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Igoryamba
3 years ago
8

What is a spectator ion?

Chemistry
2 answers:
Papessa [141]3 years ago
6 0
<span>A spectator ion is an ion that exists in the same form on both the reactant and product sides of a chemical reaction.</span>
Tom [10]3 years ago
5 0

Answer:

Ions that are not changed in the reaction

Explanation:

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Answer:

a

Explanation:

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3 years ago
Acetylene burns in air according to the following equation: C2H2(g) + 5 2 O2(g) → 2 CO2(g) + H2O(g) ΔH o rxn = −1255.8 kJ Given
professor190 [17]

Answer:  -227 kJ

Explanation:

The balanced chemical reaction is,

C_2H_2(g)+\frac{5}{2}O_2(g)\rightarrow 2CO_2(g)+H_2O(g)

The expression for enthalpy change is,

\Delta H=\sum [n\times \Delta H_f(product)]-\sum [n\times \Delta H_f(reactant)]

\Delta H=[(n_{CO_2}\times \Delta H_{CO_2})+ n_{H_2O}\times \Delta H_{H_2O})]-[(n_{C_2H_2}\times \Delta H_{C_2H_2})+(n_{O_2}\times \Delta H_{O_2})]

where,

n = number of moles

\Delta H_{O_2}=0 (as heat of formation of substances in their standard state is zero

Now put all the given values in this expression, we get

-1255.8=[(2\times -393.5)+(1\times -241.8)]-[(1\times \Delta H_{C_2H_2})+(\frac{5}{2}\times 0)]

-1255.8=[(-787)+(-241.8)]-[(1\times \Delta H_{C_2H_2})+(0)]

\Delta H_{C_2H_2}=-227kJ

Therefore, the enthalpy change for C_2H_2 is -227 kJ.

7 0
3 years ago
If 125 gram of 75% pure Caco3 is treated with 100 gram of Hcl to produce Cacl2 H20 and Co2 Find which one is limiting reactant​
damaskus [11]

Answer:

x

Explanation:

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1. A doctor has ordered 1.5 liters of normal saline for a patient. If it has to be given over 10 hours, how many liters per hour
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How you find a unknown element (just with the atomic emission spectrum)
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Each natural element has a characteristic light spectrum that helps identify it in samples of unknown substances. Spectroscopy is the practice of examining spectra and comparing them to those of known elements. Using spectroscopy methods, scientists can identify pure substances or compounds and the elements in them.
5 0
2 years ago
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