A 1. 00 L volume of HCl reacted completely with 2. 00 L of 1. 50 M Ca(OH)2 according to the balanced chemical equation below. 2HCl Ca(OH)2 Right arrow. CaCl2 2H2O What was the molarity of the HCl solution? 0. 375 M 1. 50 M 3. 00 M 6. 00 M.
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Answer:
The first step is to find the number of moles of OH⁻ that reacted with the HCl. To do this multiply 2.00L by 1.50M to get 3 moles of Ca(OH)₂. Then you multiply 3 by 2 (there are 2 moles of OH⁻ per every 1 mole of Ca(OH)₂) to get 6 moles of OH⁻. That means that you needed 6 moles of HCl since 1 mole of HCl contains 1 mole of H⁺ and equal amounts H⁺ and OH⁻ reacted with each other. To find the molarity of the HCl solution you need to divide 6mol by 1L to get 6M. Tat means that the concentration of the acid was 6M.
I hope this helps. Let me know if anything was unclear.
Explanation:
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What is the charge of an electron? Positive one Positive two Negative one Negative two
Hi! could you help with this (Brainlist + 50 points)
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Final answer:
When a gas is confined in a container, it exerts pressure due to the collision of its particles with the walls of the container. This is explained by the kinetic theory of gases, which states that gas particles are in constant random motion. Temperature also plays a role in gas pressure.
Explanation:
When a gas is confined in a container, it exerts pressure due to the collision of its particles with the walls of the container. This is explained by the kinetic theory of gases, which states that gas particles are in constant random motion. The more collisions occur per unit time, the higher the pressure of the gas.
For example, if you squeeze a balloon, the gas inside it gets compressed, and the particles collide with the surface of the balloon more frequently, resulting in an increase in pressure.
Another factor that influences gas pressure is the temperature. According to Charles's Law, when the temperature of a gas increases, its particles move faster, leading to more frequent and energetic collisions with the container walls, thereby increasing the pressure.
Learn more about Gas Pressure here:
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(2) radium-226 (4) thorium-232
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Answer: Option (1) is the correct answer.
Explanation:
- A positron is a small particle which contains a +1 charge and its mass is equal to the mass of an electron, that is,
kg.
A positron is represent by the symbol .
For example,
- Whereas nitrogen-16 does not decay to give a positron because nitrogen-16 is the daughter isotope formed due to decay of oxygen-16.
The decay reaction is as follows.
- And, on radioactive decay of thorium-232 there will be formation of radium-228 along with emission of an alpha particle.
The reaction will be as follows.
Therefore, we can conclude that out of the given options positrons are spontaneously emitted from the nuclei of potassium-37.
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We are going to use the formula,
Number of moles = Number of molecules / Avogadro's number
We have the number of molecules: 2.0 x 10^22
Avogadro's number: 6.02 x 10^23
Now we will plug in our information in a scientific calculator:
(2.0 x 10^22) / (6.02 x 10^23) = 0.03 moles is our answer.
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Answer:
Only the oxygen needs to be balanced. There are equal numbers of hydrogen and carbon
Explanation:
Given expression:
C₂H₄ + O₂ → 2H₂O + 2CO₂
The law of conservation of mass suggests that chemical equations be balanced since atoms are neither created nor destroyed in the course of a chemical reaction. In retrospect, bonds are broken and chemical species are change to another form.
From the given equation, only oxygen is not balanced. This flouts the law of conservation.
On the reactant side, we have 2 oxygen on the product, we have 6.
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The product of an alphadecay of 222/86 Rn is 218/84 Po (option B).
What is an alpha decay?
Alphadecay is a type of radioactive disintegration in which some unstable atomic nuclei dissipate excess energy by spontaneously ejecting an alpha particle.
An alphaparticle is a positively charged nucleus of a helium-4 atom emitted as a result of radioactivity. It has a formula of 4/2 He.
This suggests that when a 222/86 Rn undergoes alphadecay, the product will have mass and atomic number as follows:
- Mass no.: 222 - 4 = 218
- Atomic no.: 86 - 2 = 84
The element with atomic number 84 is Polonium (Po).
Therefore, option B is correct.
Learn more about alpha decay: brainly.com/question/35140893
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