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Please help me with these 2 chemistry questions.
Calculate the mole fraction of each component in a solution with 6.87 g of sodium chloride (NaCl) dissolved in 65.2 g of water. Work must be shown in order to earn credit.
Calculate the mass-to-mass ratio of 25.0 g of salt in 105 g of water. Work must be shown in order to earn credit.
What is the molarity of a HCl solution if 5.00 ml is neutralized by 28.6 ml of a 0.145 M NaOH solution?
the LDH molecule always contains 4 polypeptide subunits and each subunit can be either a H (heart) or a M (muscle) subunit. how many isozymes are possible
oxygen gas is contained in a 30.0 l tank at a pressure of 4.07 atm. the tank is connected by tubing to a second empty
Under these conditions, the half-life of the reaction has been estimated to be 6.4 103 min. What would the half-life be if the initial concentration of NO were 13 ppm?
Ten seconds after the big bang the Universe was composed of only protons, neutrons, electrons, neutrinos, antineutrinos and photons. Write a brief account of the processes since this point that have directly led to the production of the heavy elem..
Suggest chemical reactions that could be used to identify the contents of four unlabeled bottles containing solutions of the following substances: CuSO4, Al2(SO4)3, Pb(NO3)2, FeSO4.
Calculate concentration of chromate ion (CrO4) in a 0450 M solution of chromic acid (H2CrO4). (for chromic acid, Ka = .18, Ka2 = 3.2 x 10E-7)
Determination of an equilibrium constant by using a spectrophometer 1 In part 1 of this experiment how are solution of unknown Fe(SCN)2+ made? 2 in part 2 of this experiment,why are approximately equal concentration of the reactants,Fe3+ and SCN, ..
why is it important to immediately cover the Mg ribbon with the other slab of dry ice once it starts burning?
Which density might be expressed
Consider an electron neutrino with energy 8MeV.a) How far much it travel before it oscillates to a muon neutreno? b) How many complete oscillation (v_e -> v_u -> v_e) will take place if it travels from the sun to earth? through the earth?
A compound has a molar absorptivity of 3.71*10^3 L cm^-1 mol^-1. What concentration of the compound would be required to produce a transmittance
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