If the mass percent of oxygen in Na2Cr2O7 is 42.8%, what is the mass of oxygen...
If the mass percent of oxygen in Na2Cr2O7 is 42.8%, what is the mass of oxygen atoms in grams in 14.4 grams of Na2Cr2O7?
For your answer, only type in the numerical value with three significant figures. Do NOT include the unit.
Homework Answers
Mass of oxygen in grams with three significant figures is :
6.16
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If the mass percent of oxygen in
Na2Cr2O7 is 42.8%, what is the
mass of oxygen...
If the mass percent of oxygen in Na2Cr2O7is 42.8%, what is the mass of oxygen atoms...
If the mass percent of oxygen in Na2Cr2O7is 42.8%, what is the mass of oxygen atoms in grams in 12.7 grams of Na2Cr2O7?
A photon has a frequency of 6.64 × 1016 s−1. What is the wavelength of the...
A photon has a frequency of 6.64 × 1016 s−1. What is the wavelength of the photon in nm? For your answer, only type in the numerical value with three significant figures. Do NOT include the unit. 1 m = 109 nm, c = 3.0 ×108 m/s
What is the mass percent of potassium chloride when 9.35 grams of potassium chloride is mixed...
What is the mass percent of potassium chloride when 9.35 grams of potassium chloride is mixed into 162.98 grams of water? Choose the answer with the appropriate significant figures and choose the correct unit. Calculate the mass of sodium hydroxide needed to make 125 g of a sodium hydroxide solution that has a mass percent of 10.0%. Choose the answer with the appropriate significant figures and choose the correct unit. 750 mL of a solution is made with 4.00 g...
A. For the reaction 2KClO3(s) ? 2KCl(s) + 3O2(g) calculate how many grams of oxygen form...
A. For the reaction 2KClO3(s) ? 2KCl(s) + 3O2(g) calculate how many grams of oxygen form when 83.6 kg KClO3 completely reacts. Express your answers, separated by commas, in grams to three significant figures. B. For the reaction 2KClO3(s) ? 2KCl(s) + 3O2(g)calculate how many grams of oxygen form when 22.5 mg KClO3 completely reacts. Express your answers, separated by commas, in grams to three significant figures. A. What is the molar mass of butane, C4H10? Express your answer to...
QUESTION 19 What is the mass percent of sodium, Na, in Na2O7 Report your answer to...
QUESTION 19 What is the mass percent of sodium, Na, in Na2O7 Report your answer to two significant figures and do not include units (the units would be %) Be sure to show your work on paper and submit it at the end of the exam so partial credit can be determined. NOTE: If you need to enter an answer in scientific notation, 6.02x1023 would be entered as 6.02E23 QUESTION 20 What is the mass in grams of a single...
Calculate the mass of water produced when 7.44 g of butane reacts with excess oxygen. Express...
Calculate the mass of water produced when 7.44 g of butane reacts with excess oxygen. Express your answer to three significant figures and include the appropriate units. View Available Hint(s) 0.64 Units Submit Previous Answers * Incorrect; Try Again Enter your answer using units of mass. Part Review Constants Periodic Table Calculate the mass of butane needed to produce 61.3 g of carbon dioxide. Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s)...
QUESTION 26 What volume of scandium, in milliliters, will have a mass of 31.2 grams? The...
QUESTION 26 What volume of scandium, in milliliters, will have a mass of 31.2 grams? The density of Scandium is 2.985 g/mL Report your answer in milliliters to three significant figures and do not include units. RE QUESTION 27 How many molecules of CH4 are in 39.2 grams of CH4? Report your number of molecules to two significant figures and do not include units NO QUESTION 28 6 + + Determine the theoretical yield of Fe2O3, in grams, if 20.4...
24/30 25. What is the mass in grams of 0.450 moles of magnesium sulfate, MgSO4? grams...
24/30 25. What is the mass in grams of 0.450 moles of magnesium sulfate, MgSO4? grams Send a chat Your answer should be rounded to three significant figures. Do not include units in your answer. O
What is the total mass of oxygen contained in 8.20 g of benzoic acid (C6H3COOH Enter...
What is the total mass of oxygen contained in 8.20 g of benzoic acid (C6H3COOH Enter the correct numerical value with the appropriate number of significant figures. Express scientific notation like 4.29E-15
Calculate the mass of water produced when 1.96g of butane reacts with excess oxygen. Express your...
Calculate the mass of water produced when 1.96g of butane reacts with excess oxygen. Express your answer to three significant figures and include the appropriate units.
QUESTION 19 What is the mass percent of sodium, Na, in Na2O7 Report your answer to two significant figures and do not include units (the units would be %) Be sure to show your work on paper and submit it at the end of the exam so partial credit can be determined. NOTE: If you need to enter an answer in scientific notation, 6.02x1023 would be entered as 6.02E23 QUESTION 20 What is the mass in grams of a single...
Calculate the mass of water produced when 7.44 g of butane reacts with excess oxygen. Express your answer to three significant figures and include the appropriate units. View Available Hint(s) 0.64 Units Submit Previous Answers * Incorrect; Try Again Enter your answer using units of mass. Part Review Constants Periodic Table Calculate the mass of butane needed to produce 61.3 g of carbon dioxide. Express your answer to three significant figures and include the appropriate units. ► View Available Hint(s)...
QUESTION 26 What volume of scandium, in milliliters, will have a mass of 31.2 grams? The density of Scandium is 2.985 g/mL Report your answer in milliliters to three significant figures and do not include units. RE QUESTION 27 How many molecules of CH4 are in 39.2 grams of CH4? Report your number of molecules to two significant figures and do not include units NO QUESTION 28 6 + + Determine the theoretical yield of Fe2O3, in grams, if 20.4...
24/30 25. What is the mass in grams of 0.450 moles of magnesium sulfate, MgSO4? grams Send a chat Your answer should be rounded to three significant figures. Do not include units in your answer. O
What is the total mass of oxygen contained in 8.20 g of benzoic acid (C6H3COOH Enter the correct numerical value with the appropriate number of significant figures. Express scientific notation like 4.29E-15
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