CHEMISTRY HIGH SCHOOL

Given the balanced equation representing a reaction at 101.3 kPa and 298 K:N2(g) + 3H2(g) => 2NH3(g) + 91.8 kJ
Which statement is true about this reaction?
(1) It is exothermic and DH equals -91.8 kJ.
(2) It is exothermic and DH equals +91.8 kJ.
(3) It is endothermic and DH equals -91.8 kJ.
(4) It is endothermic and DH equals +91.8 kJ.

Answers

Answer 1
Answer: Answer (4)

Endothermic processes: are those in which occurs the absorption of heat.
the change of enthalpy (ΔH) is greater than zero.

hope this helps!

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Answer: Option (A) is the correct answer.

Explanation:

It is known that atomic size of atoms decreases on moving from left to right in a period of the periodic table. Whereas atomic size increases on moving from top to bottom in a group.

Lithium and cesium are both alkali metals. On the other hand, both neon and radon are noble gases.

Both cesium and radon belongs to sixth period. Cesium being at the extreme left side is larger in size than radon which is at the extreme right side of periodic table. Therefore, atomic radius of cesium will be larger than atomic radius of radon.

Whereas both lithium and neon belongs to second period. Lithium being at the top left side of periodic table has larger atomic radius than neon which is at the top right side.  

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Can someone help me with my chemistry homework?!

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Answer:

calculate grams and use mole ratio lol

Explanation:

Answer:

Explanation:

23

Sandy went to the candy store and wanted to use dimensional analysis she had learned in class. She only had a certain amount of money to spend. In terms of price, she figured out the following: 6 lollipops = 5 gum balls, 10 lemon heads = 16 redhots, 8 gum balls = 9 lemon heads. If sandy knows she could buy 3 lollipops, how many lemonheads could she buy with the same money?

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Answer:

about 1-60

Explanation:

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Water molecules are carried into n-butanol.

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n-Butanol molecules are attracted to the surface of the water molecules.

Answers

The steps of solubility of water in N-butanol is as follows:1. N-butanol molecules are attracted to the surface of the water, 2. N-butanol molecules surround water molecules, 3. Butanol mixes with water and 4. Water molecules are carried into N-butanol.

Water is dissolved into n-butanol (a polar liquid). The second step at the molecular level as water dissolves into n-butanol is n-Butanol molecules surround water molecules.

What is dissolving?

Dissolving is a process of fully mixing of the solute into a solvent. When there molecules of solute and the molecules of solvent mixed and there is no difference between them.

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Combination sewers are systems that transport sewage from both domestic and storm sources. Due of the significant amounts of storm water that must be transported during wet weather conditions, combined sewers usually are made up of big pipes or tunnels. Public health may suffer in densely populated cities with inadequate sewage systems.

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A lack of swage structures in overcrowded cities will lead to poor public health, the less structures to hold the mass of peoples sewage will have bacteria in the air causing bacterial infections.   
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