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Oliga [24]
3 years ago
8

Why is it better to measure the percent change in mass ratherthan just using the change in mass?

Chemistry
1 answer:
never [62]3 years ago
6 0

Answer: The result is presented in proportion which gives a clearer understanding and accurate result.

Explanation: Percentage change in mass is the proportion of the initial mass of a substance changed after sometime. The results is presented as a percentage making it more accurate and can help to give future reference to weight calculations.

Change is Mass is the mass of a substance left after sometime mostly given in grams. It is not as accurate as percentage change in mass. It is generally better to show results in percentage change in mass as it gives a better understanding of what mass of a substance was lost after a given period or after application of energy like Heat or increased temperature.

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Name two elements in which the last electrons to be added are placed into s subshells
LekaFEV [45]
<span>Lithium and Sodium both have their last elections added to s subshells. All alkali and alkali earth metals have their last electrons placed in s subshells.</span>
6 0
3 years ago
Suggest why sodium wasn’t produced until the early 19th century.
AlexFokin [52]

Answer:

The reason is that sodium attaches itself very strongly to other elements. Its compounds are very difficult to break apartand also because it is so reactive.

5 0
3 years ago
4Fe +302 + 2Fe2O3 <br> How many grams of Fe2O3 will be produced from 10.0 g of Fe and 7.00 g of O2?
Molodets [167]

Answer:10g of Fe produces 14.37g of Fe2O3

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Explanation:

3 0
2 years ago
How do I answer and do this
Alecsey [184]

a) When the reaction takes place a yellow precipitate will be formed.

b) The law of conservation of mass is true.

<u>Explanation:</u>

a) When a lead nitrate solution is mixed with a potassium chromate solution, a yellow precipitate containing lead forms according to the equation:

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b) Law of conservation of mass for the given reaction is true.

From the given table we know the mass of reactants and its products.

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The sum of the reactants = 128.71+128.97.

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The sum of the products = 154.10+103.58.

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Thus law of conservation of mass is true for the above reaction.

3 0
3 years ago
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Answer:

1. Dmitri Mendeleev

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3. John Newlands

4. Henry Moseley

If you find this helpful please give me Brainliest award

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3 years ago
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