A student analyzed an unknown sample that contained a single anion. The sample gave a white precipitate upon addition of a solution of AgNO3 which dissolved in ammonia. Which anion is present in the unknown solution? Write the corresponding net ionic equation.
Answers
Answer:
Chloride ion
Explanation:
The anion present in the unknown solution would be chloride ions.
A white precipitate of silver chloride is usually formed when drops of silver nitrate are added to a solution containing chloride ions. The ionic equation is as below:
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Answers
The potassium nuclei have been unstable and results in the spontaneous decay without any external force. Thus, option 3 is correct.
Potassium has been the metal of group 1 of the periodic table. It has been consisted of 19 protons and 20 neutrons in the nucleus.
Decay of potassium nuclei
The nuclei decay has been achieved when there has been loss of the protons in the nuclei, resulting in the radioactive isotopes.
The potassium nuclei have been unstable and results in the spontaneous decay without any external force. Thus, option 3 is correct.
Learn more about potassium nuclei, here:
In general though, the potassium atom has 19 protons, and has 1 valence electron in the 4s orbital. The nucleus of the atom contains 19 protons and (21 neutrons on average.) If we were too apply the laws regarding the band of stability then that ratio is very stable and it is very unlikely (less than 10^-21%) that the nucleus would ever go through any form of decay.
A) 64.5%
B) 88.6%
C) 81.5%
D) 92.8%
Answers
Answer:
B) 88.6%
Explanation:
Percent yield equals actual yield divided by theoretical yield
actual yield is 31.0g
theoretical yield is 35g
percent yield was 88.57 which rounds up to 88.6%
Answers
Heat capacity of the chunk of silver = 42.8 J/c
Mass of the silver = 181 g
Now we also know the formula for determining the specific heat of silver and that is
Specific heat (C) = heat capacity/ mass
= (42.8/181) J/gC
= 0.24 J/gC
So the specific heat of the silver is 0.24 J/gC.
With the given known facts, it is easily possible to find out the specific gravity of any substance.
sample was gray, non-metallic, had
density of 3.8 g/mL, and a volume
of 48.3 mL
Of the observed properties listed
below, which is considered to be an
extensive property?
A Gray
B Metallic
C Density
D Volume
Answers
Answer:
D. Volume
Explanation:
Properties mentioned in the question;
colour = gray
Nonmetallic
Density = 3.8 g/mL
Volume = 48.3 mL
Of the mentioned, which is extensive ?
Extensive properties are those properties that are proportional to the amount of substance present.
The correct option is D. Volume. The other properties do not change with increasing or decreasing amount of the mineral
Final answer:
Volume is considered to be an extensive property.
Explanation:
The extensive property out of the observed properties listed is volume. An extensive property is one that depends on the amount of a substance. In this case, the volume of the mineral sample is directly proportional to the amount of the sample, so it is considered an extensive property.
Learn more about Extensive property here:
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