Experiment: distillation and hardness of water

Q: 2. A solution of salt in water is a compound. heterogeneous mixture. a. b. homogeneous mixture. с.…

A: Homogeneous mixture : It is a mixture in which composition is uniform throughout the mixture.

Q: ASSERTION: The solubility of all gases in water decreases with the rise in temperature. REASON: The…

A: The solubility of gases in water is inversely proportional to temperature because if the temperature…

Q: Give picture of example of particulate matter in ocean.

A: Particulate matter is a mix of solids and liquids, including carbon, complex organic chemicals,…

Q: Which of the following is not a chemical change? A. burning coal B. making bread rise using baking…

A: A chemical change is a change in which the initial compound is having different structure or formula…

Q: chocolate candy compound and contituent elemen

A: chocolate is a food product which is made from roasted  and ground cocoa pods

Q: Questions 1. What term is used to describe the phase change observed when iodine crystals are heated…

A:

Q: 4. Vinaigrette dressing with herbs is classified as a/an a. element 5. Tears is classified as a/an…

A: (4) Vinaigrette dressing is a process in which dressing or mixing of vinegar and oil take place ,…

Q: Which of the following is a pure substance existing as different phases in a heterogeneous system?…

A: The correct option is as follows:

Q: Name the three most common states of matter on Earth. Physical properties can be divided into two…

A: Matter is anything which occupies space and have mass. There are three states of matter which are…

Q: Suppose you mixed/combined calcium oxide and water. How will you be able to separate it afterwards?

A:

Q: What is a solid dispersed in either a solid or liquid?

A: Solid dispersed in either a solid or liquid is called:

Q: How do you know a physical change has occurred when evaporating water produces gaseous water? A A…

A: Physical change : Here, no permanent change occurs. This means no new compound is generated. Here,…

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

A: The answer is explained below.

Q: How can a liquid be distinguished from a fine powder? What type of experiment or observation might…

A: Both are made up of small particles. Perhaps the particles in a powder are larger than those of a…

Q: a) Which of the following is the lowest temperature? a) 42 C b) 318 K c) 57 F d) all these…

A: The solution requires unit and dimensional analysis .

Q: Write a descriptive information about Filtration and Evaporation.

A: Filtration and evaporation  are separation methods. These separation methods are used to separate…

Q: Cookies baking in the oven give off a delicious aroma. e) A match is struck and ignites. f) Bleach…

A:

Q: Is a change in phase a physical change or a chemical change? Explain.

A: A physical change is a reversible change whereas chemical changes are generally irreversible. No new…

Q: Describe the energy changes that accompany changes of state

A: Transferring energy to or from a substance can change its state.

Q: Water is a substance that exists in all the three states of matter. What do you call when a…

A: Physical change -  A change in the appearance, shape and size of a substance without a change in its…

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: A new linear temperature scale, degrees Zunzol (Z), is based on the freezing point and boiling point…

A: Given, Freezing point of zunzol =141.5°C Boiling point of zunzol =-24.8°C Let the freezing point on…

Q: Weight of vinegar sample= 8.2000 g Volume of vinegar sample= 10.00 mL Volume of NaOH used= 24.30…

A: Normality is defined as the amount of solute expressed in the number of gram equivalents present per…

Q: 5:03 Question 12 of 12 Submit Why is the dissolving of sugar in water a physical change? A) the…

A:

Q: There are ___________ degrees Fahrenheit between thefreezing and boiling points of water.

A: The number of degrees (in Fahrenheit) between freezing point of water and boiling point of water.

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: solids are completely melted). 2) Fill in the table below. LIQUID Chocolate Butter Ice 3) What have…

A: Note: Since you have posted a question with multiple sub-parts, we will solve the first three…

Q: 10. The following is a homogeneous mixture A. 70% isopropyl alcohol B. 100% isopropyl alcohol CES…

A:

Q: What is the term for the modification of a substance that does not alter its chemical composition?…

A: Chemical change: In chemical change composition of the substance changes. When bonds are broken and…

Q: Sugar-water solution Sand ethod to separate the sand from the other substances in the

A: As we know,  sand form heterogeneous mixture with water.  So, we can separate mixture by simple…

Q: Is hydroelectric acid reacts with potassium hydroxide to produce a slat water and heat a physical or…

A: In chemical reaction two or more species react and form new species known as products.

Q: A muffin recipe calls for 34 cup of sugar for every 12 teaspoon of salt. How much salt should be…

A: In this question we need to calculate the amount of salt needed for 1 cup of sugar

Q: What buret volume should be reported? Enter a value without units.

A: curved surface at the top of liquids known as meniscus If the meniscus is a concave meniscus, read…

Q: 18. How many elements are liquid at room temperature? Name them.

A: The elements which are liquid - Rubidium, Francium, Gallium, Mercury, Bromine.  But we know room…

Q: Heating Sugar #6) Decomposing Sugar Continued Heating Circle whether it is a Chemical or Physical…

A:

Q: 7. A student combines pure NaCl (sodium chloride) with pure DI water. The resulting is an example…

A: Given process,            Mixing of pure NaCl with pure DI water. a. homogeneous mixture          b.…

Q: 13 What occurs within the beaker as the teacher mixes the vinegar and milk? A A chemical change that…

A: Multiple choice questions are answered with explanation.

Q: Direction: Recall the properties and behavior of the three states of matter by answering the…

A:

Q: Gasoline is composed of a variety of different liquid hydrocarbons, which do not separate as time…

A: Gasoline is composed of a variety of different liquid hydrocarbons. These hydrocarbon does not…

Q: How many water particles surround a calcium ion? I’m trying to draw a particle representation of…

A: Calcium ion Ca2+ mostly shows co-ordination number of 6 , 7 , 8 . 80% of calcium co-ordination…

Q: Mixture of water and sand is an example of Heterogeneous mixture Select one: True O False

A: its A True

Q: Part A- Does a liquid release energy or absorbs energy when it changes to a solid?(think of when…

A: During phase changes, energy is either released or absorbed by the substances involved. Here, the…

Q: What a substance that cannot be broken into simpler substance by a chemical change.

A:

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.