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geniusboy [140]
3 years ago
8

Wich scientist is credited with developing the first scientific atomic theory

Chemistry
1 answer:
Fantom [35]3 years ago
8 0

Answer:

john dalton

Explanation:

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A student is studying the rate of the following reaction: C2H4O NaOH --> H20 NaC2H3O Knowing that this is an exothermic react
emmasim [6.3K]

Answer:

HCl is not a catalyst because these are not used up during the chemical reactions.

Explanation:

Hello there!

In this case, according to the performed experiments, it is possible for us to realize that HCl cannot be a catalyst for this reaction because it is used up during the reaction. This is explained by the fact that catalyst are able to return to the original form once the reaction has gone to completion; this is the example of palladium in the hydrogenation or dehydrogenation of hydrocarbons depending on the case. Moreover, we know that the catalysts increase the reaction rate because they decrease the activation energy of the reaction and therefore the student observed such increase.

Best regards!

8 0
3 years ago
Which of the following is a physical property of nonmetals?
Minchanka [31]
The answer is (B) non metals are not very good at coducting electricity.
Hope this helps :).
5 0
3 years ago
Which is the electron configuration for zinc?
alisha [4.7K]

[AR] 3d10 4s2 is the configuration for zinc

3 0
3 years ago
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Simon has collected three samples from the coral reef where he observes marine life. He must determine whether each one is a pur
zysi [14]
SAMPLE A - <span>pure substance.
</span>SAMPLE B - <span>homogeneous mixture.
</span>SAMPLE C - <span>heterogeneous mixture.
</span>Pure substance - <span>constant composition and properties.</span>
Homogeneous mixture - same uniform appearance and composition.
Heterogeneous mixture - <span>not </span>uniform<span> in composition, two phases (liquid and dust).
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7 0
3 years ago
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What is the limiting reactant in the following equation? How much Fe2O3 will be produced if 2.1 g of Fe with 2.1 g of O2?
Verizon [17]

Answer:

Fe is limiting, and it will produce .0188 mols of Fe2O3

Explanation:

after you convert both Fe and O2 to mols by using their molar mass, you see there is less Fe than O2 so that is your limiting reactant. To find the amount of Fe2O3 you devide the limiting reactant by it's coefeciant (4) then multiply it by the products coefficant (2). Let me know if you have any questions

8 0
3 years ago
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