Cite the evidence that indicates that only physical changes occur when a platinum wire is heated in a Bunsen burner flame. (More than one answer may be correct.)

Q: List the names of the various changes of state for a pure substance?

A: Pure substances in chemistry are those that consist of only one kind of particles. It can be further…

Q: What is the definition of a physical property? What is thedefinition of a chemical property?

A: answer is discussed below :

Q: I still do not understand , mathematically, why this is the system we should use and how it is…

A: The pKa can be taken in the range of pH ± 1

Q: Describing the relationship between the melting time for an ice cube and amount of salt sprinkled on…

A: The freezing point depression is the one that results in lowering of freezing point of the pure…

Q: 1. Universe is composed of system and surroundings A.True B. False

A: System: System is defined as any specified portion of matter under study which is separated by the…

Q: 4. What is a characteristic property of a pure substance? Is the boiling point of a substance a…

A: Pure substances are substances that are made up of only one kind of particles and has a fixed or…

Q: A student doing the distillation performed in this experiment notices that, while the liquid in the…

A: As per the question asks that boiling temperature is 53 degree Celsius. Thus distillation occurs at…

Q: define mixture and distinguish between mixtures andcompounds;

A: A mixture is a combination of two or more substances that can be mixed together in any proportion.…

Q: 750 mK/s to K/s?

A: Step 1mk/s means “millikelvin per sec” and K/s means ‘Kelvin per sec”Here, conversion of mk/s to K/s…

Q: Write a informative essay about separation of mixtures in Chemistry.

A: Answer - A separation process is a method that converts a mixture or solution of chemical substances…

Q: All moving objects have Kinetic Energy. O True O False

A: we know that Kinetic energy is determined by the equation 0.5•m•v2.

Q: theoretical yielc

A:

Q: Henrietta has a sample of a pure substance in a beaker. She heats the substance to a temperature of…

A:

Q: The following are result of physical change except. a. Hot shower water turning to steam  b. Steam…

A: Physical change are those changes in which only the state of matter changes without changing the…

Q: Identify the following as a pure substance or mixture * xXx

A: Pure substance is defined as the sample containing only one type of molecules of the compound.

Q: an endothermic phase

A:

Q: ______________________ are defined as homogeneous mixtures of two or more pure substances

A: A SOLUTION  is a homogeneous mixture of two or more pure substances.

Q: 18. A(n) is a property of matter one can observe or measure and without changing its identity.…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: Density is a very useful intensive characteristic property of matter. Why?

A: A question to describe about importance of density as the characteristic property.

Q: Define the phases of matter and phase change?

A: The state of matter that is uniform throughout in physical state and chemical composition is known…

Q: Hi, please choose which of the two substances has the property lis

A: 1. Boiling point depends upon mass .           Boiling point  α  molecular mass     2. Soulbility…

Q: An automobile of 3000 kg travels toward north with a constant velocity of 70 km/h . All forces…

A: Force is given by: F=m×a where m is the mass and a is the acceleration.

Q: why are elements and compounds both pure substances?

A: The formation of compounds due to a combination of elements is governed using certain laws. These…

Q: What is matter

A: There are number of things or objects present around us, that is, in our surrounding.  For example,…

Q: A student collected the data shown in the table below during an experiment. Liquid Characteristics…

A: Alcohol thermometer: The Boiling Point of alcohol thermometer is  78 °C, so it is not possible to…

Q: 1. Two pans of water are on different burners of a stove. One pan of water is boiling vigorously,…

A: The amount of energy required to convert some amount of liquid water to gas or steam at constant…

Q: What is the difference between a heterogeneous and a homogeneous material?

A: Homogeneous and heterogeneous material are two classes of materials which differ in their…

Q: What type of system is a covered glass of milk?

A: Solution- type of system is a covered glass of milk.  Its is close system..

Q: How much heat, in Joules, is absorbed by 54 g of water in order to increase in temperature from 18°C…

A: Given that:  Mass of water = 54 g Increase in temperature , t =  (55-18 )oC = 37 oC

Q: Compressible is a classification of matter, where its molecules are existing separately from each…

A: A solid cannot be compressed much because its particles are already very closely packed and there…

Q: Which of the following would be a homogeneous mixture?  A) graphite B) milk C) brass D)…

A: Which of the following would be a homogeneous mixture? The answer is given below with explanation.

Q: Thermal energy is the sum of kinetic and thermal energies that are associated with particles of…

A: thermal energy in molecule are generally internal energy,  heat involved in molecule.

Q: Examine the pictures of the thermometers. The image on the right displays how the thermometer ha the…

A: Generally thermometers are used to measure temperature.

Q: Liquid octane (C8H18), a component of gasoline, reacts with gaseous oxygen to form gaseous carbon…

A: In the balanced chemical equation, number of atoms and charge on either side of the equation must be…

Q: vizualize the connection for the description of motions in the sections and give answer in the blank

A: 1. Scientist who proposed 2. Model name a.) John Dalton     Dalton Atomic Theory b.) Ernest…

Q: wo pans of water are on different burners of a stove. One pan of water is poiling vigorously, while…

A: ANSWERE IS DISCUSSED BELOW :

Q: Blood contains a liquid component and living cells. Would it be classified as a compound or a…

A: Compound is combination two or element in fixed proportion and they cannot separated physical method…

Q: Based on this result, is the woman's drink a pure substance or a mixture

A:

Q: Classify following as pure substances and mixtures – Air, glucose, gold, odium and milk.

A: Given: Air, glucose, gold, sodium and milk

Q: Indicate for the examples below if the change is physical (P) or chemical (C) 1. milk turns sour…

A:

Q: Observe the type of connection in your home. Which are connected in series? Which are connected in…

A: In a house, there are numerous electrical apparatuses that need to run autonomously of one another.…

Q: Give an example of a homogeneous mixture and anexample of a heterogeneous mixture.

A: Mixture : In terms of chemistry, whenever two or more than two atoms/molecules/compounds/substances…

Q: A change of kinetic energy of molecules create what property change in a body?

A: A question based on kinetic energy of molecules, which is to be accomplished.

Q: Q3.4 Reflecting on Differences in Phases Think about what you already know about different phases of…

A: The different phases of matter like solid, liquid and gas can be converted into one another. If  the…

Q: Box A and B are the same size and are connected by an open door. Box A is warmer at one instant in…

A: The given data : The size of both the boxes = same  They both are connected to open door The Box A…

Q: Given the following combinations:   a. a homogeneous liquid mixture of bromine, Br2, and carbon…

A: The question says Which of the pairs is an undissolved mixture of two compounds? Undissolved mixture…