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What else can I help you with?
Is a mixture of iron and sulfur a pure substance?
The way you phrase that is a little dubious because no mixture is a 'pure substance'. However, compounds like iron sulphide that are actually bonded together areconsidered pure substances. The elements of a mixture are not united by a chemical change and can (in theory) be separated.
Is it false that the odor of a substance is an example of a physical property?
No, it is true that the odor of a substance is an example of a physical property. A physical property is a characteristic of a substance that can be observed without changing the identity of the substance, and odor fits this definition since it can be perceived without causing a chemical change in the substance.
Is the burning of fuel in a car a chemical or physical change?
Well, isn't that a happy little question! When fuel burns in a car, it undergoes a chemical change because the molecules in the fuel react with oxygen to form new substances like carbon dioxide and water vapor. It's like nature's own magic show happening right in your engine! Just remember, every little change is just a new opportunity for something beautiful to happen.
What does it mean when a substance boils at a higher temperature than water?
It means that the substance has a higher boiling point than water and requires more energy to change from a liquid to a gas. This can be due to stronger intermolecular forces in the substance compared to water.
The process in which atoms are rearranged and chemical bonds are broken and formed to produce a chemical change of a substance.?
Ah, what a beautiful question! That process you're describing is called a chemical reaction. It's like a little dance that atoms do, changing partners and creating new substances. Just like in nature, where everything works together in harmony.
Why wouldn't the temperature of a substance change when heated or cooled?
There are two points for most substances where a phase change takes place. The energy used to rearrange molecules, called the heat of entropy, must be added or removed before the phase can change. The substances show little or no temperature change at some point in this process.
Is perfume a pure substance?
it really depends on the class of perfume it is. the more expensive ones are more natural, while the cheap ones have very little natural substance, and more synthetic substances.
What is important is physical change?
The importance of physical change is that :-1) No new substance is formed.2) It is a temporary change.3) It is easily reversible.4) Very little heat energy is absorbed or given out.The mass of a substance does not alter in a physical change.
Is shredding newspaper a chemical property?
No, shredding newspaper is a physical change because it does not alter the chemical composition of the newspaper. Chemical properties describe how a substance reacts with other materials to form new substances.
What can you infer about density of a substance floats in water?
If a substance floats in water, it is less dense than water. This means that its mass per unit volume is lower than that of water. Substances with lower density will float on top of substances with higher density.
What is the connective tissue that covers bone?
Connective tissue is one which is rich in intercellular substance or interlacing processes with little tendency for the cells to come together in sheets or masses. Ligament is the connective tissue that connect bones to bones .
What connective tissues that connect the muscles?
Connective tissue is one which is rich in intercellular substance or interlacing processes with little tendency for the cells to come together in sheets or masses. Aponeuroses is the connective tissue that connect muscles to muscles .
What is the importance of physical change?
The importance of physical change is that :-1) No new substance is formed.2) It is a temporary change.3) It is easily reversible.4) Very little heat energy is absorbed or given out.The mass of a substance does not alter in a physical change.
Is a mixture of iron and sulfur a pure substance?
The way you phrase that is a little dubious because no mixture is a 'pure substance'. However, compounds like iron sulphide that are actually bonded together areconsidered pure substances. The elements of a mixture are not united by a chemical change and can (in theory) be separated.
What kind of solute has little tendency to become gas?
The solid solutes.
What type of change occurs at the molecular level?
We have already seen that chemical reactions are changes in matter and that they happen everywhere. If you look a little closer and observe your surroundings, you will notice that many of the substances around you are changing. Are all of these changes chemical reactions? No. You know that sometimes chemical changes take place and sometimes physical changes take place. For this reason it is said that A physical change is a change in the properties of a substance that does not change. A change of state is a physical change. A chemical change is a change in the properties of a substance. Combustion is a chemical change You can memorize these definitions, but do you know what we mean by "properties of matter"? When does it change and when does it not? If you can't answer these questions, you don't know how to distinguish between physical and chemical changes. Remember everything you know about the composition of matter, about elements and compounds, about pure substances and mixtures. When we talk about the properties of a substance, we describe its composition and structure, just as we describe what elements it is made of and in what proportions. Regardless of whether it is a single pure substance or a mixture of several substances. You already know that a pure substance is one whose composition is fixed because all the particles are the same, and can be expressed by a formula, such as H 2Or, the chemical formula for water, or NaCl, the chemical formula for sodium chloride, a table salt. When one or more of these pure substances "disappear" in a substance transformation, a chemical change or chemical reaction takes place. But as you know, substances do not disappear (Lavoisier's law). So, from the original atoms that "disappear", one or more new pure substances "emerge". If during the transformation no matter "appears" or "disappears", then a physical change has taken place.
What A steep slope on a phase-change graph indicates?
Different
