Fingernail-polish remover is primarily acetone (C3H6O). Part A How many acetone molecules are in a bottle of acetone with a volume of 425 mL? (density of acetone = 0.788 g/cm³.) Express the number of molecules to three significant figures. Η ΜΕ ΑΣΦ N = Submit Request Answer Provide Feedback ? acetone molecules Next >
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- Most chemistry laboratories have balances that can weigh to the nearest milligram. Would it be possible to weigh 5.31E+18 molecules of octadecane, C18H38, on such a balance? Enter your answer in the form 1.00E2 for scientific notation. mass of 5.31E+18 molecules C18H38 = i g. Thus, it is v to weigh 5.31E+18 molecules of C18H38. possible not possibleIntroduction to Chemistry: Chemical Formulas as Formulas: Converting between Grams of a Compound and Gram of a Constituent Element. Iron is found in Earth's crust as several iron compounds. Calculate the mass (in kgkg) of each compound that contains 7.1×103 kg of iron. Given: Fe2O3 (hematite) Express your answer in kilograms to two significant figures. The answer : Mass = 1.1 x 104 kg But I don't know how it got here. I keep getting 4.9 kg for my answer. Converted it to kilograms also is a challenge for me. I know that 1 g = 1000 kg and that 1 kg = 0.001 g. But i'm not sure how to apply it.In the equation SiO2 + 2C Si + 2CO, if 24.0 grams of silicon dioxide is used, how many grams of carbon monoxide is produced? For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). T T T T Paragraph Arial v 3 (12pt) v = - E-T- T T e O f Mashups 田国围口□ HTML CSs
- The combustion of ammonia in the presence of excess oxygen yields NO2 and H2O: 4 NH3 (g) + 7 02 (g) → 4 NO2 (g) + 6 H2O (g) The combustion of 218 g of ammonia consumes g of oxygen. Atomic weights: N=14.01, H=1.01, O=15.99. Input values only with 2 decimal places.Most chemistry laboratories have balances that can weigh to the nearest milligram. Would it be possible to weigh 5.88E+18 molecules of octadecane, C18H38, on such a balance? Enter your answer in the form 1.00E2 for scientific notation. mass of 5.88E+18 molecules C18H38 = i g. Thus, it is v to weigh 5.88E+18 molecules of C18H38. bộThe common pain relievers – aspirin (C9H8O4), acetaminophen (C8H9NO2), and naproxen sodium (C14H13O3Na) – are available in tablets containing 125 mg of the active ingredient. Express your answers to three significant figures. 125 mg aspirin = ? C9H8O4 molecules 125 mg acetaminophen = ? C8H9NO2 molecules 125 mg naproxen sodium = ? C14H13O3Na molecules
- Fingernail–polish remover is primarily acetone (C3H6O). How many acetone molecules are in a bottle of acetone with a volume of 325 mL? (density of acetone = 0.788 g>cm3)Earth’s surface area is 5.1 x 108 km2, its crust has an average thickness of 35 km and an average density of 2.8 g/cm3. The two rarest (non-radioactive) elements in the crust are ruthenium and rhodium, each with an abundance of 1.0 x 10-4g/metric ton crust. What is the total mass of these two elements in the earth’s crust? (1g = 1 x 10-6 metric ton)Suppose you need 6.0 m of Grade 70 tow chain, which has a diameter of 3/8" and weighs 2.16 kg/m, to tow a car. How would you calculate the mass of this much chain? Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols. mass of chain- 0.0 X H 0²
- From the moles of magnesium hydroxide (see attached), calculate the grams of magnesium hydroxide this corresponds to (the molar mass of magnesium hydroxide is 58.305 g/mol) and then convert this to milligrams. This is how many mg of Mg(OH)2 are in the initial mass of milk of magnesia that you used. From this ratio (mg of Mg(OH)2 in grams of milk of magnesia), calculate how many mg of Mg(OH)2 are in a standard 15 mL dose of the milk of magnesia. (The density of milk of magnesia is 1.06 g/mL, use that to convert "15 mL" to units of grams.)A chemist adds 215.0 mL of a 0.047 mmol/L sodium thiosulfate (Na₂S2O3) solution to a reaction flask. Calculate the mass in milligrams of sodium thiosulfa the chemist has added to the flask. Round your answer to 2 significant digits. mg 0 10 X 5320.4 grams of isomaltitol, C12H24O11, was combusted in a furnace completely in an excess oxygen. The products of this reaction are liquid water and gaseous carbon dioxide. How much water (in kg) do you expect from this reaction assuming that all of the isomaltitol reacts? Enter your numeric answer in the units of kg. Do not enter the unit. Use enough significant digits to prevent rounding errors. Hint: balance the reaction first. Recall that 1 kg = 1000 g.