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Tcecarenko [31]
3 years ago
5

Which of these is an example of formation of a substance with a different identity

Chemistry
2 answers:
Anna71 [15]3 years ago
8 0
Uhmm, a hard one High School.. . I will have to go with B:sieving flour and spices.
Anit [1.1K]3 years ago
7 0

Answer:  

Mixing sand in water.

Explanation:

MIxing of sand in water is an example of formation of a substance with a different identity. The sand sinks to the bottom in this mixture that's why it is a heterogenous mixture. A heterogenous mixture is a mixture that is not uniform in composition and it includes different substances like solid and  liquid mixture.

While other options are may be homogenous mixture and diluted solution which have same composition and may also have same phase like liquid to  liquid and powder to powder.

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Balance the following reaction in acidic solution:. . Ag(s) + NO3-(aq) -> Ag+(aq) + NO(g)
nekit [7.7K]
The two half-reactions are...
Ag→Ag+
and...
NO3→NO
Let's start by balancing the first half-reaction...
Ag→Ag+
The amounts are already balanced; 1:1. The oxygens are balanced. So all that's left is to balance the charge...
Ag→Ag++e−
Now let's do the other equation... Amounts of nitrogen are balanced, so we first need to balance the oxygens...
NO3→NO
4H++NO3→NO+2H2O
Next, we need to balance charge...
4e−+4H++NO3→NO+2H2O
Now let's go ahead and rewrite each half-reaction after being balanced by themselves...
Ag→Ag++e−
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Now we need to multiply by some factor to get the electrons to cancel out. In this case, that factor is 4, which needs to be applied to the top half-reaction...
4(Ag→Ag++e−)=4Ag→4Ag++4e−
Then we combine this half-reaction with the second one above to get...
4Ag+4H++NO3→4Ag++NO+2H2O
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At a certain temperature the vapor pressure of pure heptane C7H16 is measured to be 454.mmHg. Suppose a solution is prepared by
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Answer:

Mass of heptane = 102g

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