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IrinaVladis [17]
3 years ago
9

Which two elements on the periodic table are in the same period? 1:b and in 2:na and s 3:k and ba 4:se and te

Chemistry
2 answers:
KengaRu [80]3 years ago
8 0
The answer will be 4
zhannawk [14.2K]3 years ago
5 0
Se and te
hope this helps xx
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Water gas, mixturee of H2 and CO, is an important industrial fuel produced by the reaction of steam with red hot cake, essential
castortr0y [4]

Answer:

\boxed{\text{131.3 kJ/mol}}

Explanation:

The formula for calculating the enthalpy change of a reaction by using the enthalpies of formation of reactants and products is

\Delta_{\text{r}}H^{\circ} = \sum \Delta_{\text{f}} H^{\circ} (\text{products}) - \sum\Delta_{\text{f}}H^{\circ} (\text{reactants})

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ΔH°f/kJ·mol⁻¹:      0      -241.8      -110.5        0

\begin{array}{rcl}\Delta_{\text{r}}H^{\circ} & = & -110.5 - (-241.8)\\& = & -110.5 + 241.8\\& = & \textbf{131.3 kJ/mol}\\\end{array}\\\text{The enthalpy of reaction is }\boxed{\textbf{131.3 kJ/mol}}

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3 years ago
In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?
Lelechka [254]

<u>Answer:</u>

Shifts the equilibrium to side that has fewest moles of gas.

<u>Explanation</u>:

"Le Chatelier's principle", also called as the equilibrium law in chemistry explains the effect in different states on some chemical equilibria. It states that when a system is in equilibrium for a long time, it is subject to change in pressure, volume, temperature or condensation.

In this case, with an "increase" in pressure, there would be a shift to the side of fewer moles of gas. Mainly the change towards the reactants.

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Thermometers measure temperature according to well-defined scales of measurement. The three most common temperature scales are Fahrenheit, Celsius, and Kevin

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We can choose reducing agent to convert ethyl butanoate to 1-butanol. LiAlH4 is the reducing agent that can convert ethyl butanoate to 1-butanol. The reaction is shown as below in the attachment:

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