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Ulleksa [173]
3 years ago
10

1) How many grams of CO are needed to react with an excess of Fe2O3 to produce 225.5 gFe? Numbers after symbols are subscripts u

nless there is a ^ to show it is an exponent. ........... Fe2O3(s) +3CO(g) -- > 3 CO2(g) + 2 Fe(s) ...........
2) Solid sodium reacts violently with water producing heat, hydrogen gas and sodium hydroxide. How many molecules of hydrogen gas are produced when 65.4 g of sodium are added to water? Numbers after symbols are subscripts unless there is a ^ to show it is an exponent. ............ 2 Na(s) +2 H2O(l) -- > 2 NaOH(aq) + H2(g) ...........
Chemistry
1 answer:
Mrrafil [7]3 years ago
6 0
1)
Moles = mass / Mr
Mr of Fe = 56
Moles of Fe = 225.5 / 56
Moles of Fe = 4.03

Molar ratio CO : Fe = 3 : 2
Moles of CO = 4.03 x 3/2
Moles of CO = 6.04 moles

Mass of CO = 6.04 x (12 + 16)
Mass of CO = 169.1 grams


2)
Moles of Na = 65.4 / 23
Moles of Na = 2.84

Molar ratio Na : H₂ = 2 : 1
Moles of H₂ = 1.42
Each mole has 6.02 x 10²³ particles

Molecules of Hydrogen = 1.42 x 6.02 x 10²³
Molecules of Hydrogen = 8.55 x 10²³ particles
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3 years ago
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Which ion has the largest radius?<br> A. Se ^2-<br> B. o ^2-<br> C. Te^2-<br> D.S^2-
lilavasa [31]
B) O^2-
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6 0
2 years ago
_H2SO4 + __ B(OH)3 = _ B2(SO4)3 + __ H2O
Nana76 [90]

Answer:

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Explanation:

3 0
3 years ago
How would a 2+ ion form from an atom?
slavikrds [6]
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3 0
2 years ago
Given the following balanced equation, determine the rate of reaction with respect to [Cl2]. If the rate of Cl2 loss is 4.44 × 1
PolarNik [594]

Answer:

8.88 x 10⁻² M/s

Explanation:

The rate  of reaction for:

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is rate = -ΔNO/Δt = -ΔCl2/Δt = 1/2 ΔNOCl/Δt

so  ΔNOCl/Δt = 2 ΔCl2/Δt  = 2  x 4.44 × 10⁻²  M/s = 8.88 x 10⁻² M/s

In general given a reaction

                            aA + bB ⇒ cC + dD

rate = -1/a ΔA/Δt = -1/b ΔB/Δt = 1/c ΔC/Δt = 1/d ΔD/Δt

8 0
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