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Suppose you wanted to dissolve 106g of Na2CO3 in enough H2O to make 6.00 L of solution.
A. What is the molar mass of Na2CO3?
B. What is the morality of this solution?
What is the molarity of a solution of 14.0 g NH4Br in enough H2O to make 150 mL of solution?
A reaction mixture initially contains 2.8 M H2O and 2.6 M SO2. Determine the equilibrium concentration of H2S if Kc for the reaction at this temperature is 1.3 × 10-6.
If only COF2 is present initially at a concentration of 2.00 M , what concentration of COF2 remains at equilibrium? Express the molar expression numerically
Nitrogen is contained in a 300 ml vessel at 400 mm Hg and 10°C. How many grams of nitrogen are in the vessel?
If 20.0 g acetylene is allowed to completely react with oxygen , how many g of O2 are reacted? 2C2H2 + 5O2→ 4CO2 + 2H2O
How many atoms are there in 0.663 moles of water?
The men's world record for swimming 1500.0 m in a long course pool (as of 2007) is 14 min 34.56 s. At this rate, how many seconds would it take to swim 0.800 miles.
System conducts 1.30x10^2 cal heat to srroundings while delivering 316 cal work. What is the change in internal energy of the system (in Cal).
Determine how many grams of methane is required to form 43.0 grams of CHCl3?
When 27.5 mL of 0.520 M H2SO4 is added to 27.5 mL of 1.04 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate
The temperature of a block of copper metal (molar mass 63.55 g mol-1) fell by 8.52 K when the copper block released 64.5 J of heat. What is the mass of the copper block?
Explain solution of an unknown acid HX, determine that the pH of the solution is 4.00. What is the [H3O+] in the solution?
Using the equation pKa= -log Ka, calculate the Ka from the pH value and the starting acetic acid concentration. Calculate the Ka of acetic acid.
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