How many molecules are in 2.50 moles of CO2? (please provide your answer with units, in scientific notation and the correct number of significant digits.)
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Q: The number of moles(correct significant figures) in 10.0 grams of CO2 is:
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- What is the maximum mass of pure iron that could be extracted from 80.0g of hematite, a iron ore with the chemical formula Fe2O3 ? Be sure your answer has a unit symbol, if necessary, and is rounded to the correct number of significant digits.How many moles of NaOH are in 13.39 mL of 1.38 M NaOH? Do NOT place the answer in scientific notation and be sure to include the zero before the decimal.If you have 152 g of glucose (C₆H₁₂O₆), how many moles are present? Use the correct number of significant figures.
- 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 atoms of hydrogen are in 2.22E1 g of methane? Respond with the correct number of signficant figures in scientific notation.Imagine you are working in a lab, and you want to prepare a solution of cobalt(II) chloride. You know that the chemical is purchased in the solid form as a hydrate. You find the reagent bottle containing a vibrant purple solid; however, the chemical formula and molecular weight are obscured such that you can't read how many waters are associated with the ionic solid. You don't want to be wasteful, so you decide to determine the number of waters by heating the solid and taking the mass difference (a la the hydrate lab!). You carefully weigh out exactly 1.0096 g of the unknown hydrate. You gently heat the compound over a low flame until the mass stops changing and the deep purple color fades. The mass of the remaining compound is 0.6492 g. Determine the chemical formula of the original compound.
- What is the maximum mass of pure titanium that could be extracted from 80.0 g of ilmenite , a titanium ore with the chemical formula FeTiO 3 Be sure your answer has a unit symbol , if necessary , and is rounded to the correct number of significant digitsA sample of oxygen contains 7.1 x 1020 atoms. How many moles are in this sample? Your answer should be rounded to the correct number of significant figures and written in scientific notation.What is the mass in grams of 9.35 x 1024 molecules of CO2 ? Please express in decimal form, not scientific notation.
- How many moles are in 239 g of iron? Express your answer to three significant figures.How many atoms of fluorine are in 1.1E0 moles of CF4? Respond with the correct number of significant figures in scientific notationA high-performance heater that burns propane, C3H8(g), is adjusted so that 100.0 g of O2(g) enters the system for every 100.0 g of propane. Calculate the mol ratio of oxygen to propane. Write the answer as a decimal containing number.