An unknown substance dissolves in water but separates and floats in oil.

Q: The image above shows a student mixing two chemicals. Is she following safe laboratory practices?…

A: We are given an image of a girl mixing two chemicals:

Q: Is paper clip steel more dense or less than water

A: Is paper clip steel more dense or less than water.

Q: Explain what is meant by the salinity of water?

A: Salinity: It is term used to define saltiness of solution. A solution is said to be saline if it…

Q: Oil and water do not mix with each other. But when we add oil into water, oil floats over the water.…

A: Oil do not mix with water as oil is non polar and water is polar molecule and polar dissolve in…

Q: 2. An example of a liquid in solid solution is a. water in air b. zinc in copPper C. mercury in…

A: An example of a liquid in solid solution has to be chosen.

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: In a common laboratory experiment in general chemistry, students are asked to determine the relative…

A: To find: A method for separating two compounds of the given mixture.

Q: how would you seperate a homogeneous solution of table salt and water into its components?

A: Evaporation: It is the process, which involves transformation of liquid water to water vapour.

Q: Using the Identification of Substances by Physical Properties table in the question above, when…

A: The answer is explained below.

Q: 16. A doctor has ordered that a patient be given 30.00 dg of glucose, which is available in a…

A: (16) Given that -  Mass of ordered glucose = 30.00 dg  Concentration of glucose available = 20.00…

Q: A solution is made by dissolving 8 grams of a salt in 100 cm³ of water (density = 1 g/cm³). Assuming…

A: Given: Mass of salt = 8 gm Volume of water = 100 cm3 Density of water =  1 g/cm3 We know that,…

Q: When blue food coloring is dissolved in water, the result is a ________? a. homogeneous mixture…

A: When particles moves from higher concentration to lower concentration than diffusion occurs. The…

Q: Assume that 5.95 g of benzoic acid dissolves in hot water. 8.88 g of benzoic acid are added to 100…

A: The amount of benzoic acid that gets dissolved in hot water is provided.

Q: When determining the density of a pure liquid or a solution, the temperture of the sample must be…

A: The volume of liquids will increase with increase in temperature.

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

A: Based on the given statement we need to define what type it is.

Q: Mixture of water and AMMONIUM CHLORIDE is an example of Homogeneous mixture

A: A mixture, whose composition is uniformly distributed throughout the mixture is said to be a…

Q: When determining the density of a pure liquid or a solution, the temperature of the sample must be…

A: Density of a substance is the ratio of its mass and volume. It is a measure of mass per unit volume.…

Q: Write a balanced equation for the combustion of gaseous methane (CH,), a majority component of…

A: A chemical equation is the simplest and easiest way to write the chemical formula of each of the…

Q: Which of the following is a physical change?   a. Ice melting into liquid water   b. Sodium…

A: Physical changes are changes affecting the form of a chemical substance, but not its chemical…

Q: A process that may be applied to a mixture of two substances which sublime closely together *

A: Given statement is : A process that may be applied to a mixture of two substances which sublime…

Q: What information is important to those who will be analyzing the samples?

A: Various types of analysis of compounds are performed in chemistry. These analysis helps in finding…

Q: To mix a cleaning solution, 25 mL of concentrated cleaner is added to 625 mL of distilled water.…

A:

Q: Question attached

A: The quantity of moles of solute that is present in one liter of solution is molarity. The formula to…

Q: How did the number of phases of the components help you classify the mixtures OF water,pepper,flour…

A: Phases- A phase is defined by as any homogeneous and physically distinct part of a system which is…

Q: A humidifier located at a nursing station holds 4.00 galloons of water . How many fluids ounces of…

A:

Q: 1. When sugar and sulfur are mixed with water, they behave differently. Which of these can be…

A: When sugar and sulfur is mixed with water, which of these can be removed with water filtration..

Q: The following particulate-level diagram best represents a(n).

A: We are given a particulate-level diagram as follows:

Q: If salt dissolves in water, is it a chemical or physical change?

A:

Q: Use the table and graph below to answer Questions 2–6. 2. What must be a constant during the…

A: Hi, since you have posted multiple questions. We will answer the very first question for you. Kindly…

Q: give a particulate-level explanation of why ice (solid water) is less dense than liquid water?

A: Density of ice     = 0.9168 g/cm3 Density of water = 1.00g/cm3 Density gives the measure of how…

Q: Ethanol Oil and Water Water A student combines equal volumes of ethanol and water in a beaker and…

A: The two correct statements has to be decided.

Q: the sucrose concentration in the remaining 300 mL

A:

Q: The diagram represents a solution an element a compound a heterogeneous mixture

A: In this question, we will Identify this give diagram represent , a solution or a Element or a…

Q: A mixture of spaghetti and water is separated using a strainer, a physical method of separation.…

A: Filtration : It is the process of separating solid matter from the fluid one using a structure…

Q: Which of the following is a pure substance that can be broken down into simpler substances by…

A: Solution: It is a homogeneous mixture of two or more components that are uniformly distributed…

Q: What is the mass of ethanol alcohol present in vodka if it is stated as 80 proof ? Assume: Density…

A: Density of alcohol is equal to the mass of alcohol divided by its volume. Write the expression of…

Q: When determining the density of a pure liquid or a solution, the temperature of the sample must be…

A: Density is obtained by dividing the mass to the volume. Density of gases is lower than that of the…

Q: A 24.5g sample of solution has a density of .768 g/mL. What is the sample volume in mL?

A: Density :- Density of a substance is its amount           of mass per unit volume . So , density…

Q: a) Define melting point. b) Is melting point a physical or chemical property of matter?

A:

Q: Consider three 10-g samples of water: one as ice, one as liquid, and one as vapor. How do the…

A: The volume of solid and liquid phase of water can be calculated by the expression given in the…

Q: A mixture of copper and tin, commonly called bronze is a homogeneous mixture or a ____________…

A: Given : A mixture of copper and tin, commonly called bronze is a homogeneous mixture.

Q: Directions: Match the following terms in column A to the description that matches them in column B.…

A:

Q: Convert 270 miles per second to centimeters per day. Show solution

A: Given : Speed in miles per second = 270 mil/s The conversion relationships that will be used are 1)…

Q: 13. The following substance(s) does(do) not dissolve in water. A. cooking oil B. sugar C. salt D.…

A: Oil cannot dissolve in water because oil molecules repel water molecules. Because water is…

Q: Which of the following is a method for separating a solid-liquid mixture?

A: Applying concept of separation of liquid- solid mixture by filtration.

Q: Lulu mixes a solution of vinegar for a homemade salad dressing she is making. She makes 300 ml of…

A:

Q: A homogeneous mixture composed of a solute and solvent________?

A: Homogeneous means having similar composition or state.  Simply, we cancnot differentiate between the…

Q: A 45% sucrose solution lost 240 mL by evaporation. After evaporation what is the sucrose…

A: The concentration of the sucrose solution is = 45 % The volume of the solution is = 240+300 = 540 mL…

Q: What are the possible errors in using gravimetric method to determine the mass of total solids in…

A: Solution: In gravimetric analysis method there are two major errors viz personal errors and methodic…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.