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nirvana33 [79]
3 years ago
15

In two or more complete sentences, design an extension of this experiment to determine the mass of the carbon dioxide gas that w

as produced. Include a hypothesis regarding the mass of the gas in grams. Write your answer in the essay box below.
Chemistry
1 answer:
VARVARA [1.3K]3 years ago
6 0

Answer:

The co2 si the e theing for he h2o for the photosysthis of the moon= mass

Explanation:

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Which of the following is not a polymer<br>A. Glucose.<br>B. Starch.<br>C. Cellulose.<br>D. DNA.
WARRIOR [948]

Answer:

A. Glucose

Explanation:

Glucose is a monomer and not a polymer. So, option (A) is not a polymer.

3 0
3 years ago
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Any change that alters a substance without changing it into another substance.
Ber [7]
A physical change.

Physical change = can be reverted + doesn't change substance
Chemical = changes substance
7 0
3 years ago
To measure the amount of iron in a certain type of iron ore, an analytical chemist dissolves a sample in strong acid and titrate
Fiesta28 [93]

Answer:

\% Fe=11.4\%

Explanation:

Hello!

In this case, for the described chemical reaction, we find it is:

8H^+(aq)+5Fe^{2+}(aq)+MnO_4^-(aq)\rightarrow 5Fe^{3+}(aq)+Mn^{2+}(aq)+4H_2O(l)

Because it says that the iron is dissolved in a strong acid which provides addition hydrogen ions to the reaction media. Thus, for the questions attached on the figure we find:

- This a REDOX reaction because we see iron is being oxidized from 2+ to 3+ and manganese reduced from +7 to +2.

- Since it is a redox reaction and the oxidized species is that undergoing an oxidation number increase, we evidence iron goes from +2 to +3, which means iron is the oxidized species.

- In this case, for the used 59.2 mL (0.0592 L) of the 0.2000 M solution of potassium permanganate, we can compute the consumed grams of iron via stoichiometry including the 5:1 mole ratio between them in the chemical reaction:

m_{Fe^{2+}}=0.0592L*0.2000\frac{molMnO_4^-}{L}*\frac{5molFe^{2+}}{1molMnO_4^-}  *\frac{55.85gFe^{2+}}{1molFe^{2+}} \\\\m_{Fe^{2+}}=3.31gFe^{2+}

It means that the percent of iron in that sample is:

\% Fe=\frac{3.31g}{29.00g} *100\%\\\\\% Fe=11.4\%

Best regards.

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3 years ago
You’re beautiful *heart*
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I’m not your just blind. I’m sorry
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On a potential energy diagram, what is true about activation energy?
jonny [76]

Why hello there!

The correct answer to your question is C because exothermic energy is based of on using heat and heat acts like the activation !

If my answer helped please mark me as brainliest i really want to rank up thank you and have the best day ever!

7 0
3 years ago
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