Which balanced equation represents an endothermic reaction?1.)C+O2-> CO2
2.)CH4+2O2-> CO2+2H2O
3.)N2+3H2-> 2NH3
4.)N2+O2-> 2NO

Answers

Answer 1

Answer:

N2+O2-> 2NO

Explanation:

An endothermic reaction refers to a reaction in which heat taken in. This implies that heat is usually absorbed by the reaction system. The enthalpy of reaction for an endothermic reaction is always positive.

The triple bond between two Nitrogen atoms in N2 gas is very strong due to its small size and the triple bond thus the nitrogen molecule has a high dissociation energy. This accounts for the large amount of energy required to break the triple bond between nitrogen atoms in the nitrogen molecule. This causes the oxidation of Nitrogen molecule to NO to be largely endothermic.

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The amount of heat transferred from an object depends on all of the following exceptA. the specific heat of the object.
B. the change in temperature the object undergoes.
C. the initial amount of Calories in the object.
D. the mass of the object.

Answers

The amount of heat transferred from an object depends on all of the following except the initial amount of Calories in the object. The answer is letter C. The equation to be used to calculate the heat release when solid melts is the enthalpy of melting. It is represented as H = mCpT where H is the heat released after phase change, m is the mass of the substance, Cp is the specific heat capacity of the substance and T is the change in temperature.

On the basis of electronegativity, which pair of elements is most likely to form monatomic ions? responses a. Ba and O b. Cs and Rb c. O and F d. Na and K

Answers

On the basis of electronegativity, elements that are far apart on the periodic table are more likely to form monatomic ions. This is because the larger the electronegativity difference between two elements, the more likely it is for one element to gain or lose electrons to achieve a stable electron configuration.

Out of the given options, the pair of elements that are the farthest apart on the periodic table is option d. Na (sodium) and K (potassium). Both sodium and potassium are in Group 1 (alkali metals), but potassium is located one period below sodium, making it more likely to form a monatomic ion due to the larger electronegativity difference.

Therefore, the answer is d. Na and K.

which of the following is not a safety tip for using household chemicals? a. read the label before use. b. open a fan or window when using chemicals. c. mix household products together. d. wear protective clothing.

Answers

C. Mix household products together

This can create a noxious gas and may hurt or kill you.

Final answer:

The option 'mix household products together' is not a safety tip when using household chemicals. On the contrary, it can be dangerous due to potential harmful reactions. Other tips suggested are all important for safety (option c).

Explanation:

The option that is not a safety tip for using household chemicals is 'c. mix household products together'. Mixing different household chemicals or cleaners can be very dangerous and can lead to harmful reactions.

Such a reaction can produce harmful gases which can be fatal. Other options listed, a. read the label before use, b. open a fan or window when using chemicals and d. wear protective clothing, are all important measures to ensure safety when handling household chemicals.

Learn more about Household Chemical Safety here:

brainly.com/question/34218088

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Describe events in the formation of an evaporite?

Answers

* Alcohol, in function of its defined chemical, evaporates much faster than a water.

* The clothes drying on the Clothesline, the river that evaporates, a puddle of water that dry, etc.

hope this helps!

When harmful bacteria invade a wound, the skin around the wound turns red. This is known as:

Answers

Answer:

Inflammation

Explanation:

Inflammation is the response to a cut. The blood vessels expand when you get cut to allow white blood cells to flock to the wound site. These attack any bacteria that got past the clot. If you mean excess bacteria, then that would be an infection.

3Pb(s) + 2H3PO4(l) →