Mass percent question: In a universe far far away, all of their elements happen to weigh nice even number that are easy to do calculations with. So for this question we will be using their elements/molecules. Formatting issues: Don't worry about sig figs. Just put your number as you calculate it. Do not include the percent sign or any units in your answers. Canvas just doesn't handle this stuff well :-(. T=10 g/mol P= 1 g/mol L= 2 g/mol For the molecule T2P10LS The molecular mass is The mass percent T is The mass percent P is The mass percent L is When you add up the mass percents you get

O CHEMICAL REACTIONS 3/5 Finding mole ratios from chemical formulae This is the chemical formula for methyl tert-butyl ether (the clean-fuel gasoline additive MTBE): CH,OC(CH,), A chemical engineer has determined by measurements that there are 6.6 moles of carbon in a sample of methyl tert-butyl ether. How many moles of hydroger are in the sample? Be sure your answer has the correct number of significant digits. mol Explanation Check © 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center 28°C Mostly cloudy pe here to search US

Element is Gold use 6.02 x 1023 for Avogadro's number or you may be counted wrong!!! 1. What is the symbol for your element? (Must be after Xe in Periodic Table). Au 2. What is the molar mass of your element? (include units). 197 g/mol 3. How many atoms are in a mole of your element? (No calculation needed) 4. If you have 2.15 x 1024 atoms of your element, how many moles is that? 5. If you have 2.15 x 1024 atoms of your element, how many grams is that? 6. Theoretically speaking, if your element was in the gas state at STP, how many liters is 56.87 grams of your element? (Most elements are not gases at STP so this question is just theoretical) You must solve this using CHM 130 knowledge only.

3 molecule(s) of dinitrogen pentoxide contains: How many moles? (Enter your answer in scientific notation. For example, 0.100 is 1.00E-1). How many grams? (Enter your answer in scientific notation. For example, 0.100 is 1.00E-1). How many nitrogen atoms? How many oxygen atoms? How many total atoms?

1) Hypothetical Data for AnalysisAn oxide of iron is 69.94% iron by mass. Calculate its empirical formula and determine the name of the ionic compound. (Hint: assume you have a 100 g sample of the oxide of iron. How many grams would be iron? Then how many grams would be oxygen? Convert those to moles. Find the ratio. Find the nearest whole number ratio). Then determine its name

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Arrange the fertilizers in decreasing order of mass percentage of nitrogen. Highest percent nitrogen (NH,),SO, (NH,),HPO, NH, KNO, (NH)H₂PO4 NH,NO, Lowest percent nitrogen Answer Bank