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Discrete Math questions.
How many numbers without decimal points must you select w/o replacement from the range [1, 101] in order to guarantee:
How many exams in a 7-day week must you do to guarantee:
in an organic compound % of carbon is 75.2%,% of hydrogen is 10.75 and % of oxygen is 14.03..Find the empirical formula of compound?
5H2C2O4 + 2KMnO4 --> 10CO2 + K2SO4 + 2MnSO4 + 8H20, How many g of H2SO4 are required to produce 75g of CO2
Find out the number of grams of Na2SO4 that can be prepared by the reaction of 7.44g of NaOH with sufficient H2.
The reagents available other than DI water are 3.0 M solutions of any acid or base that you may need. How would you go about preparing this buffer
The rate constant (k) for a reaction was measured as a function of temperature. A plot of ln k versus 1/t (in K ) is linear and has a slope of ?1.13×10^4 K.
5Ca+ V2O5 ----> 5CaO + 2V In one process, 1.54 x 10^3 g of V2O5 react with 2.07 x 10^3 g Ca. Calculate the theoretical yield of V. Calculate the percent yield if 795 g V are obtained
what is the remaining Ag+ ion concentration and is precipitation complete? The solubility product constant of AgBr is 5.0 × 10-13.
When potassium hydroxide runs out and we have to use potassium carbonate instead. Will potassium carbonate be a good titrant to use for selective precipitation?
Given a particle of mass m confined to rectangular surface pf length L1 in the x- direction and L2 in the y direction. potential energy is zero everywhere inside the 2D rectangular surface except at the walls, where it is infinite.
An "A" group metal (M) reacts with chlorine and oxygen to form ionic compounds with the formulas MCl4 and MO2. Propose a possible identity for the metal M. Explain your reasoning.
Express the molar concentration numerically using two significant figures. What is the final concentration of D at equilibrium if the initial concentrations of A = 1.00M and B= 2.00M
some people said that the precipitate disappeared and the solution went back to a bright orange/yellow clear colour, what is the chemical equation that describes both these reactions,
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