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3 years ago

Brass is a solution in which a solid is dissolved in a(n)

Chemistry

1 answer:

dalvyx [7]3 years ago

5 0

Brass is a solution in which a solid is dissolved in a solid.

Option D

Explanation:

Brass is an example of alloy, a proportionate mixture of two metals: zinc and copper. Alloys are solid-solid solutions where a metal is mixed with one or more other types of metals or non-metals to form a new material, better in mechanical and chemical properties than the original components.

Increased resistance to corrosive actions, increased strength and toughness, better electrical conductivity, wider temperature operability, etc. are some advantages of alloying. Brass is widely used in manufacturing appliance parts and tools including valves, gears and bearings.

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Answer:

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Explanation:

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A photon has 8.0 × 10–15 J of energy. Planck’s constant is 6.63 × 10–34 J•s. What is the frequency of the photon

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The formula is:
frequency * h (Planck's constant) = Energy
So, to find frequency you need just divide energy by the constant:
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4 years ago

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4 years ago

Plz help I need help fast

CaHeK987 [17]

Answer: The correct answer is A. Molality. It is the concentration expressed as moles of solute per kilogram solvent. It is most commonly used in solving problems involving Colligative Properties (e.g. boiling point elevation, freezing point depression). Other ways to express concentration are Molarity, Mole Fraction, Parts per Million, Parts per Billion, and Normality.

Further Explanation

B. Mole Fraction is the ratio of the moles of a solute to the total moles of the solution. This unit of concentration is expressed as:

$mole\ fraction \ of \ x = \frac{moles \ of \ solute \ x}{total\ moles \ of \ solution}$

C. Molarity is the most common ways of expressing concentration. It is the amount of solute per liter of solution and is expressed as:

$Molarity\ (M) \ = \frac{moles \ of \ solute}{liter \ of \ solutiont}$

D. ppm (or parts per million) is used for very dilute solutions. It is expressed as the mass of solute in milligrams per liter of the solution:

$parts\ per \ million \ (ppm) = \frac{mass\ of \ solute \ (in\ mg)}{liter\ of\ solution}$