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LekaFEV [45]
3 years ago
12

Is many sig figs are in 0.092

Chemistry
1 answer:
Verdich [7]3 years ago
6 0
There are 2 sig figs in 0.092
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Which of these describes an exothermic reaction?
Paul [167]

A nswer: -

C. Energy is released by the reaction

Explanation:-

An exothermic reaction is one in which during the progress of the reaction heat is evolved.

So energy is released by the reaction.

It cannot be created as energy is neither created nor destroyed as per the Law of conservation of energy. Energy is not transferred either.

The energy released during the progress of the reaction originates from the chemical bonds of the reactants as they break during their conversion into products.

3 0
3 years ago
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A solution contains the ions ag+ , pb2+ and ni2+. dilute solutions of nacl, na2so4 and na2s are available to separate the positi
sladkih [1.3K]
 <span>Use the sequence E (NaCl, Na2SO4, then Na2S). Silver is insoluble as a chloride, so it would be removed first, the others (Pb and Ni) are soluble as chlorides(Note; lead chloride is soluble as a hot solution but will ppt when cold), next, PbSO4 is insoluble but NiSO4 is soluble so use Na2SO4 to separate lead from nickel. Lastly, nickel sulfide is insoluble and can be separated and collected.

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3 years ago
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When weather starts to average out in a pattern over many years, like 30 years, scientists can calculate the average weather con
meriva

Answer:

the earth is different in all places

Explanation:

6 0
3 years ago
calculate the atomic mass of carbon if the two common isotopes of carbon have masses of 12.000 amu (98.89% abundance) and 13.003
Bingel [31]

12.01 amu

Work:

(12.000 × .9889) + (13.003 × .0111) = 12.01

  • turn the precents into decimals

6 0
3 years ago
Students observe that in the presence of sunlight, silver chloride (AgCl) will react and create chlorine gas (Cl2) and leave beh
oksano4ka [1.4K]

Answer:

(B) 2AgCl + sunlight → Cl2 + 2Ag (decomposition reaction) is correct option.

8 0
2 years ago
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