How much does 71.98 moles of X weigh in grams? (Assume that the molar mass of X is 39.82 grams per mole.) Report your answer to three decimal places.
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How much does 71.98 moles of X weigh in grams? (Assume that the molar mass of X is 39.82 grams per mole.)
Report your answer to three decimal places.
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- Determine the mass percent of carbon in Fe(C2H3O2)3. Enter your answer with two decimal places.CHEMISTRY FOR ENGINEERS (UPVOTE WILL BE GIVEN. PLEASE WRITE THE COMPLETE SOLUTIONS LEGIBLY. NO LONG EXPLANATION NEEDED. ANSWER IN 4 DECIMAL PLACES. BOX THE FINAL ANSWER/S. The mass of the earth is 5.98 X 1024 kg. How many moles of gold would have this mass? How many moles of aluminum would have this mass?How many moles of aluminum do 5.80×1024 aluminum atoms represent? Express your answer using three significant figures.
- If I weigh 75kg and about 25% carbon by mass, what is the mass of carbon in me? How many moles of carbon in me?If a sample contained 9.65 x 1023 atoms of iodine, how many grams would this be? Round to one decimal point.How many grams of rubidium are in 3.49 x 1024 atoms of rubidium? Enter your answer in decimal form with the correct number of sig figs. Use the proper abbreviation for the units.
- If you have 1.45x10^25 atoms of potassium, how many moles of potassium do have? Round to significant figures.How many helium atoms are there in a helium blimp containing 534 kg of helium? Express the number of helium atoms numerically.Calculate the mass (in grams) of 4.69 x 1024 carbon atoms. Round your answer to two decimal places.
- A sample of a compound is found to contain 21.82 g of carbon, 9.16 g of hydrogen, 20.42 g of oxygen, and 18.44 g of nitrogen. Calculate the percent by mass oxygen in this sample.A scientist has two samples of gas: The first sample contains one mole of argon atoms and has a mass of 39.948 g; the second sample contains one mole of helium atoms and has a mass of only 4.0026 g. How does the number of atoms in each sample compare? Explain.You have a mole of ping pong balls and want to ship them to a near-by town. You have packing boxes that measure 24 inches by 24 inches by 18 inches. How many boxes do you need to pack up all the ping pong balls? The radius of a ping pong ball is 20 mm. If you make any approximations or assumptions, please list them.
