Hiya! humm...the question? "What sulfide compou nd will yield a black percipitate?" Don't get what that means? oh well.... No point in answering this question if I not gonna say much... okay.......... umm... err... well... Let me think...? I know what a compound is! It's two or more elements that are chemically joined together to make a compound. EASY! To find the difference between an element and a compound is, Element - Has only one Atom and Chemical - Has 2 or more Atoms. Hope this little piece of information can be useful for you? Sorry that I never gave you the answer to the question above. And... Bye :)
Li2S + KCl and K2S + Sn(NO3)4 will yield a black precipitate
Cysteine will yield a positive result with the lead acetate test due to the formation of lead sulfide. Lead sulfide appears as a black precipitate when cysteine is present in the solution.
The equation for the reaction specified is 2 NaOH + H2S -> Na2S + H2O. Therefore, if the yield were 100 %, two formula masses of sodium hydroxide are required to produce one formula mass of sodium sulfide. The gram formula mass of NaOH is 40.00 and that of sodium sulfide is 78.04. The specified number of grams of sodium hydroxide corresponds to 2.53/40.00 or 0.06325 formula masses and therefore would provide half this many formula masses of sodium sulfide, for a mass of (0.06325)(78.04)/2.000 or 2.568 grams of sodium sulfide. Since the yield is specified as 91.0 %, the actual amount of sodium sulfide produced is 2.25 grams, to the justified number of significant digits.
Na + 2S --> Na2S Sodium and Sulphur yield Sodium Sulphide.
To find the percentage yield, you first need to calculate the theoretical yield of CO2 that would be obtained from the given mass of CaCO3. Then divide the actual yield of CO2 (15.4 g) by the theoretical yield, and multiply by 100 to get the percentage yield. The percentage yield is calculated as (actual yield / theoretical yield) * 100.
Li2S + KCl and K2S + Sn(NO3)4 will yield a black precipitate
Cysteine will yield a positive result with the lead acetate test due to the formation of lead sulfide. Lead sulfide appears as a black precipitate when cysteine is present in the solution.
The equation for the reaction specified is 2 NaOH + H2S -> Na2S + H2O. Therefore, if the yield were 100 %, two formula masses of sodium hydroxide are required to produce one formula mass of sodium sulfide. The gram formula mass of NaOH is 40.00 and that of sodium sulfide is 78.04. The specified number of grams of sodium hydroxide corresponds to 2.53/40.00 or 0.06325 formula masses and therefore would provide half this many formula masses of sodium sulfide, for a mass of (0.06325)(78.04)/2.000 or 2.568 grams of sodium sulfide. Since the yield is specified as 91.0 %, the actual amount of sodium sulfide produced is 2.25 grams, to the justified number of significant digits.
Ammonium sulfide reacts with iron(II) nitrate to form iron(II) sulfide and ammonium nitrate. The balanced chemical equation for this reaction is: (NH4)2S + Fe(NO3)2 → FeS + 2NH4NO3. Iron(II) sulfide is a black solid precipitate that forms in this reaction.
how am i suppose to know
"HP has an XL series of ink cartridge, that has capability of producing 750 pages. These high yield black ink cartridges will help prolong intervals between ink purchases."
Na + 2S --> Na2S Sodium and Sulphur yield Sodium Sulphide.
Xerox quality prints at a 4000 page yield.
Bijan Payandeh has written: 'Preliminary yield functions and tables for peatland black spruce in Ontario' -- subject(s): Black spruce 'Yield functions and tables for mixedwood stands of northwestern Ontario' -- subject(s): Mensuration, Forests and forestry 'FIDME-PC' 'Application of basal area index in the yield estimation of boreal mixedwood cover types'
If an engine is running rich, it is receiving and burning too much fuel and that will yield black smoke. If an engine is somehow burning oil, that will yield white smoke.
actual yield multiply by 100 = % yield theoretical yield
If this is the actual yield, real amount produced, then you need the theoretical yield to find the percent yield. % yield = (actual yield / theoretical yield) x 100