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valkas [14]
3 years ago
5

Which of these is an example of a physical change?

Chemistry
1 answer:
Bingel [31]3 years ago
4 0

A physical change changes the state on object is in, making the answer A) iron melting. Since it's melting, it's going from solid to liquid.

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Answer:

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Explanation:

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the molar mass of water is 18g/mol if you use the Liters in the equation above you can find the number of grams present. divide this number you found by 18 to find the moles.

now take the amount of the other reactant given and divide it by its own molar mass. this will give you the number of moles of that reactant.

divide the moles of water by the moles of the reactant and that is the equivalent.

to find the normality you take this number and divide it by the number of liters.

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