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

Q: Why is it necessary to use a small diameter, thin-walled capillary for holding the sample in the…

A: Solution:

Q: How many moles of KI are in 9.06×10^24 formula units?

A: nmoles=NNAvagadro

Q: Calculate the y-component of the center of mass of the following molecule. Answer in Angstroms (Å),…

A: Center of mass is a coordinate point in space where ideally whole of the mass of the a system of…

Q: Physical or Chemical change? O neither O both O physical O chemical

A: Introduction: Physical change: Physical change is the change in size, shape, or state of the…

Q: A sample of pure aluminum has a mass of 10.1 g. Calculate the HINT (a) moles in the sample moles (b)…

A:

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: What is the physical law for obtaining the law of exchange by addition?

A: Associative law of addition a + (b+ c) = (a + b) + c

Q: 20. fill in the blanks in the following table for the compound carbon dioxide, CO2 Moles Molecules…

A: We know, Molecular weight of CO2 is 44 g

Q: 1) It is a large particle formed by the combination of two or more atoms. 2) It is the ratio of mass…

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

A: As we know,  The number of molecules in a mole is NA, called Avogadro's number.  1 NA = 6.02 x 1023…

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: name of the substance?

A:

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

A: The odour is due to molecular diffusion, hence if the molecule could escape, the body will have…

Q: Determine the following products using the correct sign: 1.11. 1.2J.=.. 1.3 jxk=.. 1.4-4xk

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Q: A molecule of mass 89.3 atomic mass units moving at 0.80 km/s to the right, and another molecule of…

A: Answer: 0.6 km/s

Q: Name the device used for measuring the mass of atoms and molecules.

A: Mass is the net quantity of the matter that is present in any object. The mass of the object remains…

Q: Estimate the time needed for a glycine molecule (see Table 13 – 4 in the textbook) to diffuse a…

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Q: Just wanted to ask why you used Cosine Law?

A: In given question dot product  (1) dot product leads → cosine law (2) cross product leads →sine…

Q: A substance that heats up relatively quickly has a O low specific heat. many strong molecular…

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Q: Four moles of hydrogen sulfide, H,S, would consist of how many molecules? molecules

A: Given Data Number of moles n= 4 mol

Q: How would you measure the density of rock candy, which is irregularly shaped and water soluble?

A: As we know that the density can be calculated as, Density=massvolume

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: Vhat is the number of moles of atoms in 9.03 x 1024 atom: OA. 4.42. mol O B. 9.03 mol O. 1.51 ol O…

A: Given: The number of atoms is 9.03x1024.

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: Collision frequency is not the only factor affecting rate. In the vast majority of collisions, the…

A: Collision frequency is not the only factor affecting the rate. In the vast majority of collisions,…

Q: Analv ze the following statements and determine if it is correct or wrong. 1. SiCl, is a nonpolar…

A: To determine: Whether the given statements are correct or wrong.

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: 1.------- is arrangement of the 1/1 atoms extends only to the atoms nearst neighbors.

A: Answer:- simple cubic structure Simple cubic structure is arrangement of the atoms extends only to…

Q: Discuss which contains more atoms: 1kg of lead or 1kg of aluminium?

A: A mass of 1 atomic mass unit is expressed in units of kilograms as,The mass of one atom of lead is…

Q: Calculate the time required for molecules to diffuse in a liquid a distance of 10^(−3) cm. Assume…

A: Distance travelled, s= 10-3 cm or 10-5 mmean free path, λ=10-8 cm or 10-10 mavg velocity of…

Q: The specific latent heat of vaporization of a particular liquid is 2.0 x 10 Jkg, its relative…

A: Given : Specific latent heat of vaporization, LVH  =  2.0x105J/Kg Relative molecular mass  =  30…

Q: A (deoxyribonucleic acid) is 2.28 µm long. The ends of the molecule become singly ionized: negative…

A:

Q: The energy equivalent of  0.5g of a substance is

A:

Q: A two-component mixture is made up of components A and B with nA=0.11ng. If a small change in…

A: In the given question, We have to calculate the value of change μB.

Q: Why are the temperature and pressure dependent properties in the saturated mixture region?

A:

Q: How does a molecule differ from an atom?

A: Atom is the smallest unit of matter. It is the smallest part an element can divide into. Also, atom…

Q: What is a mixture? Give three examples?

A: The mixtures are formed by mixing the two or more substances with each other without combining…

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: Give a reason why soda drinks should be in plastic bottles rather than in aluminum cans?

A: A typical soda drink may contain acids like citric acid which can react with metallic containers and…

Q: Van der Waals forces can hold inert gas atoms together to form solids at low temperature, but they…

A: Firstly we will discuss the nature of Van der Waals forces, These forces are very weak and short…