For the chemical reaction C2H6 + 137 kJ C2H4 + H2, the chemical energy of thea. reactant is greater than the chemical energy of the products.
b. products is greater than the chemical energy of the reactant.
c. reactant and the chemical energy of the products are equal.
d. reaction is conserved.

Answers

Answer 1

Answer: The reaction C₂H₆+137kJ→C₂H₄+H₂ is endothermic since the energy is being absorbed by the reaction and not released. We know this by the fact that the energy is on the reactants side of the reaction. If the energy was on the products side of the reaction we would call it exothermic since energy would be being released. Since this reaction is endothermic we know that the products will have more energy than the reactants which means that the answer is B.

(the equation in the question does not have an arrow in it so I assumed it was between the 137kJ and C₂H₄).

I hope this helps. Let me know if anything is unclear.

Answer 2

Answer:

The chemical energy of C2H4 and H2 is greater than the chemical energy of C2H6 .

Explanation:

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juan is planning an investigation about natural reserves. which of these is most likely to be a reliable source of scientific information on the internet

Answers

It depends on the credibility and reliability of the said source. Thus, a primary source is a type of obtaining or sourcing information after the phenomenon occurred at that particular time and when photographs are the first-hand materials that were able to capture that specific moment which then can convey the information. Primary resources also include –newspapers, journal articles, magazines and etc. These information are very vital for its credibility and reliability.

Answer:it’s .gov

Explanation:thanks me later took the test

A pure solvent has a freezing point _________ the freezing point of a solution.a. equal to
b. lower than
c. higher than

Answers

The correct answer is B. A pure solvent has a freezing point lower than the freezing point of a solution. This can be explained by one of the colligative property of a solution called the freezing point depression. A colligative property is a property of a solution which is affected when a solute is being added. This includes, boiling point elevation, vapor pressure lowering and osmotic pressure.

Which compound listed below has the largest molar mass?Ca(OH)2
H20
CaCl2
NH3

Answers

Answer: the answer would be CaCI2

Explanation: this was one of my exam questions i got right. :)

The element in Period 4 and Group 1 of the Periodic Table would be classified as aA. metal
B. metalloid
C. nonmetal
D. noble gas

Answers

Option A. Metal

Starting from K- Potassium up to As-Arsenic are all metals, the three elements are special: Se-Selenium(Non-Metals),Br-Bromine(Halogens),Kr-Noble gas still part of the row but not classified as metal.

What is the noble gas configuration for silicon?

Answers

In the given question, the noble gas configuration for silicon is [Ne] 3s² 3p².

Noble gases are a group of chemical elements that are characterized by their low reactivity and stable electronic configuration. The six noble gases are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).

The noble gas configuration of an element is the electron configuration of the nearest noble gas element.

In the case of silicon, the nearest noble gas to it is neon (Ne), which has an electron configuration of 1s² 2s² 2p⁶.
To write the noble gas configuration for silicon, we first write the electron configuration of silicon, which is 1s² 2s² 2p⁶ 3s² 3p².
Then, we look at the electron configuration of the nearest noble gas element, which is neon, and write its electron configuration in brackets, [Ne].
Finally, we add the remaining electrons of silicon's electron configuration after the noble gas configuration.

Therefore, [Ne] 3s² 3p² is the noble gas configuration for silicon.

Learn more about noble gas here:

brainly.com/question/32007931

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The noble gas configuration of Silicon is [Ne] 3s23p2. The full electron configuration of silicon is 1s22s22p63s23p2. To find its noble gas shorthand, look at the full electron configuration and see how many filled shells there are. For silicon, all but the outermost shell is filled. So the number of filled shells is 2. Now look at the periodic table and find the noble gas at the end of the period the same as the number of filled shells. The noble gas at the end of Period 2 is neon, Ne.

When the solids ba(oh)2 and nh4scn are mixed, a solution is produced and the temperature drops. ba(oh)2 (s) 2nh4scn(s) → ba(scn)2 (aq) 2nh3 (g) 2h2o(l) which statement about the energetics of this reaction is correct? a. the reaction is endothermic and h is negative. b. the reaction is endothermic and h is positive. c. the reaction is exothermic and h is negative. d. the reaction is exothermic and h is positive.

Answers

In the given chemical reaction:

Ba(OH)2 (s) + 2NH4SCN (s) → Ba(SCN)2 (aq) + 2NH3 (g) + 2H2O (l)

Since the temperature drops, it indicates that heat is being absorbed from the surroundings. This implies that the reaction is absorbing heat and is, therefore, an endothermic reaction.

Among the options provided, the correct statement about the energetics of this reaction is:

b. the reaction is endothermic and ∆H is positive.

Final answer:

The reaction between Ba(OH)2 and NH4SCN is endothermic and the enthalpy change (ΔH) is positive. This is because the reaction absorbs heat from the surrounding environment, causing the temperature to drop. The ΔH is positive in this type of endothermic reaction.

Explanation:

When solids Ba(OH)2 and NH4SCN are mixed, a solution is produced and the temperature drops. This indicates that the reaction is endothermic, which means it absorbs heat from the surroundings. As a result, the surroundings (or in this case the solution) will experience a decrease in temperature. According to the conventions used in chemistry, in an endothermic reaction, the enthalpy change (ΔH) is positive. Hence, the correct statement about the energetics of this particular reaction is: 'The reaction is endothermic and ΔH is positive.'

When considering the enthalpy change of a reaction, it's also key to understand that an exothermic reaction results when the bonds in the products are stronger than the bonds in the reactants - this is characterized by a negative ΔH (heat is released). In contrast, bonds in the products of an endothermic reaction are weaker than in the reactants, resulting in a positive ΔH (heat is absorbed).