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moles of chalk do you have when you have 10 grams before and 8 grams after writing your name?
A 25.0 mL sample of HCL was titrated to the endpoint with 15.0 mL of 2.0 N NaOH.What was the normality of the HCL?What was its molarity
Consider the following reaction.
C6H12O6 + 6O2 => 6CO2 + 6H2O
This equation shows the overall reaction of the process of respiration, which is the set of chemical reactions that give energy to the majority of non-plant life on earth.
If I have 15 moles of oxygen and 7 moles of glucose (C6H12O6) which one will be the limiting reagent and how much carbon dioxide (CO2) will be produced?
C6H12O6 + 6O2 => 6CO2 + 6H2O
This equation shows the overall reaction of the process of respiration, which is the set of chemical reactions that give energy to the majority of non-plant life on earth.
If I have 15 moles of oxygen and 7 moles of glucose (C6H12O6) which one will be the limiting reagent and how much carbon dioxide (CO2) will be produced?
1 g of NaOH was added to 30 cm3 of 1 mol/dm3 HCl. How many cubic meters 0.1 mol/dm3 KOH solution will neutralize excess acid?
What is the pH of 5.0756mg barium hydroxide octahydrate in4.6 liters of water, and the pH of 0.19789g dihydrogen sulfate in 374mL of water both are separate and at 25 degrees C with nothing else present, assume no change of volume and or temp.
"Epsom salts are magnesium sulfate heptahydrate. How many atoms of oxygen are in 8.04g of Epsom salts?" Thanks in advance !
1) A 0.15 L solution of .30 M MgCl2 is mixed with .15 L of .10 M Na2CO3. Calculate the molar concentration of the carbonate ion left after MgCO3 precipitates. What percentage of the carbonate ion precipitated?
2)a)What is the concentration of SO4 just as BaF2 begins to precipitate when 1.0 M Ba(NO3)2 is added to a solution containing .60 M F and .50 M So4? b)What percent of the sulfate ion remains in solution when the BaF2 begins to preciptiate? c)O Would fractional precipitation work to separate BaF2 and BaSO4? EXPLAIN your answer.
2)a)What is the concentration of SO4 just as BaF2 begins to precipitate when 1.0 M Ba(NO3)2 is added to a solution containing .60 M F and .50 M So4? b)What percent of the sulfate ion remains in solution when the BaF2 begins to preciptiate? c)O Would fractional precipitation work to separate BaF2 and BaSO4? EXPLAIN your answer.
If a buffer solution is 0.140 M in a weak acid (Ka = 1.5 × 10-5) and 0.560 M in its conjugate base, what is the pH?
Carol the brilliant laboratory technician, was asked to make up 5 litres of 2M solution of HCL from the concentrated solution. unfortuently she lost her preparation notes and cannot remember the volumes required. The label on the right was scanned from the concentration HCL bottle obtained from the European chemical company Scharlau.
The Two critical pieces of data are:
32% reagent grade which means the chemical has a minimum assay strength of 32% volume per volume
And D=1,15 g/cm3 means the chemical has a density of 1/15 grams per ml
Calculate the concentration of the moles per litre (molarity) of the concentrated solution?
Ps. im having trouble with the volume/ volume bit?
The Two critical pieces of data are:
32% reagent grade which means the chemical has a minimum assay strength of 32% volume per volume
And D=1,15 g/cm3 means the chemical has a density of 1/15 grams per ml
Calculate the concentration of the moles per litre (molarity) of the concentrated solution?
Ps. im having trouble with the volume/ volume bit?
How many moles are in 550 g of CaCO3?
