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How do you think the stain changes the sample?
A stain is the result of an interaction between substances.
What has more chemicals helium or air?
Air has many more different substances than helium, which is a single substance. Outside air contains helium.
What is the chemical structure of an air fresher?
An air freshener is a mixture of many chemical substances, so there is no definitive chemical structure for an air freshener.
What substance physical properties depend on the composition?
A characteristic property is a chemical or physical property that helps identify and classify substances. The characteristic properties of a substance are always the same whether the sample you are observing is large or small.
How many milliliters of nitrogen and oxygen are in a one liter sample of dry air?
781ml of N2 and 209ml of O2
What can be observed only when the substances in a sample of matter are changing into different substances?
chemical change
How does properties can be observed only when the substances in a sample of matter are changing into different substances?
Chemical properties
What are the two methods to cool down substances?
- place a sample in a refrigerator- place a sample in liquid nitrogen
Is clean unpolluted air is a pure substance?
No because our air we breath is not only oxygen it have many substances
When can chemical properties be observe?
chemical properties can be observed only when the substances in a sample of matter are changing into different substances
What condition can chemical properties be observed?
Chemical Properties can be observed only when substances in a sample of matter are changing into different substances.
Which substance in the air is the solvent and which substances are the solutes?
Moisture in the air works as solvent and soluble substances present in the air are solutes.
Sample of a hydrosphere?
air
How do you think the stain changes the sample?
A stain is the result of an interaction between substances.
What has more chemicals helium or air?
Air has many more different substances than helium, which is a single substance. Outside air contains helium.
What is the chemical structure of an air fresher?
An air freshener is a mixture of many chemical substances, so there is no definitive chemical structure for an air freshener.
Why is it important to perform tests on a control urine sample not containing any chemical substance?
It is important to perform tests on a control urine sample not containing any chemical substances, a test result on a known quality can assist you in finding the unknown qualities of a urinary sample containing chemical substances. It also can validate any positive results you get with your test sample.
