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Anastasy [175]
3 years ago
13

A sample of 254.2 grams of copper completely reacted with oxygen to form 286.2 grams of copper oxide product how many grams of o

xygen reacted
Chemistry
1 answer:
PolarNik [594]3 years ago
5 0

During a chemical reaction nb of atoms and mass is always conserved , so mass of Reactants is equal mass of Products.

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A) Carbon

Explanation:

the others are wrong its A

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Someone please help? I've had a go at this myself (see picture of working attached) but not sure where to go from there?
DiKsa [7]

Answer:

75 ml of 0.1M  base neutralizes 25 ml of 0.1M acid, which means the acid has 0.3 moles/L of H ion

but that means each molecule of the acid has 3 times as many H ions aH ions in a molecule of NaOH

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Explanation:

75ml of a solutipn of 0.1moL  l-1 NaOH neutralises 25ml of a solution of an acid. The formula of the acid is HxA and the concentration of the acid is 0.1mol l-1. What is the value of x?​

the concentration of both the and the base are the same at 0.1M

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75 ml of 0.1M  base neutralizes 25 ml of 0.1M acid, which means the acid has 0.3 moles/L of H ion

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6 0
3 years ago
Layered metamorphic rocks
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