{rxn}=[(n_{CO_2}\times \Delta G_{CO_2})+(n_{CaO}\times \Delta G_{CaO})]-[(n_{CaCO_3}\times \Delta G_{CaCO_3})]$

where,

n = number of moles

Now put all the given values in this expression, we get

$\Delta G_{rxn}=[(1\times -394.4)+(1\times -604.17)]-[(1\times -1128.76)]$

$\Delta G_{rxn}=130.19J$

Therefore, the gibbs free energy for this reaction is, +130.19 kJ

4 0

3 years ago

Which one of the following types of rock would weather the fastest

Arte-miy333 [17]

The small pieces of clay will be the one which likely erodes quickest.

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3 years ago

A process stream contains 450 mol/s benzene and 375 mol/s toluene. Calculate the mole fraction of benzene in the process stream.

Tema [17]

Answer:

0.5455

Explanation:

The moles of benzene in the process stream in 1 sec = 450 moles

The moles of toluene in the process stream in 1 sec = 375 moles

So, according to definition of mole fraction:

$Mole\ fraction\ of\ benzene=\frac {n_{benzene}}{n_{benzene}+n_{toluene}}$

Applying values as:

$Mole\ fraction\ of\ benzene=\frac {450}{450+375}$

<u>Mole fraction of benzene in the process stream = 0.5455</u>

7 0

4 years ago