Chemistry, 09.03.2021 22:40 iamabeast51
Lead nitrate + sodium iodide → lead iodide + sodium nitrate
(solution) (solution) (solid) (solution)
Pb(NO3)2 + Nal
pbl₂
NaNO,
26. Explain why the equation shown is not a balanced equation.
Include conservation of matter in your explanation.
Answers: 1
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The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.
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Element j is 1s 2s 2p 3s . (i) how many unpaired electrons does j have? (ii) is j a good oxidizing agent or a reducing agent? (iii) state reason for the answer.
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In what way do investigations build scientific knowledge? the results of investigations lead to questions that cannot be tested. they reflect the opinions and social values of scientists, ensuring valid information. the results of investigations lead to new questions, which lead to new investigations. they are not influenced by the research of earlier scientists, so they are able to address gaps in understanding.i
Answers: 1
Lead nitrate + sodium iodide → lead iodide + sodium nitrate
(solution) (solution) (solid) (soluti...
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