Mercury can be obtained by reacting mercury(II) sulfide (show below) with calcium oxide. If you began with 142.7 grams of mercury(II) sulfide and mixed it with excess amounts of calcium oxide, how many moles of calcium sulfide will you make? 4 HgS (s) + 4 CaO (s) --> 4 Hg (I) + 3 CaS (s) + 1 CaSO4 (s) `round your answer using appropriate sig fig rules Type your answer...

Q: copper sulphate (CuSo4) with a concentration of 0.00095 mol l-1. If they wanted to prepare one litre…

A: Here, Molecular weight of CuSO4= RAM(Cu)+ RAM(S)+ 4×RAM(O).…

Q: Phosphorus trichloride can be made by the following reaction: P4(s) + 6Cl2(g) -> 4PCl3(l)  What…

A: Number of moles of P4 reacted = given number / Avogadro number = (10 molecule) / 6.022 x 1023…

Q: 11. For each of the following balanced chemical equations, calculate how many moles of product(s)…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Hydrogen sulfide gas (H2S, 34.08 g/mol) can be produced from the reaction of aluminum sulfide (150.2…

A: Al2S3 (s) + 6 H2O(l)   gives       3 H2S(g) + 2 Al(OH)3(s)

Q: Complete the table below by deciding whether a precipitate forms when aqueous solutions A and B are…

A: -------------------------------------

Q: A titration is performed to determine the amount of sulfuric acid, H2SO4, in a 6.5 mL sample taken…

A:

Q: hydroxide with phosphoric acid where 10.0 mL of 0.150 M magnesium hydroxide is mixed 15.0 mL of…

A: First calculate moles of each reactant by multiply MOLARITY and volume  then find out limiting…

Q: An organic liquid is either methyl alcohol (CH3OH), ethyl alcohol (CH3CH2OH) o a mixture of the two.…

A: The combustion reaction of methyl alcohol and ethyl alcohol:

Q: Below is an unbalanced molecular equation that describes what happens when solutions of cobalt (II)…

A: The unbalanced molecular equation is., Co(ClO4)2 (aq)  +  Na3PO4 (aq) →  NaClO4 (aq) +   Co3(PO4)2…

Q: what mass of nitrogen would result?

A: number of moles = mass/molar mass  so, mass = moles × molar mass

Q: Complete the table below by deciding whether a precipitate forms when aqueous solutions A and B are…

A: Whether or not a reaction forms a precipitate is dictated by the solubility rules. These rules…

Q: A sample of 30.59 g Sr(HCO3)2 is heated and undergoes the decomposition reaction below. Calculate…

A:

Q: xn A Part A: Balanced Chemical Equations (must include physical states) Balanced Total Equation…

A:

Q: A student heated the 3.572 g sample of chromium (III) chloride on a hot plate until no more water…

A: Given that, Mass of hydrated chromium (III) chloride (CrCl3•xH2O) = 3.572 g  [* x = number of moles…

Q: A student carries out the precipitation reaction shown below, starting with 0.030 moles of calcium…

A: a. The given reaction is as follows, 3Ca(NO3)2(aq) + 2Na3PO4(aq) → Ca3(PO4)2(s) + 6NaNO3(aq)

Q: Complete the table below by deciding whether a precipitate forms when aqueous solutions A and B are…

A: Here, we have to find whether a precipitate will form or not when the given solutions are mixed. If…

Q: A student analyzes a sample of rock that contains the element calcium (Ca). In the student's…

A: Given that,182.2 mg of the rock produces 120.7 mg of CaC2O4 on treatment of Na2C2O4 We have to find…

Q: What is the mass in grams of aluminum metal (26.98 g/mol) that reacts to form 2.80 g of iron (55.85…

A: Given, 3 FeO (l) + 2 AI (l) ---> 3 Fe (l) + 1 Al2O3 (s) mass of Iron (Fe) formed = 2.80 g mass of…

Q: Consider the following chemical reaction. 3 Zn(C:H:O2)>(aq) + 2 NasPO:(aq) –→ 6 NaCaHsOz(aq) +…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: Hydrobromic acid dissolves solid iron according to the followiaung reaction: Fe(s)+2HBr(aq)→…

A: The reaction of iron and hydrobromide is given by equation 1.So, from equation (1) one mole of iron…

Q: Cu   +   8HNO3  --> 3 Cu(NO3)2    +  2 NO   +  4  H2O In the above equation how many moles of water…

A: Given  Mass of HNO3 = 197.1 g Number of moles of water = ?

Q: Suppose a 500. mL flask is filled with 1.6 mol of H₂O, 1,5 mol of CO and 0.20 mol of H₂. This…

A:

Q: Suppose a 500. mL flask is filled with 0.20 mol of H,S, 0.90 mol of CS, and 1.4 mol of H,. This…

A: The reaction given is Given : Initial moles of H2S = 0.20 mol Initial moles of CS2 = 0.90 mol…

Q: N2H4 (L) -----> NH3 (g) + N2 (g) How do you balance the equation?  I also need to be able to…

A: Given equation:

Q: student dissolves a 4.56g sample of calcium sulfate in water and adds oxalic acid to precipitate out…

A:

Q: Aluminum metal reacts with bromine according to the following unbalanced equation: Al (s) + Br₂ (1)→…

A: 4. Recall the given unbalanced equation,                      Al s  +  Br2 l  →  AlBr3 sWant to…

Q: 4) A 11.31 g sample of a competitor's "SonicBloom" fertilizer is analyzed for its phosphorus content…

A: #4(a): Given the mass of fertilizer sample taken = 11.31 g Mass of the P containing precipitate,…

Q: In an experiment, 0.2490 g of sodium bicarbonate, NaHCO3(s) was allowed to react with excess…

A: In the given question we have to calculate the percent yield of NaCl in the following reaction,…

Q: 3 Ag2 S (s) + 2 Al (s)- 6 Ag (s) + Al2 S3 (8) Black tarnish on silverware is silver sulfide, Ag₂S. A…

A: The stoichiometry of the balanced chemical reaction states that three moles of silver sulfide reacts…

Q: The following two-step process has a 60.0 % yield for each step. CH4 + 4 Cl2 –→ CCl + 4 HCl CCl4 + 2…

A: Given: The yield percentage of each step = 60.0% Moles of CH4 = 6.00 mol.

Q: One of the challenges astronauts face is in space travel is the build-up of carbon dioxide in their…

A:

Q: Determine the theoretical yield of alum (KAl(SO4)2·12 H2O), in units of g, if a student starts with…

A: Interpretation: The theoretical yield of alum in grams is to be determined. Given: Theoretical yield…

Q: For the following reaction, 99.2 grams of perchloric acid (HClO4) are allowed to react with 27.3…

A: 12 HClO4 (aq) + P4O10 (s) →4 H3PO4 (aq) + 6 Cl2O7 (l) Amount of products depend on the limiting…

Q: Complete the balanced molecular chemical equation for the reaction below. If no reaction occurs,…

A: CaBr2 and AgNO3 undergoes double displacement reaction.Here Ag+ ion combines with Br- to form…

Q: Complete the table below by deciding whether a precipitate forms when aqueous solutions A and B are…

A: The solutions given are,

Q: 1. A student adds 25.27 mL of a 0.750 M Na2SO4 solution to another solution containing 2.50 grams of…

A: Given -> Volume of Na2SO4 = 25.27 ml Molarity of Na2SO4 = 0.750 M Weight of BaCl2  = 2.50 gm

Q: Ca(s) + 2HCI(ag)--> CaClalaq) + H2(g) What is the mass of CaCl, that can be produced from 0.621 g of…

A:

Q: When aluminum is placed in concentrated hydrochloric acid, hydrogen gas is produced. 2A1(s) +…

A:

Q: A titration is performed to determine the amount of sulfuric acid, H2SO4, in a 6.5 mL sample taken…

A: Information of question

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.