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2 years ago

How many kilo joules of heat are required to the decompost 1.96 mol Nah I 3(s)

Chemistry

1 answer:

drek231 [11]2 years ago

5 0

Heat required = = 126.42 kJ

<h3>Further explanation</h3>

Given

1.96 mol NaHCO₃(s)

Required

Heat needed

Solution

Reaction( decomposition of Baking soda (NaHCO₃) :

2NaHCO₃ (s) + 129 kJ ⇒ Na₂CO₃ (s) + H₂O (g) + CO₂ (g)

For 2 mol NaHCO₃ , heat needed = 129 kJ

conversion factor :

$\tt \dfrac{129~kJ}{2~mol}$

So for 1.96 mol :

= 1.96 mol x (129 kJ/2 mol)

= 126.42 kJ

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Methane can be decomposed into two simpler substances: hydrogen and carbon. Therefore, methane 1. is a gas. 2. cannot be an elem

Reika [66]

Answer: 2. cannot be an element.

Explanation:

Element is a pure substance which is composed of atoms of similar elements.It can not be decomposed into simpler constituents using chemical reactions.Example: Copper $Cu$

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: methane $CH_4$

$CH_4\rightarrow C+2H_2$

Thus as it can be decomposed into its constituent elements, it is a compound.

Mixture is a substance which has two or more components which do not combine chemically and do not have any fixed ratio in which they are present.

Thus methane cannot be an element.

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2 years ago

Trans fats: Think about how the prefix trans- is used in naming alkenes.

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2 years ago

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The following choices contain densities of various materials. Based on these data, which will yield the fastest seismic velocity

Eduardwww [97]

Answer:

D. 5.6 g/cm^3

Explanation:

On the average seismic velocity increases with increase in depth due higher the pressure and more compaction

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P = 0.31×V^0.25

A derivation of the original Gardner equation to calculate the average densities for sands and shales in wells.

ρ = α ×V^β

where

ρ = bulk density in g/cm3,

V = P-wave velocity,

α = 0.31 for V (m/s) and 0.23 for V(ft/s) and

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ρ = 0.31 ×V^0.25

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3 years ago

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mario62 [17]

Answer:

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Explanation:

a) Data and Calculations:

Locations Cost of land Cost of Cost of mining Time taken to

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1 $100,000 $10,000 $5,000 per day 30 days

2 $35,000 $6,000 $4,500 per day 45 days

3 $30,000 $7,500 $3,500 per day 120 days

4 $40,500 $8,000 $7,000 per day 65 days

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2 years ago

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Answer:

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Explanation:

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