Chemistry concepts and calculations

A certain dry mixture contains only three compounds: silver nitrate ( AgNO3), ma

A certain dry mixture contains only three compounds: silver nitrate ( AgNO3), magnesium chloride (MgCl2), and barium nitrate Ba(NO3)2. When 1.253 g of the mixture was added to exc…

A certain electrochemical cell has for its cell reaction: Zn + HgO rightarrow Zn

A certain electrochemical cell has for its cell reaction: Zn + HgO rightarrow ZnO + Hg Which is the half-reaction occuring at the anode HgO + 2e^- rightarrow Hg + O^2- Zn^2+ + 2e^…

A certain element found in nature has two stable isotopes, A and B. The abundanc

A certain element found in nature has two stable isotopes, A and B. The abundance of one of Isotope A, which has a mass number of 62.930, is 69.15%. The atomic weight of the eleme…

A certain first order chemical reaction has a rate constant value of 71.5 s_1 at

A certain first order chemical reaction has a rate constant value of 71.5 s_1 at 36.00 degreeC and an activation energy of 103.0 kJ/mol. At what temperature (celsius) will the rat…

A certain first-order reaction (A rightarrow products) has a rate constant of 3.

A certain first-order reaction (A rightarrow products) has a rate constant of 3.00 times 10^-3 s^-1 at 45 degree C. How many minutes does it take for the concentration of the reac…

A certain first-order reaction (A-products) has a rate constant of 8.40x10-3 s1

A certain first-order reaction (A-products) has a rate constant of 8.40x10-3 s1 at 45 ° C. How many minutes does it take for the concentration of the reactant, AI, to drop to 6.25…

A certain first-order reaction has a rate constant of 2.65×10 2 s1 at 20 C. What

A certain first-order reaction has a rate constant of 2.65×102 s1 at 20 C. What is the value of k at 58 C if Ea = 79.0 kJ/mol ? Part A A certain first-order reaction has a rate co…

A certain first-order reaction has a rate constant of 2.65×10 2 s1 at 20 C. What

A certain first-order reaction has a rate constant of 2.65×102 s1 at 20 C. What is the value of k at 58 C if Ea = 79.0 kJ/mol ? A certain first-order reaction has a rate constant …

A certain gas is present in a 10.0 L cylinder at 1. 0 atm pressure it the pressu

A certain gas is present in a 10.0 L cylinder at 1. 0 atm pressure it the pressure increased to 2 0 atm the volume of the gas decreases lo 5 0 L Find the two constants k the value…

A certain gas is present in a 10.0 L cylinder at 4.0 atm pressure. If the pressu

A certain gas is present in a 10.0 L cylinder at 4.0 atm pressure. If the pressure is increased to 8.0 atm the volume of the gas decreases to 5.0 L . Find the two constants k_i, t…

A certain gas is present in a 15.0 L cylinder at 3.0 atm pressure. If the pressu

A certain gas is present in a 15.0 L cylinder at 3.0 atm pressure. If the pressure is increased to 6.0 atm, the volume of the gas decrease to 7.5 L. Find the two constants k_1, th…

A certain gas obeys the van der Waals equation of state. Show that for just one

A certain gas obeys the van der Waals equation of state. Show that for just one critical state specified by T_c and V_c that both Write the equation of state giving p = P/P_c in t…

A certain gas, XY(g), decomposes as represented by the equation above. A sample

A certain gas, XY(g), decomposes as represented by the equation above. A sample of each of the three gases is put in a previously evacuated container. The initial partial pressure…

A certain half-reaction has a standard reduction potential +0.10 V. An engineer

A certain half-reaction has a standard reduction potential +0.10 V. An engineer proposes using this half-reaction at the anode of a galvanic cell that must provide at least 1.20 V…

A certain half-reaction has a standard reduction potential E0d=-1.07 V. An engin

A certain half-reaction has a standard reduction potential E0d=-1.07 V. An engineer proposes using this half-reaction at the anode of a galvanic cell that must provide at least 1.…

A certain half-reaction has a standard reduction potential E^degree_red = +1.24

A certain half-reaction has a standard reduction potential E^degree_red = +1.24 V . An engineer proposes using this half-reaction at the cathode of a galvanic cell that must provi…

A certain half-reaction has a standard reduction potential E_red^0 = -0.94 V. An

A certain half-reaction has a standard reduction potential E_red^0 = -0.94 V. An engineer proposes using this half-reaction at the cathode of a galvanic cell that E must provide a…

A certain half-reaction has a standard reduction potential Ered-0 V. An engineer

A certain half-reaction has a standard reduction potential Ered-0 V. An engineer proposes using this half-reaction at the anode of a galvanic cell that must provide at least 1.20 …

A certain half-reaction has a standard reduction potential Ered= +0.40 V. An eng

A certain half-reaction has a standard reduction potential Ered= +0.40 V. An engineer proposes using this half-reaction at the cathode of a galvanic cell that must provide at leas…

A certain half-reaction has a standard reduction potential Ered= +0.40 V. An eng

A certain half-reaction has a standard reduction potential Ered= +0.40 V. An engineer proposes using this half-reaction at the cathode of a galvanic cell that must provide at leas…

A certain half-reaction has a standard reduction potential Fed +0.56 V. An engin

A certain half-reaction has a standard reduction potential Fed +0.56 V. An engineer proposes using this half-reaction at the cathode of a galvanic cell that must provide at least …

A certain hydrate has the formula MgSO_4.xH_2 O. A quantity of the compound (54.

A certain hydrate has the formula MgSO_4.xH_2 O. A quantity of the compound (54.2 g) is heated to drive off the water. If the steam generated exerts a pressure of 24.8 atm in a 2.…

A certain liquid has a density of 2.67 g/cm^3. 1340 g of this liquid would occup

A certain liquid has a density of 2.67 g/cm^3. 1340 g of this liquid would occupy a volume of _____ L. A) 1.99 times 10^-3 B) 50.2 C) 3.58 D) 35.8 E) 0.502 Elements _____ exhibit …

A certain main-group element exhibits the following successive ionization energi

A certain main-group element exhibits the following successive ionization energies in kJ/mol: IE1 = 100; IE2 = 1200; IE3 = 2300; IE4 = 3100; IE5 = 4200 Select the false statement …

A certain main-group element exhibits the following successive ionization energi

A certain main-group element exhibits the following successive ionization energies in kJ/mol: IE1 = 100; IE2 = 1200; IE3 = 2300; IE4 = 3100; IE5 = 4200 Select the false statement …

A certain main-group element exhibits the following successive ionization energi

A certain main-group element exhibits the following successive ionization energies in kJ/mol: IE1 = 100;   IE2 = 1200;   IE3 = 2300;   IE4 = 3100;   IE5 = 4200 Select the false st…

A certain mass of air initially at a pressure of 480 kPa and temperature 190°C i

A certain mass of air initially at a pressure of 480 kPa and temperature 190°C is expanded adiabatically to a pressure of 94 kPa. It is then heated at constant volume until it att…

A certain metal container has the following dimensions: 30 cm x 15 cm x 2.3 cm.

A certain metal container has the following dimensions: 30 cm x 15 cm x 2.3 cm. 1.0 mol of N2 gas at 27 oC is inside the container. The container can withstand 250,000 lbs of forc…

A certain minimum energy(E min) is required to eject an electron from a photosen

A certain minimum energy(E min) is required to eject an electron from a photosensitive surface. Any energy obsorbed beyond this minimum gives kinetic energy to the ejected electro…

A certain objects\' temperature increases by 1.0 degree C for every 1560 J that

A certain objects' temperature increases by 1.0 degree C for every 1560 J that it gains. A 0.1964 g sample of quinone (molar mass = 108.1 g mole) was burnt in it, and the surround…

A certain objects\' temperature increases by 1.0 degree C for every 1560 J that

A certain objects' temperature increases by 1.0 degree C for every 1560 J that it gains. A 0.1964 g sample of quinone (molar mass = 108.1 g/mole) was burnt in it. and the surround…

A certain organic acid (A) was prepared by dissolving 3 g of A in 100 mL. of wat

A certain organic acid (A) was prepared by dissolving 3 g of A in 100 mL. of water. The solubility of A in water is 3g/100 mL and solubility in an organic solvent (dichloromethane…

A certain oxygen atom has the electron configuration1s 2 2s 2 2p x 2 2p y 2 How

A certain oxygen atom has the electron configuration1s2 2s2 2px22py2    How many unpaired electrons are present? Is this an excited state for oxygen? In going from thisstate to th…

A certain radioactive sample contains 2.4 10^3 nuclides at a certain time (t = 0

A certain radioactive sample contains 2.4 10^3 nuclides at a certain time (t = 0); 3.0 h later the sample contains 6.0 10^2 nuclides. 34. For this sample the ratio of the decay ra…

A certain radioactive sample contains 2.4 10^3 nuclides at a certain time (t = 0

A certain radioactive sample contains 2.4 10^3 nuclides at a certain time (t = 0); 3.0 h later the sample contains 6.0 10^2 nuclides. For this sample the ratio of the decay rates …

A certain reaction has a percent yield of 73.60%, and a chemist needs to synthes

A certain reaction has a percent yield of 73.60%, and a chemist needs to synthesize (get an actual yield of) 100.0 g. What theoretical yield should the chemist plan for to get an …

A certain reaction has an activation energy of 28.39 kJ/mol. At what Kelvin temp

A certain reaction has an activation energy of 28.39 kJ/mol. At what Kelvin temperature will the reaction proceed 3.50 times faster than it did at 299 K? A certain reaction has an…

A certain reaction has an activation energy of 46.32 kJ/mol. At what kelvin temp

A certain reaction has an activation energy of 46.32 kJ/mol. At what kelvin temperature will the reaction proceed 3.00 times faster than it did at 299 K? Phosphorus pentachloride …

A certain reaction has an activation energy of 63.0 kJ/mol and a frequency facto

A certain reaction has an activation energy of 63.0 kJ/mol and a frequency factor of A1 = 6.50 Times 1012 M-1 s-1. What is the rate constant, k, of this reaction at 24.0 degree C?…

A certain reaction has an activation energy of 69.0kJ/mol and a frequency factor

A certain reaction has an activation energy of 69.0kJ/mol and a frequency factor of A1 = 6.60 Times 1012M-ls-1 What is the rate constant, k, of this reaction at 23.0 degree C ? Ex…

A certain reaction has an activation energy of 69.0kJ/mol and a frequency factor

A certain reaction has an activation energy of 69.0kJ/mol and a frequency factor of A1 = 6.60 Times 1012M-ls-1 What is the rate constant, k, of this reaction at 23.0 degree C ? Ex…

A certain reaction has negative values for both ? H and ? S . Therefore, the rea

A certain reaction has negative values for both ?H and ?S. Therefore, the reaction must be spontaneous at all temperatures. cannot be spontaneous at any temperature. can be sponta…

A certain reaction has the following general reaction aA=bB At a particular temp

A certain reaction has the following general reaction aA=bB At a particular temperature and [A]0=2.00x10^-2 M,concentration versus time data were collected for this reaction,and a…

A certain reaction has the general form aA rightarrow bB. At a particular temper

A certain reaction has the general form aA rightarrow bB. At a particular temperature, and [A]_o= 2.0 times 10^-2 M, concentration versus time data were collected and a plot of ln…

A certain reaction is known to have an activation energy E 78.0 kJ/mol. Furtherm

A certain reaction is known to have an activation energy E 78.0 kJ/mol. Furthermore, the rate of this reaction is measured at 288. K and found to be 7.1 x10 M/s. Use this informat…

A certain rifle bullet has a mass of 6.93 g. Calculate the de Broglie wavelength

A certain rifle bullet has a mass of 6.93 g. Calculate the de Broglie wavelength of the bullet traveling at 1721 miles per hour. Physical constants can be found here (Please see C…

A certain salt has a negative Enthalpy of Solution (i.e. Delta H_soln = -), and

A certain salt has a negative Enthalpy of Solution (i.e. Delta H_soln = -), and a positive Entropy of Solution (Delta S_so ln = +). Upon increasing the temperature of the water so…

A certain salt has a negative Enthalpy of Solution (i.e. H soln = –), and a posi

A certain salt has a negative Enthalpy of Solution (i.e. Hsoln = –), and a positive Entropy of Solution (Ssoln = +). Upon increasing the temperature of the water solvent, you woul…

A certain salt has a negative Enthalpy of Solution (i.e. Hsoln = –), and a posit

A certain salt has a negative Enthalpy of Solution (i.e. Hsoln = –), and a positive Entropy of Solution (Ssoln = +). Upon increasing the temperature of the water solvent, you woul…

A certain sample was analyzed by proton NMR and found to consist of ortho-xylene

A certain sample was analyzed by proton NMR and found to consist of ortho-xylene (boiling point 144° C), para-xylene (boiling point 137°C) and meta-xylene (boiling point 139°C). R…