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scZoUnD [109]
3 years ago
10

4. Hot material in the Earth's mantle rises and cool material

Chemistry
1 answer:
bagirrra123 [75]3 years ago
4 0

Answer:

Th answer is b. convection.

Explanation:

As the heat rises it cools down and it sinks and as the cold sinks it heats up so then it rises back up.

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If your unknow solid has an impurity that is insoluble in cyclohexane, will this impurity result in the molar mass of the unknow
ser-zykov [4K]

Answer:

High

Explanation:

When the unknown compound contains an impurity that is insoluble in cyclohexane, the solute will not dissolve in the solvent (cyclohexane) completely. ∆T of the solution would be smaller than it is supposed to be, when compared to a compound without such insoluble impurity. Molecular weight determination won't be accurate because the molecular weight obtained will be higher as a result of the fact that the mass of the solute would include the actual solute that is changing the temperature and the excess mass of the impurity.

5 0
3 years ago
Assuming all volume measurements are made at the same temperature and pressure, how many liters of water vapor can be produced w
maria [59]
For the reaction 2 K + F2 --> 2 KF,
consider K atomic wt. = 39
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Now, following the ideal gas equation, PV = nRT
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T = 298 K
Solving for V,
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solve it to get 7517.6 cm^3 as the volume of F2 = 7.5176 liters of F2 gas is needed.


2. Use the formula: volume1 * concentration 1 = volume 2 * concentration 2
where, volume 1 and concentration 1 are for solution 1 and volume 2 and solution 2 for solution 2.

Solution 1 = 12.3 M NaOH solution
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<span> Solving for volume 1, volume 1 = (12.4 L * 1.2 M)/12.3 M = 0.1366 L  </span>
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3 years ago
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