Question

A metal x with relative atomic mass 56 forms an oxide with formula x2O3 . How many grams of metal will combine with 10g of oxygen?(o= 16)

Answer 1

?X + ?O2 --- > ? X2O3 well we will need at least 6 O atoms
4 X + 3 O2 ---> 2 X2 O3
so 10 g O
mols O * 16 grams/ mol = 10 grams
that is 10/16 = 0.625 mols O
every mol of X2O3 contains 3 mols of O
so we have 0.625/3 = 0.298 mols of X2O3 or 0.596 mols of X
.596 * 56 = ?

Answer 2

thanks

Answer 3

Good

Answer 4

Good, but I don't really understand

Answer 5

I need some explanation to decode this please

Answer 6

I am explanation to decode this pls

Answer 7

I don't understand can U pls explain further

Answer 8

not clear enough

Answer 9

4

Answer 10

23.3

Answer 11

Calculate the concentrations in g/dm3of CL ions in 0.3m sodium chloride solutions

Answer 12

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Answer 13

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Answer 14

35.8g of a mixture of potassium chloride and potassium trioxochlorate (v)were heated to a constant to a constant mass.if the residue weighed 24.9g what was the percentage mass of potassium chloride in the mixture.kcl is not decomposed onmheating

Answer 15

An excess of divalent metal M was dissolved in a limited volume of hydrochloride acid .if 576cm of hydrogen were liberated at STP what was the mass of metal that produced this volume of hydrogen (m=24,H=1,molar volume of a gas at STP=22.4dm3

Answer 16

What volume of 0.05mol/dm3 NaCl

Answer 17

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Answer 18

A solution contains 0.1molar of the sodium per dm3 of solution .what volume of water in dm3 will be added to dilute it to 0.01g/dm3

Answer 19

If 5.00cmof 2.20mol/dm Na2CO3 of diluted water with distilled water to obtain 250 solution what is the concentrations of resulting solution