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2 years ago

When heated zinc carbonate decomposed to form zinc oxide and carbon dioxide gas how do you knke decomposition is complete

Chemistry

2 answers:

katrin2010 [14]2 years ago

6 0

Answer:

This reaction is characteristic to metal carbonates, which decompose when heated to form the oxide of the metal and carbon dioxide gas.

Explanation:

Just did it...

shutvik [7]2 years ago

6 0

Answer:

If the temperature is sufficiently above the decomposition temperature, the mass of the mass will reach a steady level. When this occurs, the decomposition is complete.

Explanation:

If you have money and a mass spectrometer, you might consider monitoring the gas space above the zinc carbonate sample for CO2. Once the sample stops emitting CO2, above the decomposition temperature, you may conclude the reaction has gone to completion.

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During photosynthesis, plant cells use sunlight as an energy source; animal cells cannot do this. What substance do Animal cells

8090 [49]

Answer:

Chlorophyll

Explanation:

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2 years ago

a compound has a molar mass of 129 g/mol if its empirical formula is C2H5N then what is the molecular formula

Elena-2011 [213]

Given :

A compound has a molar mass of 129 g/mol .

Empirical formula of compound is C₂H₅N .

To Find :

The molecular formula of the compound.

Solution :

Empirical mass of compound :

$M_e = ( 2 \times 12 ) + ( 5 \times 1 ) + ( 1 \times 14 )\\\\M_e = 43\ gram/mol$

Now, n-factor is :

$n = \dfrac{M}{M_e}\\\\n = \dfrac{129}{43}\\\\n = 3$

Multiplying each atom in the formula by 3 , we get :

Molecular Formula, C₆H₁₅N₃

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