Answer: March 21
Explanation: March 21
Because at atmospheric pressure the boiling point is below room temperature, just like Oxygen, Nitrogen etc
Answer:
We need 1.714 moles N2
Explanation:
Step 1: Data given
The reaction yield = 87.5 %
Number of moles NH3 produced = 3.00 moles
Step 2: The balanced equation
N2(g)+ 3H2(g) →2NH3(g)
Step 3: Calculate moles N2
For 2 moles NH3 produced we need 1 mol N2 and 3 moles H2
This means, if the yield was 100%, for 3.00 moles NH3 produced , we need 1.5 moles N2
For a 87.5 % yield:
we need more N2, increased by a ratio of 100/87.5.
100/87.5 * 1.5 = 1.714 moles N2
<em>To put it simply, this law states that in a closed system, energy cannot be created or destroyed, but it can be converted from one form to another. A closed system is a system that does not interact with other systems or one that is contained. </em>
<em />
<em>Let’s imagine a pot of water on the stove. It has a lid, so it is not interacting with other systems, and for the purposes of this example, let’s imagine that the lid seals perfectly. When you turn on the burner, you are adding energy to the water in the form of heat. That heat will enter the water. Once it is there, it will be converted as it is absorbed by the water, which will begin to boil as a result. As the water boils, some of that energy will separate the water into gas, or steam. That steam collects on the underside of the pot lid and forms droplets that return to the water. </em>
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<em>In reality, a pot cannot be a completely closed system. If you have boiled water, you will have seen steam escaping along the edges of the lid. It is a good thing that the pot is not perfectly closed because letting off steam is what keeps the pot from exploding as the heat, and consequently the pressure, builds. When you take the lid off a pot that is boiling, you immediately open the system and allow the heat to escape and be converted as water molecules escape into the air. If heat is constantly added to a closed system, it will build pressure as the molecules move faster and faster. Enough pressure can cause a pot to explode because all of that energy has nowhere to go and will eventually push the boundaries of the system. </em>
<em />
<em>While the atmosphere is not a perfectly closed system, in many ways it acts as if it were. Much of the gases on the planet will move continuously around the troposphere, creating weather. Some of those gas molecules will escape into the far reaches of the atmosphere, which is why it cannot be a closed system. But if we think about the way the gases are cycled through the ocean and the atmosphere, it is helpful to keep the law of conservation of energy in mind. </em>
<em />
<em>So therefore the answer is D) It is very difficult to have a system in which no outside gases enter.
</em>
The balanced complete ionic equation for HI(aq) + RbOH(aq) →RbI(aq) +H2O(l) is given by;
Net ionic equation; H+(aq) + OH-(aq) → H2O(l)
<h2>Further Explanation:
</h2><h3>Balancing chemical equation:
</h3>
- Balancing chemical equations is a try and error method that ensures the number of atoms in the side of the reactants is equal to the number of atoms in the side of products.
- Balancing chemical equations ensures that the law of conservation of mass is observed.
- Balancing chemical equations may also require inclusion of state symbols which shows the state of each compound or element involved in the chemical reaction.
<h3>Net ionic equations </h3>
- Net ionic equations that do not include all ions that are present in the reactants and products.
- The equations only includes the ions that are involved in the reaction.
- The ions that are not involved in a chemical reaction are called spectator ions and are cancelled out while writing ionic equations.
A reaction between HI and RbOH is given by;
HI(aq) + RbOH(aq) →RbI(aq) + H2O(l)
- The ionic equation for the reaction will be;
H+(aq) + I-(aq) + Rb+(aq) + OH-(aq) → H2O(l) + Rb+(aq) + I-(aq)
- H+ changes state from aqueous to liquid, OH- changes state from aqueous to liquid, while both Rb+ and I- do not change state and thus are not included while writing the net ionic equation.
Therefore;
Net ionic equation will be;
H+(aq) + OH-(aq) → H2O(l)
Keywords: Net ionic equations
<h3>Learn more about; </h3>
Level: High school
Subject: Chemistry
Topic: Chemical equation
Sub-topic: Net ionic equations
