Q: 3.120 A mixture of NaBr and Na2SO4 contains 29.96 percentNa by mass. Calculate the percent by mass…
A: Solution- Molar masses of alll which we required-Na-23.00 g/molBr- 32.07 g/molS- 16.00…
Q: (a) Does the percent by mass of each element in a compounddepend on the amount of compound? Explain.…
A: a) In a molecule of calcium chloride, there is one calcium atom and two atoms of chlorine. The total…
Q: 2- Calculate the empirical fomula of the compound composed of 38.67 % C, 16.22 % H, and 45.11 %N by…
A: To calculate the empirical formula we have to calculate the number of mole of each elements in the…
Q: A tube of Thothpaste contains 0.76 g of sodium monofluorphosphate (Na2PO3F) in 100 mL. a)what mass…
A: Mole is the amount of the substance that contains the same number of particles or atoms or…
Q: A binary covalent compound contains 78.3% baron and the rest is hydrogen. Its molar mass is…
A: We have Percentage of Boron (B)=78.3% Percentage of Hydrogen (H)=100-78.3=21.7% Atomic mass of…
Q: A chromium-containing compound has the formula Fe,Cr,O, and is 28.59% oxygen by mass. Findx and y.
A:
Q: 3.135 A certain metal M forms a bromide containing 53.79percent Br by mass. What is the chemical…
A: Let the mass of the compound be 100 g. Then the mass of the Br is 53.79. Calculate the mass of the…
Q: Howmany carbon atoms are present in one mole of 12C?
A: One mole of any substance contains: These particles may be atoms, molecules or ions.
Q: Combustion of a 1.505 g sample of thiophene, a carbon–hydrogen–sulfur compound,yields 3.149 g 0.645…
A: Thiophene is composed of carbon, hydrogen, and sulfur. On combustion, it will give carbon dioxide,…
Q: A binary compound of nickel and oxygen contains 78.06% nickel by mass. Is this a stoichiometric or a…
A: Given information: A binary compound of nickel and oxygen contains 78.06% nickel by mass. Let mass…
Q: A compound has the empirical formula C6H7N and a formula mass of 186.24 g/mol. What is the molecular…
A: Answer: Option d. C12H14N2 is the correct molecular formula. Given,The empirical formula=C6H7N…
Q: Use ammonia (NH3) to explain what is meant by thepercent composition by mass of a compound.
A: Ammonia was used to show, what is meant by percent composition by mass of a compound has to be…
Q: How many grams of K2CrO4 are found in a sample containing 0.186 moles of this compound?
A:
Q: 1. An organic compound with a molar mass of 183.18 g/mol has the following mass percents ol each…
A: An organic compound is having molar mass = 183.18 g/mol Portion of Carbon = 39.34 % of 183.18 = 72…
Q: How many particlcs arc there in 1.43 grams of a molccular compound with a molar mass of 233 g/mol?
A: Given data contains, Mass of molecular compound is 1.43 grams. Molar mass of the compound is 233…
Q: 9.) How many moles of glucose, C6H1206 are in: (a). 538grams (b.) 1.00 grams of this substance?
A: The molar mass of a compound is furnished as the mass occupied by one mole. Hence the ratio of the…
Q: Consider a sample of calcium carbonate in the form of a cubemeasuring 2.005 in. on each edge. If the…
A: Given: Edge length of the cube(Calcium carbonate) =2.005 inch Density of sample= 2.71 g/cm3 To…
Q: thetr many years chloroform (CHCI3) was used as an inhalation anesthetic in spite of the fact the t…
A:
Q: The percent by mass of nitrogen for a compound is found to be 63.7%. Which of the following could be…
A: Given -> Percent by mass of nitrogen = 63.7%
Q: What is the empirical formula (Na?S?O?) for a pure compound consisting of 29.1% sodium, 40.6%…
A: Empirical formula is represents the simplest ratio of atom in a compound.
Q: Actual weight of Na,CO, used mass Na,CO, + beaker = 1니3.525 %3D mass beaker = 142.313 g %3D mass…
A: For Na2CO3, Molecular weight=2(Atomic weight of Na)+Atomic weight of C+3(Atomic weight of O)
Q: How many MOLES of dioxygen difluoride are present in 4.95×1022 molecules of this compound ?
A: We have to calculate the moles of dioxygen difluoride .
Q: How many GRAMS of dioxygen difluoride are present in 4.95×1022 molecules of this compound ?
A: Number of molecules of O2F2 = 4.95×1022
Q: How many molecules are contained in a pentanal (C5H10O) sample with a mass of 5.27 g?
A: 1 mole of any substance contains Avagadro number (6.023 *1023) of species. therefore, 1 mole of…
Q: A white-colored solid contains 75.26% Ag by mass, and the rest is chlorine. Enter the empirical…
A:
Q: What is a MOLE? O Aunit of substance containing a certain amount expressed in grams O Aunit of…
A: The given question asks to select the right option that accurately defines a mole of any substance.
Q: calulate the mass percent of magnesium (Mg) in magnesium nitride (Mg3N2)
A: Mass percentage of an element can be calculated by the division of mass of the element by the total…
Q: A chloride of silicon contains 79.1 mass % Cl. (a) What is theempirical formula of the chloride? (b)…
A: Empirical formula It gives the simplest whole number ratio of elements present in a compound. It is…
Q: What are two errros that could cause one of your mass percentages to be too low?
A: Mass percent or weight percent of a component in a substance can be defined as the mass of the…
Q: what’s the molecular formula?
A:
Q: A molecule is found to contain 64.27% by mass C, 7.191% by mass H, and 28.54% by mass O. It’s molar…
A: The given organic compound is made up of C, H and O atoms. Molar mass of the given compound is 168…
Q: A binary compound between an unknown element E and hy- drogen contains 91.27% E and 8.73% H by mass.…
A: using the molecular formula is E3H8 Given moles of E presents in compound is 3
Q: The molecular formula of allicin, the compound responsiblefor the characteristic smell of garlic, is…
A: The molecular formula of allicin is C6H10OS2. The molar mass of allicin is calculated as,
Q: Calculate the mass percent of H in C,HgO.
A: Since, molar mass of carbon = 12.0107 g/mol Molar mass of hydrogen = 1.0079 g/mol Molar mass of…
Q: 3.1. How many moles and how many molecules are there in 750g of a) H2 b) H2O c) H2SO4? How many…
A: Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: Is the Kalve efn when the empircal formula 1o C3 Hs and the molecuiar mass IS 20514 . g/maiz
A:
Q: analysis shows the compound is composed only of 88.81% C and 11.19% H by mass. What is the molecular…
A:
Q: What is the mass grams that are in 6.30 × 1025 molecules of 1,?
A: Given is, Molecules of I2= 6.30×10^25 And we know, Avogadro's number 6.022×10^23 Molar mass of I2=…
Q: Name: NetID: 1. What is the molecular mass (in amu) and molar mass (in g mol) for chloroform…
A: We know that Molar mass : The molar mass is the sum of mass of each element (g) present in Compound…
Q: The percent by mass of nitrogen for a compound is found to be 30.5%. Which of the following could be…
A: Percentage by mass of element in a compound = Mass of element × 100 / Mass of compound
Q: Please help with 4c, 4d, and 4e. We havent learned kaw of equivalents so please do 4c a different…
A: Given information:Mass percent of bromine in the compound = 51.83 %
Q: A recently created iron-carbon compound is a component of Ironman’s armor. It was created by…
A: Given : Mass of Fe reacted = 5.214 g And mass of compound formed = 6.055 g Assuming the empirical…
Q: Calculate the percent oxygen by mass in disilicon trioxide(Si2O3) to 3 significant figures.
A: Molar mass of O = 15.999 g/mol.Molar mass of Si2O3 = 104.168 g/mol.
Q: 6. Calculate the following quantities in 0.185 mole of C,H1¼O. a. moles of C b. moles of 0 c. atoms…
A: “Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: The number of molecules in 49.1 grams of carbon tetrafluoride would be less or greater than…
A: Since number of molecules = moles X Avogadro's number So if moles is less than 1 than the the number…
Q: of 7.5 x 10^23 atoms of Br? * A. 7,5x1batoms br x G02 MỖ atons Br Imol Br B. 7.5x1b tome br x_ Imol…
A:
Q: ss in grams of CH:OH (MM = 32.04 g/mol) would nee
A: Molality (m) = moles of solute/maas of solvent(kg) Moles = mass/MM = w/32.04 Mass of solvent=…
Q: e the % by mass of Fe to T
A:
Q: A 0.235 g sample of Manganese (Mn) was heated in a crucible and produced 0.372 g of a compound…
A: Given: Mass of Manganese= 0.235 g Mass of compound, MnxOy= 0.372 g To estimate: Empirical formula of…
Q: A sample of a compund made entirely from copper and oxygen was founf to have a total mass of…
A: Given,Total mass of sample = 0.1431gMass of copper = 0.1271gThe mass of oxygen is determined as,
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- Copper(I) iodide (CuI) is often added to table salt as a dietary source of iodine. How many moles of CuI Are contained in 1.00 lb (454 g) of table salt containing 0.0100% CuI by mass?Chromium(lll) nitrate forms a hydrate that is 40.50% water by mass. What is its chemical formula?Sodium borate decahydrate, Na2B4O710H2O is commonly known as borax. It is used as a deodorizer and mold inhibitor. A sample weighing 15.86 g is heated until a constant mass is obtained indicating that all the water has been evaporated off. (a) What percent, by mass of Na2B4O710H2O is water? (b) What is the mass of the anhydrous sodium borate, Na2B4O7?
- A binary compound of magnesium and nitrogen is analyzed, and 1.2791 g of the compound ¡s found to contain 0.9240 g of magnesium. When a second sample of this compound is treated with water and heated, the nitrogen is driven off as ammonia, leaving a compound that contains 60.31% magnesium and 39.69% oxygen by mass. Calculate the empirical formulas of the two magnesium compounds.A chemist prepared a compound that she thought had the formula FeI3. When the compound was analyzed, it contained 18.0% Fe and 82.0% I. Calculate the mass percentage composition expected for FeI3 and compare the result with that found in the analysis. Is this the correct formula of the compound?Hexachlorophene, a compound made up of atoms of carbon, hydrogen, chlorine, and oxygen, is an ingredient in germicidal soaps. Combustion of a 1.000-g sample yields 1.407 g of carbon dioxide, 0.134 g of water, and 0.523 g of chlorine gas. What are the mass percents of carbon, hydrogen, oxygen, and chlorine in hexachlorophene?
- A major textile dye manufacturer developed a new yellow dye. The dye has a percent composition of 75.95% C, 17.72% N, and 6.33% H by mass with a molar mass of about 240 g/mol. Determine the molecular formula of the dye.Hexamethylenediamine (MM=116.2g/mol), a compound made up of carbon, hydrogen, and nitrogen atoms, is used in the production of nylon. When 6.315 g of hexamethylenediamine is burned in oxygen, 14.36 g of carbon dioxide and 7.832 g of water are obtained. What are the simplest and molecular formulas of this compound?substance A2B is 60% A by mass. Calculate the present B (by mass) for AB2 .
- Suppose that Si28(1428Si) is taken as the standard for expressing atomic masses and assigned an atomic mass of 10.00 amu. Estimate the molar mass of sodium nitride.When 9.59 g of a certain vanadium oxide is heated in the presence of hydrogen, and a new oxide of vanadium are formed. This new vanadium oxide has a mass of 8.76 g. When the second vanadium oxide undergoes additional heating in the presence Of hydrogen, 5.38 g of vanadium metal forms, a. Determine the empirical formulas for the two vanadium oxides. b. Write balanced equations for the Steps of the reaction. c. Determine the mass of hydrogen needed to complete the steps of this reaction.The empirical formula of a gaseous fluorocarbon is CF2 . At a certain temperature and pressure, a 1-L volume holds 8.93 g of this fluorocarbon, whereas under the same conditions, the 1-L volume holds only 1.70 g gaseous fluorine (F2) . Determine the molecular formula of this compound.