9) a. is a form of matter that has a constant composition and properties that are constant throughout the sample.
b. Mixtures can be classified as homogeneous or heterogeneous.
10) mixture (not sure for this one)
Explanation:
7) Pure water is called distilled water or deionized water. In distilled water all of the dissolved substances mixed in water have been removed by evaporation. As water evaporates, it distills, or leaves the salt behind.
8) If we take two or more pure substances and mix them together, we refer to this as a mixture.
9) When we speak of a pure substance, we are speaking of something that contains only one kind of matter. This can either be one single element or one single compound, but every sample of this substance that you examine must contain exactly the same thing with a fixed, definite set of properties but if we take two or more pure substances and mix them together, we refer to this as a mixture. Mixtures can always be separated again into component pure substances, because bonding among the atoms of the constituent substances does not occur in a mixture.
10) A pure substance has a sharp melting point (melts at one temperature) and a sharp boiling point (boils at one temperature) and A mixture melts over a range of temperatures and boils over a range of temperatures.
9. a. set A based on the table from 0 mins. to 15 mins. time interval there is no changes recorded. all temperature in every 10 mins are all the same and nothing was mixed so it is called a pure substance.
b. set B from 0 mins. to 15 mins time interval the temperature of the mixture was increasing every after 10 mins. and it was mixed by salt, the temperature was increasing because of the salt.
10. its a mixture, based on the table substance has the same Temperature from 0 mins to 15 mins. nothing was change while set b which is mixed by salt, the temperature was increasing every after 10 mins.
Answers & Comments
Answer:
7) yes. distilled water is pure substance.
8) yes. it says water with salt.
9) a. is a form of matter that has a constant composition and properties that are constant throughout the sample.
b. Mixtures can be classified as homogeneous or heterogeneous.
10) mixture (not sure for this one)
Explanation:
7) Pure water is called distilled water or deionized water. In distilled water all of the dissolved substances mixed in water have been removed by evaporation. As water evaporates, it distills, or leaves the salt behind.
8) If we take two or more pure substances and mix them together, we refer to this as a mixture.
9) When we speak of a pure substance, we are speaking of something that contains only one kind of matter. This can either be one single element or one single compound, but every sample of this substance that you examine must contain exactly the same thing with a fixed, definite set of properties but if we take two or more pure substances and mix them together, we refer to this as a mixture. Mixtures can always be separated again into component pure substances, because bonding among the atoms of the constituent substances does not occur in a mixture.
10) A pure substance has a sharp melting point (melts at one temperature) and a sharp boiling point (boils at one temperature) and A mixture melts over a range of temperatures and boils over a range of temperatures.
,malaking tulong po ito
Answer:
7. yes because there is no substance being mixed.
7. yes because it is mixed by salt
8. set A
9. a. set A based on the table from 0 mins. to 15 mins. time interval there is no changes recorded. all temperature in every 10 mins are all the same and nothing was mixed so it is called a pure substance.
b. set B from 0 mins. to 15 mins time interval the temperature of the mixture was increasing every after 10 mins. and it was mixed by salt, the temperature was increasing because of the salt.
10. its a mixture, based on the table substance has the same Temperature from 0 mins to 15 mins. nothing was change while set b which is mixed by salt, the temperature was increasing every after 10 mins.