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Given 100 g of hot tea at 90 C what mass of ice at -10 C must be added in order to obtain a final temperture of 10 C
Specific heat of ice=2.09J/g.CSpecific heat of tea=4.18J/g.CNormal freezing point of water = 0C boiling point= 100CDelta H =+6.01 kj/mol for the melting ice
what concentration of aqueous NaCl solution freezes at -15.2 C? the freezing point of pure water is 0.0 C and Kf of pure water is -1.86 C/m.
Suppose you have a glass tube which is 1 m long and 2.5 cm in diameter. Concentrated HCl acid is placed at one end of the tube and concentrated NH3 solution is placed at the other end.
What types of intermolecular forces would you expect to exist among molecules of 1-butanol? (Select all that apply.)
Rank the given solutions in aquous form from lowest to highest boiling point:
Vitamin b6 is needed in the metabolism of amino acids. When it binds to an enzyme it forms a complex with the e-amino group of lysine, which is a primary amine.
calculate the mass of MgCO3 precipitated by mixing 10.0 mL of a 0.200 M Na2CO3 solution with 5.0 mL of a 0.0450 M Mg(NO3)2
256 grams of sodium chloride reacts with an excess of calcium oxide. How many grams of sodium oxide are produced?
The equilibrium point is reached at 120 seconds. After 200 seconds has passed, what is the concentration of sulfates in the drinking water sample.
If copper has a photoelectric threshold wavelength of 279 nm, calculate the velocity (m/s) of the electron emitted when copper is illuminated with light with a frequency of 2.33 × 1015 Hz. Express answer in scientific notation.
A compound contain 60.87% carbon, 4.38% hydrogen, and 34.75% oxygen then determine its empirical formula?
At what temperature would a 1.20 M NaCl solution freeze, given that the van't Hoff factor for NaCl is 1.9? K_f for water is 1.86 C/m
an unknown gas has a density of 1.60 g/L at 1.00 atm and 30.5 degrees celsius what is the molar mass of the gas.
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