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Aleksandr [31]
2 years ago
12

What mass of O2 is needed to completely react with 500 g of Fe

Chemistry
1 answer:
Zina [86]2 years ago
8 0

Answer:

solution given:

Explanation:

4Fe +3O2------------>2Fe2O3

4mole. 3mole. 2 mole

224g. 96g. 320g

we have

224 g of fe needed to react completely with 96 g of O2

500g of fe needed to react completely with

96 ×500/224=214.3g of O2

214.3g of O2 is a required answer.

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If the rate of appearance of O2 in the reaction: 2O3(g)-----3O2(g) is 0.250 M/s over the first 5.50 s, how much oxygen will form
maks197457 [2]

<u>Given:</u>

Rate of appearance of O2 = 0.250 M/s

Time period = 5.50 s

<u>To determine:</u>

The concentration of O2 formed

<u>Explanation:</u>

2O3 (g) ↔ 3O2 (g)

Rate of appearance of O2 = 1/3 * Δ[O2]/Δt

Based on the given data:

0.250 M/s = 1/3 * [O2]/5.50 s

[O2 ] = 0.250 Ms⁻¹ * 3 * 5.50 s = 4.125 M

Ans: Amount of oxygen formed is 4.13 M


8 0
3 years ago
How many moles of mercury atoms are in 5.418 x 1023 atoms of mercury? moles
Andrej [43]

Answer:

0.9 moles of Hg contain 5.418×10²³ atoms

Explanation:

As we know, Avogadro's number (NA) is the amount of particles that are contained in 1 mol → 6.02×10²³

Let's make a rule of three for this:

6.02×10²³ atoms are contained in 1 mol of Hg

5.418×10²³ atoms would be contained in (5.418×10²³ . 1) / NA = 0.9 moles

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