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Alex_Xolod [135]
3 years ago
12

Why does chromium have a 3 charge? why is chromium (vi) oxide [cro3} not chromium 3 oxide?

Chemistry
1 answer:
Citrus2011 [14]3 years ago
6 0
Chromium (VI) has a 6+ charge (we can tell that from the number 6 after it) and you should know that Oxygen has a 2- charge (because it needs 2 more electrons to get a full outer shell).

To work out the formula we need to balance the positive and negative charges.

So we have 6+ and 2-...
We need to make 6- so therefore we times the amount of Oxygen by 3.

This makes the formula CrO3.

Hope this is helpful, message me if you have any questions :)
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If an object what is 30 kg of mass is moving at 10 m/s to the right how much kinetic energy does it have
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4 0
3 years ago
What is the specific latent heat of fusion of ice if it takes 863 kJ to convert 4.6 kg of ice into water at 0 C?
charle [14.2K]

Answer:

The correct answer is 187.7 J/Jg.

Explanation:

The formula for finding the specific heat of fusion is,  

Specific heat of fusion = Q/m

Here Q is the heat energy added, signified in kJ, and m is the mass of the object in kg.  

Based on the given information, the heat energy added or Q is 869 kJ and the mass of the ice is 4.6 Kg

Now putting the values in the formula we get,  

Specific heat of fusion = Q/m

Specific heat of fusion = 863 kJ / 4.6 Kg = 187.7 J/Kg

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