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...here is how you should approach this: 1 . The loss of mass of the sample after...sample. 2. Converting that mass to moles H2O and dividing...mass NaCl / mass sample) X 100 give you % NaCl in the sample...

2 Answers · Science & Mathematics · 20/09/2020

... buffer. So, you need 1 /10 of the final volume, or 10 mL... = M2V2 0.5 (V1) = 100 (0.075) V1 = 15 mL ...cylinder and add 50 mL or so of water to it. Pipet into that the 10 ...

1 Answers · Science & Mathematics · 17/09/2020

Reactions to consider .. ( 1 ) 2 NaHCO3(s) ----> Na2CO3(s) + H2O(g) + CO2(g).. .. 80°C < T < 100 °C .. (2) 1 Na2CO3(s) ----> Na2O(s) + CO2(g...

2 Answers · Science & Mathematics · 18/09/2020

...of (NH4)2HPO4 = x*12.7/ 100 = 0.127x mass of nitrogen in CH4N2O...of nitrogen in KNO3 = 14/101. 1 * 0.277x = 0.04x grams... of fertilizer = 7.07 grams to provide 2.70 grams of Nitrogen...

1 Answers · Science & Mathematics · 16/09/2020

... is 1 .838g moles of CaCO3 = 1 .838g / 100 .0 g/ mol = 0.01838 moles from the nett equation we...115.9 g / mol the CO3 contributes 60 g to the molar mass so mass of M2 = 55.9 g mass of ...

1 Answers · Science & Mathematics · 13/09/2020

... = nRT / V = (( 1 .0 g H2O) / (18.01532 g...mol) x (70 + 273) K / (0. 100 L) = 11874 mmHg..., the graph seems to show that the vapor pressure of.... (But I do not trust this graph for water since...

2 Answers · Science & Mathematics · 10/09/2020

let me show you the light .. ( 1 ) write chemical equations assume temp &...of what chemicals? .. (3) convert mass lost to mass NaHCO3 .. . . .hint.. look at ...4) mass % = mass NaHCO3 / mass total * 100 %

1 Answers · Science & Mathematics · 03/09/2020

... point of water = 100 °C Boiling point of the solution = ( 100 + 1 .02)°C = 101.02 °C

1 Answers · Science & Mathematics · 26/07/2020

...dissociation = (4.17*10^-3) / 0.10 * 100 % = 4.17% Question... , Ka = 1 .8*10^-5 Answer: you have seen above how to use the Ka equation...you should have no problem with doing the rest yourself – but...

2 Answers · Science & Mathematics · 24/07/2020

..., we need to divide by 8: ( 1 /8)*4.00 * 10^-3 mol = 5.00*10^-4 mol. Finally, we need to multiply by the molar mass of ...: 0.800 g HF / 8 = 0. 100 g. When doing this type of calculation, we always...

1 Answers · Science & Mathematics · 15/07/2020

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