what is the percent of SiO2 in the starting mixture?

Q: O₂(g) + 2 H₂(g) → 2 H₂O(1) - Assume 0.250 mol O₂ and 0.810 mol H₂ are present initially. After the…

A: The stoichiometry of the balanced chemical reaction states that one mole of oxygen reacts with two…

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

A:

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: Morphine (C₁₇H₁₉NO₃) is a painkiller in the opiate family. A sample of morphine was discovered that…

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 mixture is 19.9% NaCl, 21.0% CaCl2, and 59.1% NaBr. What mass of the mixture contains 0.485 moles…

A: mass of the mixture that contains 0.485 moles of chloride ions moles of sodium ions present in 24.0…

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: 2. A binary mixture of 0.437 g BaCl2•2H2O (molar mass = 244.27 g/mol) and 0.284 g Na2SO4 (molar mass…

A: Can find the answer in the image attached below

Q: Morphine (C₁₇H₁₉NO₃) is a painkiller in the opiate family. A sample of morphine was discovered that…

A: The reaction of the combustion of morphine is: 4C17H19NO3+85O2→68CO2+38H2O+4NO2 Calculation of no.…

Q: The aluminum in a 0.767 g sample of an unknown material was precipitated as aluminum hydroxide,…

A: given: mass of sample of unknown material =0.767 g mass of aluminium oxide produced = 0.143 g…

Q: The sodium salt of cacodylic acid, a weak acid, has the formula NaO2As(CH3)2.3H2O. Its molar mass is…

A: The buffer we have here is of a weak acid and and its conjugate base where cacodylic acid is the…

Q: If 17.15 g of Na 2SO 4 and 19.61 g of BaCl 2 are dissolved in water and then mixed together, what is…

A: Given: Mass of Na2SO4 taken = 17.15 g. And mass of BaCl2 taken = 19.61 g. The balanced precipitation…

Q: CH4(g)   +    2 O2(g)  ------->   CO2(g)   +    2 H2O(g) What mass of water is produced by the…

A: 1- First determine the moles of methane :  moles of methane = ( mass / molar mass)  moles of methane…

Q: Morphine (C₁₇H₁₉NO₃) is a painkiller in the opiate family. A sample of morphine was discovered that…

A: Given: When morphine undergoes combustion, carbon dioxide is produced. Mass of mixture            =…

Q: Al4C3 (s)    +  12 H2O (l)     →   4 Al(OH)3 (s)   +  3 CH4 (g) In this reaction, 0.3455 mol of…

A:

Q: Suppose a student starts with 2.3865 g of a sand mixture and separates the components into 1.3012 g…

A: The objective of this question is to calculate the percentage of SiO2 in the starting mixture of…

Q: A 10.00 g sample mixture dissolved in water. The pe Na₂CO, and 15% NaCl. alculate the % NaCl in the…

A:

Q: 13. Consider the following reaction. CaCl2(aq) + 2AGNO3(aq) 2A9C((s) + Ca(NO3)2(aq) Suppose that you…

A: Given data/information Reaction :      CaCl2 (aq) + 2 AgNO3 (aq) → 2 AgCl(s) + Ca(NO3)2 (aq)…

Q: Suppose a student starts with 2.4319 g of a sand mixture and separates the components into 1.3012 g…

A: percent of SiO2 in the starting mixture =    =Mass of SiO2 × 100/ Total Mass of the mixture =…

Q: A bright chrome yellow color is the main pigment in the paint used to create the yellow lines seen…

A: Number of moles - Ratio of given mass of substance to the molar mass of substance is called number…

Q: The following variables (A and B) are imaginary elements.  The cation A2+ and the anion B3- formed…

A:

Q: For the chemical reaction below, determine the amount of HI produced when 3.29E+0 g of hydrogen is…

A:

Q: Morphine (C₁₇H₁₉NO₃) is a painkiller in the opiate family. A sample of morphine was discovered that…

A: Mass % of morphine = Mass of morphine x 100/Mass of mixture

Q: An alloy is found to be 41.8% Zn and the rest is Cu. If 15.0 g of Cu is added to 45.0 g of This…

A: Mass of the alloy = 45g% of copper in the alloy = (100-41.8) = 58.2%% of zinc in the alloy =…

Q: When a solid mixture of MgCO3 and CaCO3 is heated strongly, carbon dioxide gas is given off and a…

A: % of MgCO3 = (mass of MgCO3 / mass of sample )*100

Q: Morphine (C₁₇H₁₉NO₃) is a painkiller in the opiate family. A sample of morphine was discovered that…

A: Molar mass of morphine is 285.34 g/mol. When a mixture of NaCl and morphine undergoes combustion,…

Q: How many moles of sodium chlorate (NaCIO3) are required to produce 0.235 mol O2? 2 NaCIO3(s) – 2…

A:

Q: A 12.21 g sample of a compound that contains sulfur is analyzed by precipitating all the sulfur as…

A: Given: The mass of the sample = 12.21 g The mass of BaSO4 = 11.227 g Standard data: The molar…

Q: A sample of a substance (containing only C, H, and N) is burned in oxygen. 3.375 g of CO2,…

A: Let the compound be CxHyNz. Calculation of no. of moles of CO2 produced: n=given massMolar…

Q: Suppose a student starts with 2.4464 g of a sand mixture and separates the components into 1.3012 g…

A: According to the question, we had a sand mixture consisting of NaClNaCl, CaCO3CaCOX3, and SiO2SiOX2.…

Q: Naphthalene, the active ingredient in one variety of mothballs, is an organic compound that contains…

A: Given, Mass of CO2 = 69.00mg Mass of H2O = 11.30mg Mass of naphthalene = 20.10mg

Q: Morphine (C₁₇H₁₉NO₃) is a painkiller in the opiate family. A sample of morphine was discovered that…

A: According to the mole concept, in terms of mass, the amount of substance in moles is equal to the…

Q: Morphine (C₁₇H₁₉NO₃) is a painkiller in the opiate family. A sample of morphine was discovered that…

A: Given: mass of mixture = 2.00 g mass of CO₂ = 3.97 g molar mass of CO₂ = 44.01 molar mass of…

Q: Consider the following reaction: 2 NH, (9) + 3 Cl, (9) → N, (9) + 6 HCI (g) A mixture is prepared…

A: According to the balanced chemical equation: 2 moles of ammonia requires 3 moles of chlorine so, 15…

Q: Sodium sulfate is known to form three different hydrates. The molar mass of a hydrate of sodium…

A: Given,  molar mass of general formula Na2SO4 · n H2O is 322.1 g/mol.

Q: How many grams of Ca(NO3)2 can be produced by reacting excess HNO3 with 6.55 g of Ca(OH)2?

A: