deeoki3384
21.10.2020 •
Chemistry
If 2 g of element X combines with 7 g of element Y to form compound XY, how many grams of Y
are needed to form compound XY2?
(1 Point)
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Ответ:
14g of Y to form the compound XY₂
Explanation:
In the compound XY, you have 1 mole of X and 1 mole of Y. Thus, you can imagine the molar mass of X is 2g/mol and molar mass of Y is 7g/mol.
Now, in the compound XY₂, you have 1 mole of X but 2 moles of Y.
If you have 2g of X, in this case you will need:
2 moles Y * (7g / mol) =
14g of Y to form the compound XY₂
Ответ:
yes. you need blood to live. if it runs low then your life starts to disappear just like the river would if the water started to run low in it