If no molecule in a body can escape, would body have any odor?

Q: Is the mass of one mole of N2 greater than, less than, orequal to the mass of one mole of O2?

A: Given:Is the mass of one mole of N2 greater than, less than, or equal toThe mass of one mole of…

Q: How is the boiling point of water affected when some salt is added to it?

A: When salt is added to water, there is dissociation of sodium chloride into sodium and chlorine ions.…

Q: Give evidence that the density of water does not follow that of most substances, when heated.

A: Of course, density of most matter in the earth(not to say universe) depend on temperature. Water's…

Q: Why is soap solution a better cleansing agent than ordinary water?

A: Water although a good general solvent, has a high surface tension. This makes the water molecules to…

Q: When wax is coated on clothes , they become water proof. Why?

A: When there is no wax, adhesive force between cloth and water molecules is stronger than the cohesive…

Q: Many dry cereals are fortified with iron, which is added to the cereal in the form of small iron…

A: The iron particles are separated from the cereal with the help of magnets. we need to grind and…

Q: A ring at a pawn shop is labeled “gold”. The ring has a mass of 4.4 g and a volume of 0.55 cm³. Is…

A: Given : Mass of ring = 4.4 g Volume of ring = 0.55 cm3 Density of pure Gold = 19.3 g/ cm³

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: The density of iron is 8 grams per cubic centimeter. The atomic mass of iron is 56 grams per mole…

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Q: How many moles of atoms are present in 1 mole of water?

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Q: A pure substance made up of the same kind of atoms is called

A: A pure substance made up of the same kind of atoms is called ? we have to answer the above statement

Q: To increase the concentration of a solution, you would O increase the amount of solute O increase…

A:

Q: An irregularly shaped piece of metal of density 7.8 g/cm^3 weighs 429 grams when completely immersed…

A: The weight of an object is the product of the mass and acceleration due to gravity. The mass of the…

Q: Why do metals feel cold even when they are at room temperature?

A: Metals feel cold

Q: Distinguish the same chemical characteristics but have different physical properties?

A: Required : Which have the same chemical characteristics but difference physical properties.

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

A:

Q: Number of molecules in 8.467x10-2 mol C6H6. nificant

A: no of molecules =no of moles of substance(Na)where Na is 6.023x1023 thus,no of…

Q: Diffusion always drives molecules from higher concentration to lower concentration. Oa. True O b.…

A: The kinetic energy of the molecules results in random motion, causing diffusion. In this random…

Q: Three ingredients of black powder are___________,___________, and ___________.

A: Black powder is a mixture which is explosive in nature and used in firearms as well as blasting…

Q: How many oxygen atoms are in 32 moles of CO2?

A: Each mole of CO2 contains 2 moles of oxygen. 1 mole of any substance contains 6.023×1023 units of…

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: Why do some animals curl up into a ball when they are feeling cold?

A: The total energy radiated by a body depends on its surface area . Thus when the animal feel very…

Q: Choose the correct number of molecules in a mole of: Gold VChoose... 197 Water 6.02 x 10 23 18…

A: To find:  the number of molecules in a mole of different elements or compounds

Q: When solid copper and zinc are mixed to form the metal alloy brass, what kind of mixture results?

A: Alloy is formed by mixing two or more materials together. It can be homogeneous or heterogeneous.

Q: Is the stickiness of oranges in our hands can be easily washed with tap water?

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Q: Compare to air sound heard is more in carbon dioxide , Why?

A: The intensity of the sound wave produced in a medium is directly proportional to the density of the…

Q: L/4 3L/4 Select one:

A:

Q: How many grams are in 5.60 x 1024 molecules of NaCI?

A: Given that                        The Molecules of the NaCl is (n) = 5.6×1024 molecules We need to…

Q: A diet decreases a person's mass by 4 % . Exercise creates muscle and reduces fat, thus increasing…

A:

Q: The relative density of a substance is the ____.   A) ratio of its density to the density of water…

A: The relative density of a substance is the ratio of its density to the density of…

Q: What is the mass of 0.75 moles of (NH4)3PO4? O 111.75 g O 121.75 g O 131.75 g O 101.75 g

A:

Q: What is a physical change

A: Physical change can be defined as the change in the physical form of the substance without any…

Q: How do we detect the smell of an incense stick?

A: The particles of hot (after lighting it) incense stick possess large kinetic energy and diffuse in…

Q: Discuss why equal masses of golf balls and Ping-Pong balls don’t contain the same number of balls.

A: Ping-Pong balls have a lower mass when compared to the golf ball. The mass of the atoms and…

Q: Is there any difference between the intensive properties of saturated vapor at a given temperature…

A: The properties of a system which is not depend upon the mass of the system are called as intensive…

Q: When the bottle of carbonated soda is submerged in hot water then let cool to room temperature, why…

A: When carbonated soda is submerged in hot water  then it will start to lose carbonation faster than…

Q: why doesn't the temperature of a beaker of water change during melting or boiling?

A:

Q: Oil rises in lamp wick, Why?

A: The oil in the wick of an oil lamp rises up due to capillary action. This effect is due to surface…

Q: The FDA recommends that adults consume 9 x 10 -4 grams of copper per day to help with enzymes that…

A: Given, the FDA recommends that adults consume w = 9 x 10-4 gm of copper per day to help with enzymes…