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AysviL [449]
2 years ago
12

Fill in the blank with the correct number to balance the equation: 4Cr + 3O2 → ___Cr2O3. (Enter only a whole number.)

Chemistry
2 answers:
Tamiku [17]2 years ago
8 0

The answer should be 2.

You're welcome!

aleksklad [387]2 years ago
7 0

Answer:

2

Explanation:

In order to balance an equation the same amount of atoms of each element in the reactants (the substances on the left of the arrow) must appear in the products (the substances on the right of the arrow). In this particular case, we see that there are 4 Cr atoms and 3*2 = 6 Oxygen atoms as reactants, and the molecule formed has 2 Cr atoms and 3 Oxygen atoms, so if we multiplied the number of molecules by 2, then the equation get balanced, that is:

4Cr + 3O2 -> 2 Cr2O3

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Which one is an expression of distance in Sl units?
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Answer:

500 meters

Explanation:

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2 years ago
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You need to make an aqueous solution of 0.182 M aluminum sulfate for an experiment in lab, using a 250 mL volumetric flask. How
Ksju [112]

Answer:

Hence, 15.99 g of solid Aluminum Sulfate should be added in 250 mL of Volumetric flask.

Explanation:

To make 0.187 M of Aluminum Sulfate solution in a 250 mL (0.250 L) Volumetric flask  

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Using the molarity formula:-  

Molarity = Number of moles/Volume of solution in a liter  

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3 years ago
What is the acceleration object velocity of +25m/s to rest in 5.0 s
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4 0
3 years ago
For the following reaction, identify the element that was oxidized, the element that was reduced, and the reducing agent. Give a
Volgvan

<span>For this reaction, oxidation number of Carbon in CO would be +2 while oxidation number of carbon in CO2 would be +4 and so this means that carbon has oxidized. Oxidation number of nitrogen in NO is +2. While oxidation number of nitrogen in N2 is 0 so this means that nitrogen had reduced. The reducing agent is the one which provides electrons by oxidizing itself so in this case; CO is the reducing agent while the C in CO oxidized to produce electrons. </span><span>I am hoping that this answer has satisfied your query about and it will be able to help you, and if you’d like, feel free to ask another question.</span>

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3 years ago
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borishaifa [10]
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3 years ago
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