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How can gas and a precipitate formation be united under one heading?
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What observations does not indicate that a chemical change has occurred a. change of state b. formation of a precipitate c. absorption of energy d. release of a gas?
acually the answer depends on the nature of chemical reaction under consideration and depending on the reaction, there are two possible answers: a change of state and absorption of energy.
Why look for black precipitate in the butt instead of on the surface of an H2S test?
The black precipitate usually sink to the bottom which the reaction took place in. The reaction takes place at the bottom because it only occurs under anaerobic conditions, and it does not sink to the bottom as it only occurs at the bottom, not around oxygen at the top of the tube.
What is the theory of the formation and movement of the plates that cover the earth's surface?
the movement and formation of the plates or continents is caused by conduction under the crust.
What is matter from a nebula that has begun to condense under the weight of gravity to begin the formation of a star?
Matter from a nebula that has begun to condense under the weight of gravity to begin the formation of the star is "dust and gas".
Any formation in which groundwater rises on its own under pressure is called?
artesian
Is formation of a precipitate an indication of a chemical change?
One example is the reaction between the aqueous solutions lead nitrate, Pb(NO3)2 and potassium chloride, KCl. They react to form solid (a precipitate) lead chloride, PbCl2, and aqueous potassium nitrate, KNO3. The balanced equation is Pb(NO3)2(aq) + KCl(aq) ---> PbCl2(s) + KNO3(aq)
Under what conditions does a precipitate form in a chemical reaction?
When a precipitate forms, cations and anions in aqueous solutions combine to form an insoluble ionic solid. This is specifically classified as a double replacement reaction and takes the form AB + CD --> AD + CB.
What are three observable signs to identify a chemical change?
chemical change doesn't apper outside easily as it is change in the chemical property of the element or the experiment done,specific methods can only be used to detect the chemical change for the substance under observation.
Which main section does the heading Short Answer fall under?
The heading "Short Answer" typically falls under the "Written Response" main section.
What is the difference between a heading and a caption?
A heading is like the name of a section. A caption is a description under a picture of what the picture is about.
In what career do you design buildings?
this comes under the heading of "Architect"
Which main section does the heading short fall under?
Activities & Essays.
Under what heading did the social programs of the 1930s come?
new deal
What observations does not indicate that a chemical change has occurred a. change of state b. formation of a precipitate c. absorption of energy d. release of a gas?
acually the answer depends on the nature of chemical reaction under consideration and depending on the reaction, there are two possible answers: a change of state and absorption of energy.
What is the Dewey decimal system for subject heading Victorians?
In the Dewey Decimal Classification system, books about the Victorians would generally fall under the category 941.081 – history of Victorian era in the United Kingdom.
What main section does the heading Declared Major fall under?
Educational Data
Which main section does the heading Parent Information fall under?
Personal Information.
