Chemistry concepts and calculations

(a) How many milliliters of 0.165 M HCl are needed to neutralize completely 35.0

(a) How many milliliters of 0.165 M HCl are needed to neutralize completely 35.0 mL of 0.101 M Ba(OH)2 solution? ml (b) How many milliliters of 2.50 M H2SO4 are needed to neutrali…

(a) How many milliliters of 0.165 M HCl are needed to neutralize completely 45.0

(a) How many milliliters of 0.165 M HCl are needed to neutralize completely 45.0 mL of 0.101 M Ba(OH)2 solution? ________ml (b) How many milliliters of 1.50 M H2SO4 are needed to …

(a) How many milliliters of a stock solution of 12.0 MHNO 3 would you have to us

(a) How many milliliters of a stock solution of 12.0 MHNO3 would you have to use to prepare 0.450 L of 0.500 MHNO3? ____ mL (b) If you dilute 27.0 mL of the stock solution to a fi…

(a) How many moles of ammonium ions are in 0.339 g of ammoniumcarbonate? _____ m

(a) How many moles of ammonium ions are in 0.339 g of ammoniumcarbonate? _____ mol (b) What is the mass, in grams, of 0.0587 mol of iron(III)phosphate? _____ g (c) What …

(a) How many moles of potassium ions are in 306 g alum? - mol (b) What is the ma

(a) How many moles of potassium ions are in 306 g alum? - mol (b) What is the mass % S in alum (to 3 significant figures)? - % (c) What is the maximum amount of alum (in metri…

(a) Identify all eutectic and peritectic points in the diagram, specifying each

(a) Identify all eutectic and peritectic points in the diagram, specifying each point by composition and temperature. (b) Consider an alloy of Ti with 20 wt.% Ni, slowly cooled fr…

(a) Identify the oxidizing and reducing agents among the reactants below 2S_2O^2

(a) Identify the oxidizing and reducing agents among the reactants below 2S_2O^2-_4 + TeO^2-_3 + 2OH^- times rightarrow 4SO^2-_3 + Te(s) + H_2O Dithionite Tellurite Sulfite (b) Ho…

(a) If 0.1 mol of NH4I is dissolved in water at 25 oC and reach a final volume o

(a) If 0.1 mol of NH4I is dissolved in water at 25 oC and reach a final volume of 1.00 L, please calculate the equilibrium concentration of [OH-] and [H3O+]. Please briefly explai…

(a) If a sample contains 1.97 mL of nitroglycerine (density = 1.592 g/mL) is det

(a) If a sample contains 1.97 mL of nitroglycerine (density = 1.592 g/mL) is detonated, how much total moles of gas are produced? (b) If each mole of gas occupies 58 L under the c…

(a) If a single pane glass window on a house has an area of 0.5 m 2 and is 3mm t

(a) If a single pane glass window on a house has an area of 0.5 m2 and is 3mm thick, what is rate of heat loss through this window on a cold winter day when the inside surface of …

(a) If a sodium hydroxide solution were added to a solution containing lead(II)

(a) If a sodium hydroxide solution were added to a solution containing lead(II) ions, sodium ions, nickel(II) ions, and potassium ions, which ion(s) would remain in the supernatan…

(a) If we begin with an initial SO 2 Cl 2 pressure of 325 torr, what is the pres

(a) If we begin with an initial SO2Cl2 pressure of 325 torr, what is the pressure of this substance after 74 s? _________ torr (b) At what time will the pressure of SO2Cl2 decline…

(a) If we begin with an initial SO 2 Cl 2 pressure of 325 torr, what is the pres

(a) If we begin with an initial SO2Cl2 pressure of 325 torr, what is the pressure of this substance after 74 s? _________ torr (b) At what time will the pressure of SO2Cl2 decline…

(a) In a chemical reaction 2 moles of solid decompose to form one mole of gas. W

(a) In a chemical reaction 2 moles of solid decompose to form one mole of gas. Would you expect AS to be positive, negative, or close to zero for this reaction? AS for this reacti…

(a) In a chemical reaction 3 moles of A(g) and 2 moles of B(g) react to form 4 m

(a) In a chemical reaction 3 moles of A(g) and 2 moles of B(g) react to form 4 moles of C(g) and 1 mole of D(g). Would you expect DS to be positive, negative, or close to zero for…

(a) In a chemical reaction 3 moles of one gas and 2 moles of a second gas react

(a) In a chemical reaction 3 moles of one gas and 2 moles of a second gas react to form 4 moles of a third gas and 2 moles of liquid. Would you expect DS to be positive, negative,…

(a) In a chemical reaction a solid decomposes to form two different gases. Would

(a) In a chemical reaction a solid decomposes to form two different gases. Would you expect DS to be positive, negative, or close to zero for this reaction? DS for this reaction s…

(a) In a chemical reaction one mole of gas reacts with a liquid generating anoth

(a) In a chemical reaction one mole of gas reacts with a liquid generating another liquid and one mole of another gas. Would you expect DS to be positive, negative, or close to ze…

(a) In an air-conditioned room at 19.0 C, a spherical balloon had the diameter o

(a) In an air-conditioned room at 19.0 C, a spherical balloon had the diameter of 50.0 cm. When taken outside on a hot summer day, the balloon expanded to 51.0 cm in diameter. Wha…

(a) In part B of this experiment, you will use copper(II) sulfate pentahydrate.

(a) In part B of this experiment, you will use copper(II) sulfate pentahydrate. What is the molar mass of this compound? g/mol (b) How much of this compound must be weighed to mak…

(a) In part B of this experiment, you will use copper(II) sulfate pentahydrate.

(a) In part B of this experiment, you will use copper(II) sulfate pentahydrate. What is the molar mass of this compound? g/mol (b) How much of this compound must be weighed to mak…

(a) In the acetylene molecule (C2H2), which of the following are present? A) 2 V

(a) In the acetylene molecule (C2H2), which of the following are present? A) 2 VSEPR electron pairs around each carbon atom B) 3 ? and 1 ? bonds C) 2 ? bonds D) 1 ? bond (b) In et…

(a) In the acetylene molecule (C2H2), which of the following are present? A) 2 V

(a) In the acetylene molecule (C2H2), which of the following are present? A) 2 VSEPR electron pairs around each carbon atom B) 3 ? and 1 ? bonds C) 2 ? bonds D) 1 ? bond (b) In et…

(a) In the developed world, DDT is now generally seen in a negative light. Howev

(a) In the developed world, DDT is now generally seen in a negative light. However this has not always been the case – for instance, Paul Müller was awarded the Nobel Prize …

(a) In the following reaction, determine the substrate, nucleophile and mechanis

(a) In the following reaction, determine the substrate, nucleophile and mechanism? Part (a) options (a)The substrate is a primary halide. The nucleophile is propyl bromide. The me…

(a) In the hydrogen spectrum produced, how many lines in the visible region are

(a) In the hydrogen spectrum produced, how many lines in the visible region are produced? _____ lines (b) The red line in the hydrogen emission spectrum results from which of the …

(a) In water is H2NCH(CH3)2, a strong acid, a weak acid, a strong base, a weak b

(a) In water is H2NCH(CH3)2, a strong acid, a weak acid, a strong base, a weak base, none of these, or cannot be determined? Briefly justify your choice. Write a balanced chemical…

(a) Let us consider CH4 combustion in air with an equivalence ratio of 0.9, wher

(a) Let us consider CH4 combustion in air with an equivalence ratio of 0.9, where we have air flow rate of 400 kg/s. (1) calculate the required flow rate of CH4 (in kg/s), the air…

(a) List the six possible sets of quantum numbers (n. min ms) of a 2p electron.

(a) List the six possible sets of quantum numbers (n. min ms) of a 2p electron. (Select all that apply.) (2, 1,-1, 1/2) (2, 0, +1, +1/2) (2, 1, 0, 1/2) (2, 1, 0, 1/2) (2, -1, +1, …

(a) Lithium metal reacts with water to give lithium hydroxide and hydrogen gas.

(a) Lithium metal reacts with water to give lithium hydroxide and hydrogen gas. If 75.5mL of hydrogen gas is produced at STP, what is the mass of lithium metal that reacted? 2Li(s…

(a) Mean is a measure of the central tendency of the distribution, and is equal

(a) Mean is a measure of the central tendency of the distribution, and is equal to the artihemetic average of the given data points. Mean = (Sum of all data values)/(Total number …

(a) Methane, CH 4 , burns in the presence of oxygen to form water vapor and carb

(a) Methane, CH4, burns in the presence of oxygen to form water vapor and carbon dioxide. Write a balanced chemical equation for this combustion reaction. (Include states-of-matte…

(a) Molecule X receives excitation and emits fluorescence. If the excitation wav

(a) Molecule X receives excitation and emits fluorescence. If the excitation wavelength is 320 nm, which of the following could be the emission wavelength: 270 nm, 290 nm, 320 nm,…

(a) Moles of O2 = mass / molar mass = 2.43 / 32.0 = 0.0759 mol According to Dalt

(a) Moles of O2 = mass / molar mass = 2.43 / 32.0 = 0.0759 mol According to Dalton's law of partial pressures, Total pressure = Sum of partial pressures SO, Ptotal = PCH4 + PO2 Pt…

(a) Name/predict the two major products from the saponification of glycerol trip

(a) Name/predict the two major products from the saponification of glycerol tripalmitate, followed by acidification. (b) What are two bases commonly used for saponification? (c) I…

(a) No reaction occurs because reduction potential of silver is greater than tha

(a) No reaction occurs because reduction potential of silver is greater than that of copper, so it will not get oxidized to replace Cu2+. (b) No reaction occurs because reduction …

(a) On Column X, Compound A has a retention time of 2.15 minutes, and a peak wid

(a) On Column X, Compound A has a retention time of 2.15 minutes, and a peak width of 0.27 minutes, while Compound B has a retention time of 2.7 minutes and a peak width of 0.8 mi…

(a) On Column X, Compound A has a retention time of 2.15 minutes, and a peak wid

(a) On Column X, Compound A has a retention time of 2.15 minutes, and a peak width of 0.27 minutes, while Compound B has a retention time of 2.7 minutes and a peak width of 0.8 mi…

(a) Place the following species on order of increasing acid strength. Explain yo

(a) Place the following species on order of increasing acid strength. Explain your response. (i) HOCl, HOCIO, HOCIO_2 (ii) H_2O, H_2S, H_2Se (bond energies: H-O, 467 kJ mol^-1: H-…

(a) Plot V0 versus [S] and 1/V0 versus 1/[S] for these data. Does penicillinase

(a) Plot V0 versus [S] and 1/V0 versus 1/[S] for these data. Does penicillinase appear to obey Michaelis-Menten kinetics? If so, what is the value of KM? (b) What is the value of …

(a) Potassium iodate solution was prepared by dissolving 1.022 g of KIO3 (FM 214

(a) Potassium iodate solution was prepared by dissolving 1.022 g of KIO3 (FM 214.00) in a 500 mL volumetric flask. Then 50.00 mL of the solution was pipetted into a flask and trea…

(a) Reaction of Calcium cyanamide to produce ammonia: CaNCN (s) +H 2 O (l) -----

(a) Reaction of Calcium cyanamide to produce ammonia: CaNCN(s)+H2O(l)----->CaCO3(s)+NH3(g) Question: I know that a 2 gos in front of the H2Oand NH3...I am having a hard time un…

(a) Seawater contains approximately 0.055 M MgCl2. How many liters of seawater a

(a) Seawater contains approximately 0.055 M MgCl2. How many liters of seawater are required to produce 1.00 kg of magnesium metal? (b) The final step of the extraction of magnesiu…