What is the theoretical yield of H2O if 130 g of H2O is produced from 18 g of H2 and an excess of O2?
Answers
Answer: The theoretical yield of water is 162 grams.
Explanation:
To calculate the number of moles, we use the equation:
.....(1)
Given mass of hydrogen gas = 18 g
Molar mass of hydrogen gas = 2 g/mol
Putting values in equation 1, we get:
The chemical equation for the formation of water from hydrogen gas and oxygen gas follows:
As, oxygen gas is present in excess. It is considered as an excess reagent.
So, hydrogen gas is considered as a limiting reagent because it limits the formation of product.
By Stoichiometry of the reaction:
2 moles of hydrogen gas produces 2 moles of water
So, 9 moles of hydrogen gas will produce = of water
Now, calculating the mass of water from equation 1, we get:
Molar mass of water = 18 g/mol
Moles of water = 9 moles
Putting values in equation 1, we get:
Hence, the theoretical yield of water is 162 grams.
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Write a story about Bacteria using asexual reproduction it must include a reason why it is engaging in asexual reproduction. It must also include one benefit and one disadvantage to asexual reproduction. It must be 6 sentences long and use appropriate spelling and conventions.
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Option A. salt flat is the correct answer. A halophile is most likely to be found in a salt flat, as it aligns with the habitat where halophiles are most commonly found due to their ability to thrive in high-salinity conditions.
Halophiles are organisms that thrive in environments with high salt concentrations. Salt flats, also known as salt pans or salt deserts, are large expanses of flat land covered with salt and other minerals. These areas typically form in arid or semi-arid regions where water evaporates, leaving behind concentrated salt deposits.
Salt flats are characterized by their stark, white appearance due to the accumulation of salt crystals on the surface. The high salt content makes these areas inhospitable to many other forms of life, but halophiles have evolved unique mechanisms to tolerate and even benefit from the high salt concentrations.
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Final answer:
A halophile can be found in salt flats, ocean floors, swamps or marshes, and hydrothermal vents.
Explanation:
Halophiles are organisms that can be found in highly saline environments. They have adapted to survive in areas with high salt concentrations. Some of the locations where halophiles can be found include:
- Salt flats: These are areas where water evaporates, leaving behind a high concentration of salt. Halophiles are able to survive in these extreme conditions.
- Ocean floors: Certain areas of the ocean, such as saltwater lakes or lagoons, have high salt concentrations. Halophiles have adapted to live in these environments.
- Swamps or marshes: These areas may have high salt content due to the presence of saltwater or brackish water. Halophiles can thrive in these habitats.
- Hydrothermal vents: These are underwater geysers that release hot, mineral-rich water. Some hydrothermal vents have high salt concentrations, providing a suitable habitat for halophiles.
Halophiles have unique mechanisms to cope with the osmotic stress caused by the high salt content. They may have specialized enzymes and transport proteins that allow them to maintain proper cellular function in these extreme conditions.
Halophiles play an important role in the ecosystem by contributing to nutrient cycling and serving as a food source for other organisms.
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Hope this helped and have a nice day : )
Answers
Answer: Option (d) is the correct answer.
Explanation:
At high temperature, there will be more collision between the molecules as a result more energy will generate. Thus, a wave can move quickly.
In case of solids, the particles are held more closely with each other. Therefore, when temperature is high then solid particles being closer can pass on the energy more quickly as compared to gases.
Thus, we can conclude that waves move fastest in high-temperature solids.
Final answer:
In Physics, waves move fastest in high-temperature solids due to the close proximity of particles which facilitates faster wave transmission and the increased kinetic energy at high temperatures.
Explanation:
In the study of Physics, the speed of sound waves varies depending on the properties of the medium through which they are traveling. Solids have tightly packed particles which facilitate faster wave transmission. Conversely, gases have loosely packed particles which slow down wave travel. Temperature, while affecting speed at some level, doesn't have as significant an influence as the state of matter itself.
Therefore, among the options you provided: low-temperature gases, low-temperature solids, high-temperature gases, and high-temperature solids, waves move fastest in high-temperature solids.
This is due to the increased kinetic energy of the particles in a high-temperature solid as compared to a low-temperature solid; and the closer proximity of particles in a solid as compared to a gas.
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(2) Pb(CrO4)2 (4) Pb2(CrO4)3
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Lead chromate and lead sulfate are found in the crystal Pb(Cr, S)O₄, which is a changeable solid mixed phase. This material is the end product of a co-precipitation reaction between lead and chrome salts (see the chapter on production and usage for further information). The correct option is 1.
Water does not dissolve lead chromate, which is produced by the double decomposition process. It is also used as a pigment and is referred to as chrome yellow. In a media that has been buffered with a solution of acetic acid and lead acetate, the lead precipitates as chrome.
There may be significant amounts of water-soluble lead compounds in lead chromate pigments. The formula that represents Lead (II) Chromate is PbCrO₄.
Thus the correct option is 1.
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B) compound
C) mixture
D) solution
Answers
B) compound is a pure substance
Further explanation
A pure substance can be an element or compound.
The element is a single substance that cannot be broken down anymore or the simplest substance.
While the compound is a pure substance that is formed from a combination of two or more elements through chemical reactions and has a constant chemical ratio.
A mixture is a combination of two or more single substances. The properties of the mixture component are not lost / unchanged as in compounds.
The mixture can be divided into a homogeneous mixture if the composition / ratio of each substance in the mixture is the same and heterogeneous mixture if the ratio of the composition of the substances is not the same (can be varied) in each place.
Mixtures can also be divided into solutions, suspensions and colloids based mainly on the size of the particles
- A) alloy
alloy is a mixture of elements that have metal properties
- B) compound
Compounds are represented in chemical formulas which can be separated into their constituent elements by chemical processes
- C) mixture
can be separated by physical or mechanical means, the composition can be changed depending on the proportion of pure substances that form it
- D) solution
Solution is: a mixture of two or more substances consisting of a solute and a solvent. The particle size of the solution is very small, less than 1 nm.
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A heterogeneous mixture
a homogeneous mixture
an example of a physical change
Answers
Answer:
True
Explanation:
The complete question is:
"A reaction contains two reactants, A and B. If A is doubled, there will be a greater number of effective collisions between reactants. TRUE FALSE"
Collision Theory indicates that chemical reactions take place because molecules, atoms or ions collide with each other.
Furthermore, the molecules must collide effectively, that is, not all reagent collisions lead to product formation. Effective shock means that the reagent molecules have enough kinetic energy at the time of the shock for their bonds to break and product bonds to form. In addition, the molecules of the reagents must be properly oriented for the reaction to take place.
As the concentration increases, the number of shocks increases. In other words, by increasing the concentration of the reactants, the probability of collision between their molecules increases, and therefore the number of effective collisions.So the statement is true-