experiment was done to determine the composition of a mixture of sodium chloride and sodium carbonate. A sample of the mixture with a mass of 5.66 grams was heated until gas production stopped. After the reaction, the sample had a mass of 4.14 grams. Assuming that sodium chloride does not react and that the decrease in mass was due to the creation of CO2 gas, what wass the mass of Na2CO3 in the sample?  Report your answer with three significant figures.

Q: A sample weighing 3.137 g is a mixture of Fe₂O3 (molar mass = 159.69 g/mol) and Al₂O3 (molar mass =…

A:

Q: Write a balanced equation for the combustion of gaseous propane (C3H8), a minority component of…

A: Propane is a flammable gas and burns easily in the presence of enough oxygen. The combustion of…

Q: If 2 moles of water decomposes, the products that will form are 2 moles of hydrogen gas and one mole…

A: Given, Moles of water decomposed = 2 moles.

Q: Suppose a piece of silver jewelry contains 7.78×1022 atomsatoms of silver (AgAg).

A:

Q: A sample of pure alumina hydrate was obtained from a bag of flame retardant. A 5.000 g sample of the…

A: Weight of the hydrated aluminum oxide (Al2O3 . xH2O) = 5.000 g Weight of the anhydrous alumina (when…

Q: and

A: The balanced chemical reaction between CaCO3 and HCl as well as MgCO3 and HCl: Reaction 01: CaCO3 +…

Q: A crucible is placed on a balance and is found to have a mass of 26.639 grams a sample of…

A: Mass of crucible = 26.639 g Mass of crucible + mass of Na2SO4·xH2O = 27.085 g Therefore mass of…

Q: The elemental composition of the welding gas acetylene (C2H2) is 92.24% C and 7.76% H by mass. What…

A: Since from the formula of acetylene, we can say that the number of atoms of C and H are same in it.…

Q: To obtain pure lead, lead (II) sulfide is burned in an atmosphere of pure oxygen. The products of…

A:

Q: Consider the reaction of solid P4 and chlorine gas to form gaseous phosphorus trichloride. a) Write…

A:

Q: 100.0 g lead(II) nitrate is reacted with 50.00 g potassium iodide (in plenty of water). How many…

A: The chemical equation for the reaction between lead(II) nitrate and potassium iodide is given as -…

Q: The following reaction describes the production of elemental sulfur. Calculate the mass of elemental…

A: Given- Weight of dihydrogen sulphide =15.39 g  H2S(g)+O2(g) -> S8(s) + H2O(g)

Q: The amount of product that can be produced depends only on the amount of the limiting reactant…

A:

Q: A student performed an experiment to determine the empirical formula of aluminum chloride. In this…

A: (a)Since Al is completely reacted, the mass of Al in the aluminum chloride formed during the…

Q: A 5.87-gram sample of powdered nickel is first placed into a crucible; the nickel and crucible are…

A: We have to Formula for compound .

Q: A student obtains a mixture of the chlorides of two unknown metals, X and Z. The percent by mass of…

A: Given: Mixture of metal X and Z. And mass percent of X and Z in the mixture.

Q: A mixture contains NaHCO3 together with unreactive components. A 1.62 g sample of the mixture reacts…

A: Use stoichiometry of the reaction to get answer.

Q: Gaseous butane (CH3(CH2)2CH3) will react with gaseous oxygen (O2) to produce gaseous carbon dioxide…

A: 2C4H10 + 13O2 = 8CO2 + 10H2O

Q: When a sample of solid potassium chlorate is heated strongly, a decomposition reaction occurs. Solid…

A: Mole is calculated by dividing the given mass with molecular mass. When a sample of solid potassium…

Q: Ammonia is produced from the reaction of nitrogen and hydrogen according to the following balanced…

A: Given information,        1.40 × 103 g N24.60 × 102 g H2

Q: composition- a compound breaks down into elements and/or simpler compounds. KNO; ? KNO, + O2 NaN, ?…

A: Decomposition reaction of KNO3 is given by:   KNO3 → KNO2 + O2 There are 3 Oxygen atoms on reactants…

Q: A crucible is placed on a balance and is found to have a mass of 26.639 grams a sample of…

A: Since on heating the compound, the mass of water will be lost as it will get vaporised  Hence the…

Q: A compound containing the elements C , H , N , and O is analyzed. When a 1.2359 g sample is burned…

A: Given L The compound contains elements C, H, N and O only. Mass of compound = 1.2359 g Mass of H in…

Q: (Mass of crucible is 24.98g. The mass of the cover is 11.36g. The mass of the crucible, cover, and…

A: The mass % is equal to the ratio of the mass of the substance to the total mass multiplied by 100.…

Q: Suppose 7.60 g  of CH4 is allowed to burn in the presence of 16.90 g  of oxygen.…

A: The required balanced equation is given below.

Q: Benzene (C6H6) is a liquid with a density of 0.874 g cm-3. It reacts with oxygen to give carbon…

A: Given: Volume of benzene reacted = 21.3 cm3 Density of benzene = 0.874 g cm-3 We have to calculate…

Q: Write the balanced chemical equation for the reaction of magnesium metal with oxygen gas to form…

A: Mass of Mg = 10.0 g Moles of Mg = 10.0g/24.305g/mol = 0.411 mol Mass of Oxygen = 10.0g Moles of…

Q: A sample of rubbing alcohol solution contains ethanol, C2H5OH(l). If the sample contains 1.25 × 1023…

A: Given;