The fuel used in many disposable lighters is liquid butane, C4H10C4H10. How many carbon atoms are in 2.00 gg of butane? Express your answer numerically in atoms.
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- 3.68 Magnesium is lighter than other structural metals, so it is increasingly important in the design of more efficient vehicles. Mg2+ ions are present in seawater, and the metal is often prepared by "harvesting" these ions and converting them to Mg metal. The average magnesium content of the oceans is about 1270 g Mg2+ per ton of seawater, and the density of seawater is about 1.03 g/mL. What is the molarity of Mg2+ ions in seawater? The design for a concept car calls for 103 kg of magnesium per vehicle. How many gallons of seawater would be required to supply enough magnesium to build one of these ears?The fuel used in many disposable lighters is liquid butane, C4H10. Butane has a molecular weight of 58.1 grams in one mole. How many carbon atoms are in 1.50g of butane? Express the number of atoms to three significant figures.The fuel used in many disposable lighters is liquid butane, C4H10. Butane has a molecular weight of 58.1 grams in one mole. How many carbon atoms are in 1.00 g of butane? Express the number of atoms to three significant figures.
- The “lead” in lead pencils is actually almost pure carbon and the mass of a period mark made by a lead pencil is about 0.001 g. 3,12 How many carbon atoms are in the period? Express your answer using one significant figure.The fuel used in many disposable lighters is liquid butane, C4H10. Butane has a molecular weight of 58.1 grams in one mole. How many carbon atoms are in 1.50 g of butane?Express the number of atoms to three significant figures.What is the mass, in grams, of 1.40×1021 molecules of aspirin, C9H8O4C9H8O4? Express your answer using three significant figures.
- The formula for carbon tetrachloride is CCl4. How many molecules are in 8.03 grams of carbon tetrachloride? molecules What is the mass in grams of 1.03 x 10^23 molecules of carbon tetrachloride? gramsThe use of freons is being phased out because of the damage these compounds do to the stratospheric ozone layer. One of the freons, CCl2F2, is manufactured from carbon tetrachloride and hydrogen fluoride. a. If a manufacturer wishes to convert 179 kg of carbon tetrachloride into CCl2F2, what is the minimum mass (in kg) of hydrogen fluoride required? b. What is the mass of CCl2F2 will be obtained if this reaction is 100 % efficient? c. What is the mass of HCl will be obtained if this reaction is 100 % efficient?1.Which of the following statements about a compound is incorrect? (a) A molecule of a compound has atoms of different elements. (b) A compound cannot be separated into its constituent elements by physical methods of separation. (c) A compound retains the physical properties of its constituent elements. (d) The ratio of atoms of different elements in a compound is fixed. Which of the following statements is correct about the reaction given below? 4Fe + 3O2 → 2Fe2O3 (a) Total mass of iron and oxygen in reactants = total mass of iron and oxygen in product therefore it follows law of conservation of mass. (b) Total mass of reactants = total mass of product, therefore, law of multiple proportions is followed. (c) Amount of Fe2O3 can be increased by taking any one of the reactants (iron or oxygen) in excess. (d) Amount of Fe2O3 produced will decrease if the amount of any one of the reactants (iron or oxygen) is taken in excess.
- What is the mass in grams of 9.25 x 10^24 molecules of CO2? Write the answer in decimal form.MgNH4PO4•6H2O loses H2O in a stepwise fashion as it is heated. Above 100 degrees celsius, the anhydrous material is formed. What is the percentage of phosphorus in the anhydrous material?Enter your answer with 4 significant figuresMethane gas, CH4, reacts with oxygen according to the following equation. If 42.00 mol of methane react completely with enough oxygen, how many mols of water are produced? Express your answer with the correct number of significant figures. CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) Methane
