An inventor claims to have developed a new perfume that lasts a long time because it doesn’t evaporate. Comment on this claim.

Q: In very cold countries alcohol is used as a thermometric liquid because    A) alcohol is a poor…

A: The freezing point of an alcohol is as low as  -117°C. Therefore it won't freeze even in very cold…

Q: a breakfast of ceriel, orange juice, and milk contain 230 nutritional calories. Exress this energy…

A: GivenEnergy  = 230 Calories

Q: The karat is a dimensionless unit that is used to indicate the proportion of gold in a…

A: Given data- One karat gold contains a weight of pure gold that is one part in twenty four(24).  So…

Q: Name three disadvantages that wood phone cases may have when compared to polycarbonate: 1. 2. 3.

A: Polycarbonates are basically the plastic covers we generally use. Let us find some disadvantages of…

Q: Which of the following methods is the best way to keep a used steel wool? Why? Keep it immersed in…

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Q: Why is half frozen fruit punch always sweeter than completely melted fruit punch?

A: The sweetness depends on the concentration of the sugar.One of the main constituents of fruit is…

Q: What is known as ideal mixture ?

A: Required : What is ideal mixture

Q: Why is plastic a problem

A: Any plastic waste material like bags, bottles, and clothes that enter the environment creates…

Q: If you are asked to make a very sensitive glass thermometer, which of the following working liquids…

A: To select the correct Option

Q: X Eighth-grade students selected their favorite pizza flavor given the choice between cheese,…

A:

Q: xture consists of 30 g of ice and 20 g of liquid water, both at 0°C. The amount of heat that must be…

A: energy required to melt all ice Mixture contain = 30g ice + 20g water at 0°c  TEMP OF LIQUID WATER…

Q: 75.  The name of C6H13OH is   A. heptonol   B. hexanol   C. hexyl   D. heptyl alcohol   E.…

A:

Q: Which one of the following is not an amorphous substance? (A) Rubber (B) Glass (C) Polymer (D)…

A: In physics and chemistry, amorphous is a term used to describe a solid which does not exhibit…

Q: When a pressure of 2.0 MPa is applied to a sample of kerosene, it contracts by 0.15%. The value of…

A: Given: Applied pressure, P=2.0 Mpa=2×106 Pa Volume contraction, ∆VV=0.15%=0.15100

Q: 47. | The distance between the molecules The repulsive force between two molecules B D Figure 10

A:

Q: The volume increase of ethanol when its temperature is increased by 30 ° C is 0.60L. Determine the…

A: Given : Let volume of ethanol initially be V1 = V ANd temperature be T1 = T Final volume, V2 = 0.60…

Q: A cube of each of the following that measures 2.36cm on a side is brought from 5.7 oC to 28.3 oC…

A: Given: The side of the cube is 2.36 cm. The initial temperature of the cube is 5.7 °C. The final…

Q: What is the change in temperature of 2.2 kg of the following substances if 8.5 x 10^3 J of thermal…

A: Hi, you have submitted multiple subpart questions and it is not specified which parts you need help…

Q: Why is there a need to constantly stir the metal shots during heating?

A:

Q: the mass of air in the hail.

A: Given; The dimension of hail are,  ⇒10m×7m×5mDensity of air=1.11 kg m-3Find the mass of air in the…

Q: What percentage of an iceburg is below the surface of the water?

A: As we know that:-  Density of ice=0.9gm/ml(approx) Density of water=1gm/ml

Q: Tents are coated with thin layer of aluminium hydroxide. Why?

A: Tents are coated with a thin layer of aluminium hydroxide because aluminium hydroxide is insoluble…

Q: A technique that uses a moving liquid phase and a stationary solid phase to separate mixtures is…

A: The technique used to separate on the basis of polarity difference is known as chromatography.

Q: The photo shows physics teacher Marshall Ellenstein walking barefoot on broken glass bottles in his…

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Q: 3. Baby Oil (Method A) mass of the sample of baby oil in the tube when tube is filled density of the…

A: Density of a substance = MassVolume Mass= 61.05 g Volume of tube = (NOT PROVIDED in Question)…

Q: Convert grams to kilograms 50 grams 100 grams 91 grams 127 grams 118 grams 143 grams 152…

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Q: Your friend is 2.70 m away from you in a room. There are no significant air currents. She opens a…

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Q: If you add oil to the water,what will happen?Will it create a single homogeneous phase or will it…

A: When oil is add to a water, oil doesn't mixed with water.

Q: Water can be sprayed easily when soap is added to it, Why?

A: Because addition of soap decreases the surface tension of water. The energy for spraying is…

Q: Supposed you had a mixture of iron pellets, pebbles, and small wood spheres, all of which were about…

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Q: How many calories are needed to change 6 grams of ice into water? 480 calories 6 calories 3240…

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Q: Cooking utensils are provided with wooden handles, Why?

A: Wood is a very poor conductor of heat energy, means that heat energy from cooking pan cannot…

Q: What is the mass of 0.7 mole of CO2 (in g)? A) 31 B) 7 C) 26 D) 18 E) 37

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Q: When can you say that a chemical system is a substance or a mixture?

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Q: If no molecules in a body could escape, would the body have any odor?

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Q: Which is NOT a pure substance? 1. air 2. sucrose 3. copper wire 4. helium

A:

Q: One component of a metal sculpture consists of a solid cube with an edge of length 36.9 cm. The…

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Q: A chemical in a measuring cylinder exerts a pressure of 2.66 x 104 Pa at a depth of 20.0 cm. If the…

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Q: What is the mass of a piece of silver that has a density of 21.9 g/mL and a volume of 22 mL? O1.00 g…

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Q: what happens when you put the glass inside the glass of water

A: What happens when you put the glass inside the glass of water.

Q: What is the effect of increase in pressure on the boiling point of a liquid?

A: When the pressure applied to the liquid surface is increased, the energy needed for the liquid…

Ideal Gas Law

Ideal gas law states that the product of pressure and volume of a gas directly varies with the product of the number of moles, the universal gas constant, and the temperature of the gas.