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I am Lyosha [343]
3 years ago
11

Someone please help me with my quiz about Moles for chemistry!

Chemistry
2 answers:
astra-53 [7]3 years ago
5 0

Answer:

A

C

A

Explanation:

Iam not sure if it's correct

lana66690 [7]3 years ago
3 0

ANSWER;

1: D

2: C

3: A

THANKS ME LATER

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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!

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3 years ago
A compound is found to contain 58.80 % xenon, 7.166 % oxygen, and 34.04 % fluorine by mass. what is the empirical formula for th
marissa [1.9K]
To make it easier, assume that we have a total of 100 g of a compound. Hence, we have 58.80g of xenon, 7.166g of oxygen, and 34.04g of fluorine. 
Know we will convert each of these masses to moles by using the atomic masses:

58.8/131.3 = 0.45 mole of Xe
7.166/16 = 0.45 mole of O
34.04/19 = 1.79 mole of F

Now, we will divide all the mole numbers by the smallest among them and get the number of atoms in the compound:

Xe = 0.45/0.45 = 1
O = 045/0.45 = 1
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6 0
3 years ago
What is ionization energy?
Scilla [17]
The minimum amount of energy required to move most loosely bound electron of a isolated neutral gas atom or molecule
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DNA has 2 strands. if the sequence of nucleotides of one strand was known, is it possible to use the information to determine th
ANTONII [103]
DNA has four main components.
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Cytosine=C
Guanine=G
Thymine=T

Since each letter has an opposite it would be possible by considering the pairs.
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AGCCTAGGTAC
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What are chemical formulas? Give an example of a chemical formula.
aniked [119]

Explanation:

NaCl, HCl, NaOH, KCl, CH3COOH

4 0
3 years ago
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