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A student carried out a reaction below starting with 1.993 g of unknow (X2CO3), and found that the mass loss due to Co2 was 0.593g. X2CO3 (s) + 2 HCL (aq) -> 2 XCL (aq) + H2O (l)+ CO2 (g)
How many moles of CO2 were produced?
How many moles of X2CO2 were consumed?
What is the molar mass of X2CO3?
What is the molar mass of the alkali metal X?
What is the identity of X (Lithium, Potassium, or Sodium)? Justify your answer.
Potassium hydroxide is used to precipitate each of the cations from their respective solution. Determine the minimum concentration of KOH required for precipitation to begin in each case
Predict the type of substitution mechanism, predict which reaction of the pair will occur at the faster rate, and draw the correct organic product.
Calculate the fraction of atoms in a sample of argon gas at 391 K that have an energy of 12.7 kJ
Problem- Draw the structures of salicylic acid and aspirin. Circle and identify three functional groups present in each compound.
CELL CHEMISTRY
The water treatment plant uses filters that are 10 ft in diameter. If the filters are backwashed at 15 gpm/ft2 for 12 minutes, estimate the amount (gallons per wash) of wash water used.
As a result, the A students end up with Bs and the F students get Ds. How would this redistribution affect the incentive of students to study and learn?
An aqueous solution of iron (III) chloride reacts with magnesium solid to give solid iron an aqueous magnesium chloride. Write the balanced equation for this reaction.
What mass of grams of KNO3 will crystallize out of solution if exactly 475.0 g of its saturated solution at 75 celsius is cooled to 25 celsius?
Indicators change colors over about 1-1.5 pH units. For bromthymol blue, the pKa is about 7.0. Estimate the pH range over which the color change occurs for bromcresol green indicator.
A 50.00-mL sample of groundwater is titrated with 0.0800 M EDTA. Assume that Ca2 accounts for all of the hardness in the groundwater. If 12.80 mL of EDTA is required to titrate the 50.00-mL sample, what is the hardness of the groundwater in molari..
A gaseous system undergoes a change in temperature and volume. What is the entropy change for a particle in this system if the final number of microstates is 0.808 times that of the initial number of microstates
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