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Mariulka [41]
3 years ago
6

Of the three metals pb cu zn which is the most active

Chemistry
1 answer:
Paladinen [302]3 years ago
6 0
Zn is the most active of the three metals.
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Refer to a periodic table and tell how many helium atoms (He) would be needed to
marysya [2.9K]
About 4. the weight of He is about 4 amus and the weight of O is about 16 amus, so you would need 4 He atoms to get close to the same mass as an O atom. i hope this helps
6 0
3 years ago
1‑propanol ( nn ‑propanol) and 2‑propanol (isopropanol) form ideal solutions in all proportions. Calculate the partial pressure
likoan [24]

Answer:

Piso = 32.17 Torr

Pprop = 5.079 Torr

yprop = 0.1364

yiso = 0.8636

Explanation:

From the question; we can opine that :

  • The mole fraction of isopropanol in a mixture of isopropanol and propanol will be 1.
  • The partial pressure of isopropanol will be its mole fraction multiplied by vapor pressure of isopropanol
  • The partial pressure of propanol will be its mole fraction multiplied by vapor pressure of propanol
  • In the vapor, the mole fraction of propanol will be its partial pressure divided by the sum of the two partial pressures      

NOW;

When xprop = 0.243; xisopropanol will be 1- 0.243 = 0.757

P°iso = 45.2 Torr at 25 °C so

Piso will be 45.2 × 0.757 = 32.17 Torr

Pprop will be 20.9 × 0.243 = 5.079 Torr

yprop = 5.079/(5.079 +32.17) = 0.1364

yiso = 1-0.1364 = 0.8636

5 0
3 years ago
What is the redox reaction? And how does the redox reaction happen inside batteries?
Montano1993 [528]

Answer:

It is called a reduction-oxidation, oxide-reduction reaction, or simply as a redox reaction, any chemical reaction in which one or more electrons are transferred between the reactants

Redox battery is an example of both a Flow Battery and a two electrolyte system.In this case, it depends on two different active aqueous electrolytes of vanadium dissolved in sulfuric acid separated by a membrane at which ionic interchange takes place.

Thats my opinión though.

5 0
3 years ago
Based on the information above, what is average speed of the toy car?
navik [9.2K]

The average speed of the toy car : 0.2 m/s

<h3>Further explanation</h3>

Given

The motion of a toy car

Required

The average speed

Solution

Average speed = total distance/total amount of time ,

From the graph :

Total distance travelled : 4

Total time : 20 s

The average speed = total distance (d) : total time (s)

The avg speed = 4 : 20

The avg speed = 0.2 m/s

3 0
3 years ago
The periodic table is an arrangement of the chemical elements, ordered by atomic number, into families, and by doing so illustra
Ivanshal [37]

Answer:

A

Explanation:

7 0
3 years ago
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