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erik [133]
3 years ago
7

When heated to 700–800 °c, diamonds, which are pure carbon, are oxidized by atmospheric oxygen. (they burn!) write the balanced

equation for this reaction?
Chemistry
1 answer:
Varvara68 [4.7K]3 years ago
7 0
Hello!

The balanced chemical equation for the oxidation of diamonds is the following one:

C(s) + O₂(g) → CO₂(g)

As simple as that! You see, Diamonds are an allotropic form of pure carbon. Allotropic forms are different arrangements of atoms. In graphite, the C atoms are arranged in layers like paper sheets, and in diamond, the C atoms are arranged in a tetrahedral structure, which gives them their hardness and their thermal and electrical properties. Burning diamonds would be the same as burning elemental carbon and the chemical equation is the one shown before. 

Have a nice day!
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Please help i dont understand it
Setler [38]

Answer:-  solution boiling point = 102.23 degree C (102 degree C with three sig figs).

Solution:- When a non volatile solute is added to a solvent then boiling point increases. Elevation in boiling point is directly proportional to the molality of the solution.

The equation is:

\Delta T_b=i*k_b*m

where, \Delta T_b is the elevation in boiling point, i is the Van't hoff factor, k_b is the molal elevation constant and m is the molality.

Value of i is 1 as ethylene glycol is a covalent molecule that does not break to give ions. k_b for water is \frac{0.512^0C}{m} .

We can calculate the molality from the given grams of ethylene glycol and liters of water as molality is moles of solute per kg of solvent.

Molar mass of ethylene glycol is 62 gram per mol and density of water is 1.00 kg per liter.

2.50L(\frac{1kg}{1L})

= 2.50 kg

Let's calculate the moles of ethylene glycol.

675g(\frac{1mol}{62g})

= 10.9 mol

molality of the solution = \frac{10.9mol}{2.50kg}

= 4.36m

Let's plug in the values in the equation we have on the top for elevation in boiling point.

\Delta T_b=4.36m(\frac{0.512^0C}{m})

= 2.23^0C

Boiling point of pure water is 100 degree C. So, the boiling point of the solution = 100 + 2.23 = 102.23 degree C

(If we fix the three sig figs then it could be written as 102 degree C.)

4 0
2 years ago
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What is the temperature of a 100 liter container having 1 mole of an ideal gas at a pressure of 20 kilopascals? (Given: R = 8.31
Shalnov [3]
For this case, we use the equation for an ideal gas which is expressed as PV=nRT where P is the pressure, V is the volume, n is the number of moles and T is the temperature. We calculate as follows:

PV = nRT
T = PV / nR
T = 20 kPa (100 L) / 1 mol (8.314) 
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6 0
2 years ago
4. Froath floatation process is used for*
lbvjy [14]

Answer:

Explanation:

Froath flotaion process is based on thie wttebality properteis like hydrophillicity and hydrophobicity.

Incase of sulphide ore processing,

The metallic sulphide particles of ore are preferentially wetted by oil and the gangue particles by water. By doing thise you are sperating required sulphide ore particels from unwanted gaunge , by doing this you are incresing the concentation of Sulfide in ore by removing the not required gaunge particles.

Hope this helps you to decide your annswer

5 0
3 years ago
Why is an MRI is useful for diagnosing cancer but ineffective in treating it?
LekaFEV [45]
Bc an MRI is just a scanner it's not and never will be meant for treatment 
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3 years ago
Write the cell notation for an electrochemical cell consisting of an anode where Mn (s) is oxidized to Mn2 (aq) and a cathode wh
morpeh [17]

Answer:

Mn(s)/Mn^2+(aq)//Co^2+(aq)/Co(s)

Explanation:

In writing the cell notation for an electrochemical cell, the anode is written on the left hand side while the cathode is written on the right hand side. The two half cells are separated by two thick lines which represents the salt bridge.

For the cell discussed in the question; the Mn(s)/Mn^2+(aq) is the anode while the Co^2+(aq)/Co(s) half cell is the cathode.

Hence I can write; Mn(s)/Mn^2+(aq)//Co^2+(aq)/Co(s)

8 0
3 years ago
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