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3 years ago

Consider these two entries from a fictional table of standard reduction potentials.

Chemistry

1 answer:

Vika [28.1K]3 years ago

8 0

Answer:

1.89 V

Explanation:

To calculate the standard cell potential, subtract the reduction potential of the anode from the reduction potential of the cathode.

So for your calculation,

-0.22 V - (-2.11 V)= 1.89 V

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Rank the following solutions in order of increasing acidity (least acidic to most acidic): I: [H3O+] = 1x10−5 II: [OH−] = 1x10−1

kozerog [31]

Answer: option C) II < III < I

i.e [OH−] < [H3O+] < I

Explanation:

First, obtain the pH value of I and II, then compare both with III.

For I

Recall that pH = -log (H+)

So pH3O = -log (H3O+)

= - log (1x10−5)

= 4

For II

pOH = - log(OH-)

= - log(1x10−10)

= 9

For III

pH = 6

Since, pH range from 1 to 14, with values below 7 to be acidic, 7 to be neutral, above 7 to be alkaline: then, 9 < 6 < 4

Thus, the following solutions from least acidic to most acidic is II < III < I

6 0

3 years ago

Howtocalculatethevolumeofcarbondioxideproducedwhen400gofmarblewereats.t.p

lys-0071 [83]

Answer:

so 0.15 moles X 22.4 dm3/mole=3.36 dm3. Next we find the moles of hexane combusted, and then the moles of CO2. Finally, we find the volume of CO2 using the fact that at STP, 1 mole of gas = 22.4 dm3.

3 0

3 years ago

#1: The average velocities of gas molecules in cylinders A, B, C, and D are 20 m/s, 50 m/s, 60 m/s, and 100 m/s, respectively. T

d1i1m1o1n [39]

Cylinder D
temperature is the measurement of average kinetic energy of a sunstance. since cylinder D has the highest average velocity, it has the highest average kinetic energy among the 4 cylinders, thus cylinder D is the hottest.

8 0

3 years ago

Which of the following has the correct name for either the acid or base

Vlad1618 [11]

Answer:

Explanation:

harmless

...............

6 0

3 years ago

Sodium chloride is produced from its elements

Kisachek [45]

Answer:

Mass of Sodium = 574.75 g

Mass of Chlorine = 886.25 g

Explanation:

The balance chemical equation for the synthesis of NaCl is,

2 Na + Cl₂ → 2 NaCl

Step 1: Find out moles of each reactant required,

According to balance chemical equation,

2 moles of NaCl is produced by = 2 moles of Na

So,

25 moles of NaCl will be produced by = X moles of Na

Solving for X,

X = 25 mol × 2 mol / 2 mol

X = 25 moles of Na

Similarly for Cl₂,

According to balance chemical equation,

2 moles of NaCl is produced by = 1 mole of Cl₂

So,

25 moles of NaCl will be produced by = X moles of Cl₂

Solving for X,

X = 25 mol × 1 mol / 2 mol

X = 12.5 moles of Cl₂

Step 2: Convert each moles to mass as;

Mass = Moles × Atomic Mass

For Na,

Mass = 25 mol × 22.99 g/mol

Mass = 574.75 g

For Cl₂,

Mass = 12.5 mol × 70.90 g/mol

Mass = 886.25 g

6 0

3 years ago