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Why does absorbance vs concentration calibration curve need not pass through origin (0,0) looking at beer lambert law?
the products formed are sodium bromide and hydrogen sulphite. Calculate the mass of sodium bromide produced.
A buffer having equal amounts of a weak acid and its conjugate base has a pH =4.4. A small amount of sodium hydroxide was combined to this buffer solution .
The isotope 172Ta undergoes decay by positron emission. After 2 hours , 1/6 of the initial amount of 172Ta remains undecayed. The half- life of the isotope is
If 1.87 g of acetic acid(CH3CO2H) reacts with 2.31g of isopentyl alcohol(C5H12O) to give 2.96 gm of isopentyl acetate(C7H14O2)
Give the number of atoms of the specified element in a formula unit of each of the following compounds, and calculate the molecular (formula) mass
C3H8 + 5O2 reacts to yield 3CO2 + 4H2O +488 kJ What is the heat released if 2.5 moles of C3H8 reacts completely with oxygen?
Which of these statements correctly describes a diamond?
If 17.8 grams of KOH dissolve in enough water to make a 198-gram solution, what is the concentration in percent by mass.
Calculate the concentration of Calcium (MW 40.078 g/mol) in the H2O in units of gram per 100 mL and calculate the concentration of Calcium (MW 40.078 g/mol) in the H2O in units of gram per 100 mL.
A flask containing gaseous N2 is irradiated with 25 nm light. The irradiated moleculars of N2 can absorb the energy from the light photons. Using the following information indicate what species can from in the flask during irradiation.
A pound of coffee beans yields 30 cups of coffee (4 cups = 1 ). How many milliliters of coffee can be obtained from 1.0 of coffee beans.
Methanol undergoes combustion in oxygen to make Carbon Dioxide Gas & Liquid Water. Find Standard Enthalpy of Reaction?
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