When copper and sulfur react, two products are possible: copper(I) sulfide, Cu2S, and copper(II) sulfide, CuS. A scientist hypothesizes that holding a loop of thin copper wire in the vapour from boiling sulfur will produce pure Cu2S when the copper and sulfur react. Suggest what measurements, related to mole ratios, the scientist should make to test this hypothesis.
Q: Palladium is named after the asteroid Pallas, forms a gaseous compound of the formula Pd(CO)x What…
A: According to Graham’s law of effusion, the rate of effusion of a gas is inversely proportional to…
Q: Some antacids are used by dropping a tablet into a glass of water, which results in significant…
A: The antacid tablets fizz when they come in contact with water because of a chemical reaction. The…
Q: enzyme Nitrite reductase has which of the elements as its constituent ?
A: Enzymes facilitate speed up chemical reactions within the human body. They bind to molecules and…
Q: Combustion of a fuel sample in a bomb calorimeter increases the temperature of the entire system by…
A: Given: Mass of water (m1 )=1700 gIncrease in temperature(∆T1)=5.10°CMass of water(m2)=2200Increase…
Q: The substance oxygen has the following properties: normal melting point: 54.8 K normal boiling…
A: There are three most common states of matter: solid, liquids, and gases. These states of matter can…
Q: Cao (s) (calcium oxide) is the main ingredient of concrete. While mixing Cao with water, the mixture…
A: Given that the CaO reaction with H2O gives out heat and forms Ca(OH)2 in the product. So the…
Q: The unknown metal sulfates are hygroscopic and will absorb water from air. The unknowns must thus be…
A: Hygroscopic properties of sulfate-containing metals are crucial to understanding the atmospheric…
Q: 140 120 Super- critical fluid A 100 CO,(s) Co,(1) 80 Critical point 30.98°C, 60 72.79 atm 40 В 20…
A: Asked : Slope of the line BC is asked for the given phase diagram.
Q: Heliox is a helium‑oxygen mixture that may be used in scuba tanks for divers working at great…
A: Boyles law states that at a constant temperature, the pressure of a gas is inversely proportional to…
Q: A chemist is performing a precipitation titration on a 1.00 L sample containing an unknown…
A: Titration is the process, in which the exact concentration of the unknown solution can be used to…
Q: 1.23 g sample of acetic acid (HC2H3O2) was burned in excess oxygen in a bomb calorimeter. The…
A: Initial Temperature= 23.77 degree celsius Final Temperature= 27.95 degree celsius Weight of sample=…
Q: Which statement best explains why alcohols have a higher boiling point than Alcohols have weaker…
A: Alcohols are polar molecules and alkanes are non-polar molecules. Alcohols and alkanes both are…
Q: Which of the following correctly identifies the number of each element involved in the chemical…
A: The chemical formulas of a given molecule represent the simple ratios or the number of molecules of…
Q: Which of the following compounds would you expect to have the highest boiling pointand which the…
A: The boiling point of a substance is the temperature at which liquid turns into vapour. The boiling…
Q: Nitrogen and hydrogen react to form ammonia, like this: N2(g)+3H2(g) → 2 NH,(g) Imagine 56. mmol of…
A: Chemical reactions and equilibriums are usually monitored by the Le-Chatelier's principle. The…
Q: At room temperature, substance 1 is a gas while substance 2 is a liquid. Which of the following is…
A: A state of matter is defined as one of the distinct forms that various phases of matter take on. The…
Q: Balance these chemical equations. (Use the lowest possible whole number coefficients.)
A: Using the lowest possible whole number coefficients the balanced chemical reactions are:- (d)…
Q: When 5.58 g of a solid mixture composed of NH4CI and CaCl2 was dissolved in 100.0 mL of water, the…
A: 2 questions are asked. According to guidelines, will answer the 1st question only. 100 ml water…
Q: What coefficients must be placed in the following blanks sothat all atoms are accounted for in the…
A: As per the law of conservation of mass, mass can neither be created nor destroyed. This also applies…
Q: How many moles of Na2S2O3 would be required to react completely with 0.450 g of AgBr?
A: As it is given, Na2S2O3 is reacted with the AgBr, the balanced reaction is shown below: 2Na2S2O3 +…
Q: A. List the five tests from your lab report and answer positive or negative for the following…
A: The given structure is of aldopentose.
Q: Scott test is one of the methods used for screening for Cocaine in Forensic Chemistry. The multi…
A: Asked : Given option which is correct regarding first step of the test
Q: As pH increases, there is increasingly more H+ than OH-
A: The pH of a solution is the log of hydrogen ion concentration with a negative sign. pH = -log (H+)…
Q: The spectator ions in the reaction between aqueous perchloric acid and aqueous barium hydroxide are:…
A: 2-
Q: 46
A: Ions are the species that are marked with some kind of charge. The charge can be either a positive…
Q: Chloroform is a volatile (readily changes from liquid phase to gaseous phase) once commonly used in…
A: Chloroform is an organic compound which is colorless, strong-smelling, dense liquid with a formula…
Q: How many liters of dry hydrogen gas, measured at 798 mmHg and 21C, will be released by the…
A: When change in pressure, volume and temperature occurs than the combined gas law is used. Combined…
Q: Trans-oleic acid (18:1,D9) has a melting temperature of (44.5C) and cis-oleic acid (18:1,D9) has a…
A: A cis arrangement implies that when there is a double bond, the neighboring carbon atoms are on the…
Q: Which of the following liquid substances exhibit the highest viscosity at 25 ºC? A.…
A: Organic molecules are molecules made of carbon, hydrogen, and oxygen. The organic molecules are…
Q: The following items are ions: O Na+, NO2, H+ O CO2, K+, Ca+ Na+, H+, K+ СО2, Н20, NO2
A: The human body contains many ions such as sodium, potassium, calcium, chloride ions. They are…
Q: Trans-oleic acid (18:1,D9) has a melting temperature of (44.5C) and cis-oleic acid (18:1,D9) has a…
A: Oleic acid is an 18 carbon long mono-unsaturated fatty acid which bears double bond at carbon number…
Q: Which of the following has the highest iodine content? Which of the following has the lowest…
A: Fatty acid: These are the most common lipids. Based on the type of bonds they are classified into…
Q: Hot air at 50 C does not cause a lethal burn on our skin, but water with the same temperature is…
A: yes its true that Hot air even at 50C can not burn our skin, but water with same temperature can…
Q: If 5.0 g of calcium hydroxide are needed, how many moles of magnesium hydroxide would be produced?…
A: 1.27 Moles of Mg(OH)2 are produced from 1 mole of Ca(OH)2.
Q: (i) MnO is basic whereas Mn207 is acidic in nature. Why? (ii) Transition metals form alloys. Why?…
A: Chemical compounds are the important basis of life. The compounds that are obtained from living…
Q: Ethyl mercaptan is an odorous substance added to natural gas to make leaks easily detectable. A…
A: Given: Ethyl mercaptan is an odorous substance added to natural gas to make leaks easily detectable.…
Q: The phrase that denotes a simple substitution reaction between the following expressions 1- The…
A: Water is used as a solvent in laboratories, biochemical systems and industries. The water molecule…
Q: The precipitation of three solid compounds: X, Y, Z, have the following equilibrium constants: Kx =…
A: X,Y,Z Kx= 1.7×10^4 Ky= 0.6× 10^8 Kz= 9.2×10^12 As it can be seen,Kz>Ky>Kx The solubility…
Q: This equation models how pure silver (Ag) is extracted from ores of AgK(CN)2 (potassium…
A: Silver is extracted by Mac-Arthur Forest cyanide Process - Step one is the formation of soluble…
Q: FREE RESIDUAL CHLORINE IS 1. Chloramide compounds 2. hypochlorous or chloric acid 3. haloform…
A: Introduction :- The quantity of chlorine that remains in the water after a given period or contact…
Q: hydrogen at 101 kpa each day . If each days supply of hydrogen were kept at a pressure of 366 kpa,…
A: The relationship for Boyle's Law can be expressed as follows: P1V1 = P2V2, where P1 and V1 are the…
Q: A slice of pizza has 500 kcal. If we could burn the pizza and use all the heat to warm a 50-L…
A: Specific heat is a physical property of substance. It is the amount of heat needed per unit mass to…
Q: A team of investigators is out on a boat on a lake on a marvelous,sunny summer day, and they are…
A: Introduction Ocean have totally different ecosystem as there are different factors that affect the…
Q: Suppose you have a solution of 0.1 M H2CO3 and 0.1 M NaHCO3. Which of the following reactions takes…
A: A buffer solution is composed of a weak acid and its conjugate base. Buffer solution resists the…
Q: find the viscosity of the following using perry's table 2-312, 2-318 8th edition Air at 30°C 89%…
A: Viscosity is caused by friction within a fluid. It is the result of intermolecular forces between…
When copper and sulfur react, two products are
possible: copper(I) sulfide, Cu2S, and copper(II)
sulfide, CuS. A scientist hypothesizes that holding a
loop of thin copper wire in the vapour from boiling
sulfur will produce pure Cu2S when the copper and
sulfur react. Suggest what measurements, related to
mole ratios, the scientist should make to test this
hypothesis.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- The unknown metal sulfates are hygroscopic and will absorb water from air. The unknowns must thus be kept in desiccators to remove any absorbed water. Howwould your results be affected if your unknown sample was not desiccated? Would this error cause your calculation of the mass percent of sulfate in the unknown to be too high or too low? Explain.Trans-oleic acid (18:1,D9) has a melting temperature of (44.5C) and cis-oleic acid (18:1,D9) has a melting point of (13.4C). Briefly explain the difference in melting points between the two. tw.Guanosine (C10H13N5O5) in solution has a maximum absorbance at a wavelength of 275 nm. The molar extinction co-efficient at this wavelength is 84M−1cm−1and the path length is 24.7 cm. Through the use of a spectrophotometer, it is found that the that A275= 1.48. What is the concentration of the guanosine solution in grams/litre? Molecular weights (g/mol): C-12, H-1, N-14, O-16 Select one: A. 0.201869 g/L B. 0.435188 g/L C. 0.059919 g/L D. 0.294046 g/L E. 0.000713 g/L
- A 1.00 g sample containing NaHCO3 was dissolved in water and titrated using 0.500 M HCI. The sample solution required 12.5 mL of the titrant solution to reach endpoint. Assuming that only NaHCO3 reacts with HCl, how much of NaHCO3 is present in the sample? gA chemist is performing a precipitation titration on a 1.00 L sample containing an unknown concentration of the cadmium ion, Cd2+. If it takes 24.52 mL of a 0.250 M solution of Na2CO3 to reach the end point, calculate the concentration of the cadmium ion?Titanium dioxide, which is the most common white pigment in paint, can be produced from the titanium mineral, rutile, by chlorination to TiCl4, followed by oxidation to TiO2. To purify the insoluble titanium dioxide, it is washed free of soluble impurities in a continuous, countercurrent system of thickeners with water. Two hundred thousand kg/h of 99.9 wt% titanium dioxide pigment is to be produced by washing, followed by filtering and drying. The feed contains 50 wt% TiO2, 20 wt% soluble salts and 30 wt% water. The wash liquid is pure water at a flow rate equal to that of the feed on a mass flow basis .Determine the number of ideal stages using the McCabe-Smith method. kg solute/kg solution kg solution/kg TiO2 0.0 0.30 0.2 0.34 0.4 0.38 0.6 0.42
- A patient’s treatment plan requires two IV solutions to be administered:20% magnesium sulfate, MgSO4, and 10% calcium chloride, CaCl2. Thenurse is concerned, MgSO4 and CaCl2 are listed as incompatible IVsolutions with the risk of solid precipitate formation (image shown toright). Write the chemical equation that predicts the products thatform when combining MgSO4 and CaCl2. Please use the providedsolubility chart to help you determine chemical phases.A base is added to a 0.050 M solution of MnCl2, raising the pH gradually. Calculate the pH of the solution when 88 of the manganese has precipitated? Table 5-7 Solubility-Product Constants, K, at 25°C Fluorides Chromates (cont.) Ag, Cro, PbCro, Hydroxides (cont) Ni(OH), Zn(OH), Cu(OH), Hg(OH), Sn(OH), Cr(OH), A(OH), BaF, MgF, PbF, SrF, CaF, 2.4 x 10-5 X 10-8 x 10-8 1.9 x 10-12 1.6 x 10-16 4.5 X 10-17 1.6 x 10-19 3 2 x 10-16 4 Carbonates 7.9 x 10-10 3.9 x 10-11 X 10-26 NiCO, CaCO, BaCo, SrCO, CuCO, ZnCO, MnCO, 1.4 x 10-7 3 10-27 4.7 x 10- 6.7 x 5 x 6 x 10-38 2.5 x 10-43 Chlorides 10-31 1.6 x 10- 1.7 x 10-10 1.1 x 10-18 1.6 x 10-9 7 x 10-10 2.5 x 10-10 10-33 PBCI, AgCi Hg,Cl, Fe(OH), Co(OH), Sulfides 2 x 10-10 8.8 x 10-11 2.1 x 10-11 Bromides X 10-16 X 10-19 3 x 10-21 X 10-22 2.5 x 10-22 X 10-26 1.0 x 10-28 MnS 7. PbBr, AgBr Hg, Br, 4.6 x 10-6 5.0 x 10-13 Feco Ag,CO, CdCo, PBCO, MgCO, Hg,CO, Fes 4 8.2 x 10-12 5.2 x 10-12 1.5 x 10-15 1 x 10-15 NiS 1.3 x 10-22 Cos ZnS lodides Pbl, Agl…The decomposition reaction of atmospheric peroxyacetylnitrate (PAN) to products was studied, and the following rates were obtained. Temperature, °C Rate constant, s 1 0.00 5.60 x 10-6 10.0 3.20 x 10-5 20.0 1.60 × 10-4 30.0 7.60 x 10-4 43. Fit this data into the Arrhenius equation. Give the values of the following: Slope = [ Select] y-intercept = [Select] %3D
- A base is added to a 0.050 M solution of MnCl2, raising the pH gradually. Calculate the pH of the solution when 70 of the manganese has precipitated? Table 5-7 Solubility-Product Constants, K, at 25°C Fluorides Chromates (cont.) Ag, Cro, PbCro, Hydroxides (cont.) Ni(OH), Zn(OH), Cu(OH), Hg(OH)2 Sn(OH), Cr(OH), Al(OH), Fe(OH), Co(OH), Sulfides Baf, MGF2 PbF, SrF, CaF, 2.4 x 10-6 1.9 x 10-12 1.6 x 10-16 8 x 10-8 X 10-8 7.9 x 10-10 3.9 x 10-11 2 x 10-16 4.5 X 10-17 4 1.6 x 10-19 X 10-26 X 10-27 6.7 x 10-31 Carbonates NiCO, CaCO, BaCO, SrCO, CuCO, ZnCO, MNCO, FeCo, Ag,CO, CdCo, PbCO, M9CO, Hg,CO, 1.4 X 10-7 4.7 x 10-9 3. Chlorides 1.6 x 10-9 PbCl, AgCI Hg,Cl, х 10-33 X 10-38 2.5 x 10-43 1.6 x 10-5 X 10-10 2.5 x 10-10 2 x 10-1o 8.8 x 10-11 2.1 X 10-11 7 1.7 x 10-10 1.1 X 10-18 6. Bromides PbBr2 X 10-16 X 10-19 X 10-21 5 x 10-22 2.5 x 10-22 X 10-26 1.0 x 10-28 MnS 4.6 x 10-6 5.0 x 10-13 Fes 4. AgBr Hg,Br, 8.2 x 10-12 NiS Cos Zns 1.3 x 10-22 3 5.2 x 10-12 1.5 x 10-15 1 x 10-15 9.0 x 10-15…The decomposition reaction of atmospheric peroxyacetylnitrate (PAN) to products was studied, and the following rates were obtained. Temperature, °C Rate constant, s1 0.00 5.60 x 10-6 10.0 3.20 x 10-5 20.0 1.60 x 10 4 30.0 7.60 x 10-4 43. Fit this data into the Arrhenius equation. Give the values of the following: Slope = ( Select ) y-intercept = I Select] Pearson coefficient (R) = [ Select ] activation energy of this reaction in kJ/mol = [Select ] collision frequency factor A = I Select]Iodine values change during oil hydrogenation. Why these values change during hydrogenation and why would one wish to hydrogenate edible oils?