The law of conservation of mass says that matter cannot be created or destroyed. This means that when a chemical reaction happens, you can never create new atoms or destroy the ones that are reacting, they simply rearrange themselves into new substances.
For purposes of looking at chemical equations, this means that the equation that describes the reaction has to be "balanced". In other words, there must be the same number and same kind of atoms on the reactant side of the equation as there are on the product side to ensure that no atoms are created or lost during the reaction.
Answer:
Such reaction's kinetics is slow.
Explanation:
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In this case, in quantitative analysis when using sodium it is mandatory to use a glass buret for titrations as it is accurate in terms of measuring volume; however, when sodium hydroxide is in contact with the glass, a very slow rate is present when it reacts with the silicates in the glass, forming sodium silicate, such rate is in the order of 1.3×10⁻⁴ and 4.3 × 10⁻⁴ g/(m² s). In this manner, as an experiment does not take more than 10 minutes (typical titrations) the time is not enough to for a considerable amount of sodium silicate, that is why its use is widely enforced.
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Answer:
So you should go and try to divide or smth or multiply
Answer:
There are 10.0 moles of beryllium oxide in a 250 grams sample of the compound.
Explanation:
We can calculate the number of moles (η) of BeO as follows:
Where:
m: is the mass = 250 g
M: is the molar mass = 25.0116 g/mol
Hence, the number of moles is:
Therefore, there are 10.0 moles of beryllium oxide in a 250 grams sample of the compound.
I hope it helps you!