State the use of multimeters
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Answer:
a use of mesurements
Explanation:
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A material is ductile, conducts electricity, and is magnetic. The material is a _____. metal nonmetal metalloid impossible to tell
What is true about blood alcohol concentration?
PLEASE HELP!! Perform the followingmathematical operation, andreport the answer to theappropriate number ofsignificant figures.5.1 – 2.3685 = [?]
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Answer:
V=d/t
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The best statement among the following which explains whether alchemy is a science or pseudoscience is "It is pseudoscience because each metal is known to be a unique element." Hence, Option (D) is correct.
What is Alchemy ?
Alchemy began to fully evolve into chemistry in the 17thcentury, with a greater emphasis on rational thought and experimentation and less emphasis on spirituality and mysticism.
The alchemists were never successful in changing lead into gold, but modernnuclear physics can accomplish this task.
Therefore , The best statement among the following which explains whether alchemy is a science or pseudoscience is "It is pseudoscience because each metal is known to be a unique element." Hence, Option (D) is correct.
Learn more about Alchemy here ;
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Answers
Answer:
53.4%
Explanation:
N₂ + 3H₂ → 2NH₃
Given that:
26.3 g of H₂ react with N₂ to produce 79.0 g of NH₃
Then:
The number of moles of H₂ = 26.3g of H₂ * (1 mol of H₂/ 2.02g of H₂)
= 13.05 mol of H₂
The number of moles of NH₃ = 13.05 mol of H₂ * ( 2mol of NH₃/ 3 mol of H₂)
= 8.697 mol of NH₃
The mass of NH₃ = 8.697 mol of NH₃ *( 17.04g of NH₃/ 1 mol of NH₃) = 148.1 g of NH₃
The percent yield = actual yield/ theoretical yield * 100%
The percent yield = ( 79.0 g/ 148.1 g )* 100%
The percent yield ≅ 53.4 %
Answer:
53.4
Explanation:
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cohesion is the tendency for the same type of molecules to stick together!
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Total, 2.28916 × 10²⁴ atoms of carbon in 3.8 moles of methane.
To calculate the number of atoms of carbon in 3.8 moles of methane (CH₄), we need to consider the molecular formula of methane, which is CH₄. This indicates that each molecule of methane contains one carbon atom (C) and four hydrogen atoms (H).
First, let's find total number of carbon atoms in 3.8 moles of methane:
Number of moles of carbon in 1 mole of methane (CH₄) = 1 mole (because there is 1 carbon atom in each molecule of CH₄)
Number of moles of carbon in 3.8 moles of methane = 3.8 moles
Now, we'll use Avogadro's number to convert moles to the number of atoms:
Avogadro's number (NA) = 6.022 × 10²³ atoms/mol
Number of carbon atoms in 3.8 moles of methane = 3.8 moles × Avogadro's number
Number of carbon atoms in 3.8 moles of methane = 3.8 moles × 6.022 × 10²³ atoms/mol
Now, let's calculate:
Number of carbon atoms in 3.8 moles of methane ≈ 2.28916 × 10²⁴ atoms
So, there are approximately 2.28916 × 10²⁴ atoms of carbon in 3.8 moles of methane.
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A mixture is a combination of two or more substances without any chemical reaction occurring between them. Components of a mixture can be separated using physical methods such as heating, filtering, evaporation, .... etc
A two-phase mixture is a type of mixture that contains two different phases of matter, for example solid and liquid phases in one mixture or liquid and gas phases in one mixture.
Now, we can give examples of two-phase mixtures and mention how to separate them:
A mixture of sand and water is considered a two-phase mixture (sand is sold and water is a liquid).
The components can easily be separated using filtration where the sand will remain on the filter paper and water will pass.
Another example is a mixture of sugar and water (sugar is a solid and water is a liquid).
The components can be separated by heating. We can eat the mixture until water evaporates and the sugar is precipitated. The evaporated water can then be condensed into a different container.
Hope this helps :)
is an example of two-phase mixture and this can be separated by
.
Further explanation:
Mixture:
The material that is made up of two or more substances is called a mixture. It has no fixed formula and its composition is also varied. All the individual constituents retain their properties after the formation of the mixture.
Types of mixtures:
1. Homogeneous mixtures
Homogeneous is a Latin word that means the same. These mixtures have a uniform composition throughout. These types of mixtures consist of a single phase only. Air, orange juice and blood are the examples of a homogenous mixture.
2. Heterogeneous mixtures
Heterogeneous is a Latin word that means different. These mixtures that have non-uniform composition throughout. These mixtures have more than one phase. Concrete, soda and chocolate chip cookies are the examples of a heterogeneous mixture.
Characteristics of mixtures:
1. It has a variable composition and has no formula.
2. Mixtures are not formed by any chemical reactions.
3. Mixtures can be either homogeneous or heterogeneous.
4. The constituents of the mixtures can be separated by physical methods such as filtration, heating, drying, distillation, crystallization.
5. The properties of the individual particles of the mixture are retained even after the formation of mixtures.
A mixture of sand and water is an example of a two-phase mixture. Here sand is a solid whereas water is a liquid. The components of the mixture are separated by filtration. Sand will remain on the surface of filter paper while water passes through it.
Learn more:
1. Characteristics of a mixture: brainly.com/question/1917079
2. Example of physical change: brainly.com/question/1119909
Answer details:
Grade: High School
Subject: Chemistry
Chapter: Elements, compounds, and mixtures
Keywords: mixture, characteristics, formula, composition, properties, chemical reactions, filtration, distillation, heating, crystallization, homogeneous, heterogeneous, solid, liquid, sand, water, filter paper.