Calculate the mass in grams of (4.33 x 10^21) molecules of SO_3. Express your answer to the correct number of significant figures,in significant and include the unit with your answer.
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- NoneIbuprofen, the anti-inflammatory drug in Advil, has the formula C13H18O2 What is the empirical formula of ibuprofen? Express your answer as a chemical formula. What is the molar mass of ibuprofen? Express your answers to four significant figures and include the appropriate units. How many grams of C are in 0.465 g of ibuprofen? Express your answer using three significant figures and include the appropriate units. How many moles of ibuprofen are in 2.35 g of ibuprofen? Express your answer using three significant figures and include the appropriate units.What is the mass (in kg) of 6.89 × 10^25 molecules of carbon dioxide? Give the answer as a number. The units are understood to be kg.
- How many C atoms are present in the sample of C3H3 with mass 7.11 g? Avogadro's number is 6.022 x 1023. Enter your answer using scientific notation and to three significant digits. C atomsWhat is the mass of 3.5 x 10^-3 molecules of copper (II) carbonate? Use correct significant figures and units.How many formula units are in 30.912 g of potassium permanganate? Give answer to the correct number of significant figures. If exponents are needed, use the format 1.23E+4. Do not include unit or substance for this answer.
- What is the mass of 0.207 moles of C3H9O4? Note: Express your answer in proper significant figures. Write only the numerical answer. Do not include the unit. If your answer is in exponential form, example: 2.05 x 1024, use the following format: 2.05e24The chemical formula for hydrogen bromide is HBr. A chemist determined by measurements that 0.030 moles of hydrogen bromide participate in a chemical reaction. Calculate the mass of hydrogen bromide that participates. Round your answer to 2 significant digits. 0 g x10 × ŚThe chemical formula for dimethyl ether is: CH;OCH3 Calculate the molar mass of dimethyl ether. Round your answer to 2 decimal places. 1 x10 |g.mol
- DUE NOW. Please answer it with the correct significant figures. Thank you!Introduction 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.Aqueous hydrobromic acid HBr will react with solid sodium hydroxide NaOH to produce aqueous sodium bromide NaBr and liquid water H2O. Suppose 79.3 g of hydrobromic acid is mixed with 24. g of sodium hydroxide. Calculate the minimum mass of hydrobromic acid that could be left over by the chemical reaction. Be sure your answer has the correct number of significant digits.