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Which is the Most abundant Noble gas in the air ? Name the element
the complete neutralization of 0.0527 moles of monoprotic acid with excess naoh evolves 2.82kj of heat. what is the
A solid sample containing some Fe^2+ ion weighs 1.062 g. It requires 24.12 mL 0.01562 m KNno4 to titrate Fe^2+ in the dissolved sample to a pink end point. How many moles MnO4- ion are required
A student determines the mass of a bone to be 23.3751g. A 50 mL graduated cylinder contains 30.3 mL of water. When the bone is placed in the water-filled cylinder,
How much heat must be applied to a 18.3 g sample of iron (s=0.449J/(g x *C) in order to raise its temperature from 23.8*C to 356.6*C
a 250ml solution of NaOH has 20g of solute. what is the concentration in moles per litre? what is the concentration of each ion?
What is the theoretical yield of AgCl if 30.2 mL of 0.1000 M AgNO3 reacts with an excess of 0.1000 M HCl
An organic acid contains 41.4% carbon, 3.47% hydrogen, and 55.1% oxygen by weight. A 0.080-mol sample of this compound weighs 11.60 g. What is the molecular formula of this acid
Question- What is the pH of a 0.25M solution of arsenic acid, H3AsO4. In this solution, what are the concentrations of H2AsO4^- and HAsO4^2-
the amount of lactic acidhc3h5o3 produced in a sample ofmuscle tissue was analyzed by reaction with hydroxide
Problem- For the following general reaction what can be said about the spontaneity at different temperatures. A + B ? C + D; ?Ho is negative; ?So is negative Select one:
If the rate of appearance of Cr2 (SO4)3 is 1.64 mol/min at a particular moment, explain what is the rate of disappearance of C2H6O at that moment. 2 K2Cr2O7 + 8 H2SO4 + 3 C2H6O 2 Cr2(SO4)3 + 2 K2SO4 + 11 H2O
Calculate the slope of the straight line 2. What is the density of the substance 3. Briefly explain why it is more accurate to use the slope of the plot to determine the density than it is to use data from a single determination
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