Seoyeon needs to determine the formula of an unknown hydrate (AB-XH2O). Given the following data: mass of empty crucible mass of ABXH2O + crucible mass of AB + crucible 16.5245 g 26.9416 g 21.6515 g Which of the following is the correct formula of the hydrate? (The molar mass of AB is 120.37 g mol-1) A) AB-7H2O B) AB-H20 C) AB-5H2O D) AB-3H2O

Seoyeon needs to determine the formula of an unknown hydrate (AB-XH2O). Given the following data: mass of empty crucible mass of ABXH2O + crucible mass of AB + crucible 16.5245 g 26.9416 g 21.6515 g Which of the following is the correct formula of the hydrate? (The molar mass of AB is 120.37 g mol-1) A) AB-7H2O B) AB-H20 C) AB-5H2O D) AB-3H2O

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Jessica is doing her pre-lab homework for Chemistry. She is asked to predict how many grams of oxygen gas are produced if 40.0g of potassium chlorate is decomposed according to this balanced chemical equation shown. 2KCIO3(s)→2KCI(s)+302(g) She performs the following calculation, and gets 15.7 g of O2 as her answer. 8 Kclo, mol KCIO, moi 0, 8 O2 1 mol KC1O, 122.55 g KCIO, 3 mol 02 32.00 g 02 1 mol 02 2 mol KC1O, The next day when her group performs the experiment they obtain an actual yield of 14.9 grams of oxygen gas. What is the percent yield for the experiment? report your answer to the tenths place, i.e. one decimal place.
Herbimycin is an herbicide with the chemical formula C30H42N2O9. Answer the questions below concerning samples of Herbimycin.[Note: Very large numbers requiring scientific notation can be entered as they appears on your calculator screen. 1.25×1022 would be entered as 1.25E23.]• How many moles of Herbimycin are present in 30.00 grams of Herbimycin? • How many molecules of Herbimycin are present in 30.00 grams of Herbimycin? • How many atoms of hydrogen are present in 0.0800 moles of Herbimycin? • How many moles of oxygen are present in 10.00 grams of Herbimycin?
A student synthesizes tin oxide to create a compound with generic formula SnxOy. She does this by combining 30.80 g of tin and when the tin oxide product is produced, the total mass of the product is 39.10 g. Given that oxygen has a molar mass 15.999 g⋅mole-1, the number of moles of oxygen in the product is A) 0.51888 B) 132.81
The reaction between potassium chlorate and red phosphorus takes place when you strike a match on a matchbox. If you were to react 72.5g of potassium chlorate (KCIO3) with excess red phosphorus KCIO3 + P4= P4 + KCI what mass is tetraphosphorus decaoxide(P4O10) could be produced? how may grams of potassium chloride (K-CI) could be produced
Menthol is composed of C,H, and O. A 0.1005g sample of menthol is combusted, producing 0.2829g of CO2 and 0.1159g of H20. What is the empirical formula for menthol? If menthol has a molar mass of 156g/mol, what is its molecular formula?
2 NH3 + 3 CuO --> 3 Cu + N₂ + 3H₂O In the above equation how many moles of N₂ can be made when 170.6 grams of CuO are consumed? Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer as 4.0 Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.: Element Molar Mass Hydrogen 1 Nitrogen 14 Copper 63.5 Oxygen 16
Consider following reaction below in photo, using the limiting reactant concept find moles of hydrogen and… (all information in photo)
Give typed explanation
A chemist carries out this reaction, starting with 30.5 g of C6H6 and an excess Br2: C6H6(l) + Br2 (l) --> C6H5Br (g) + HBr (g) What is the theoretical yield of C6H5Br for this reaction?
Jessica is doing her pre-lab homework for Chemistry. She is asked to predict how many grams of oxygen gas are produced if 40.0 g of potassium chlorate is decomposed according to this balanced chemical equation shown. 2KCIO3(s)-2KCI(s)+302(g) She performs the following calculation, and gets 15.7 g of 02 as her answer. E KCIO, mol KCIO, mol 0, 32.00 g 02 1 mol KC1O3 122.55 g KCI03 3 mol 02 2 mol KCIO, 1 mol 0 The next day when her group performs the experiment they obtain an actual yield of 14.5 grams of oxygen gas. What is the percent yield for the experiment? report your answer to the tenths place, i.e. one decimal place.
Ammonia reacts with O₂ to form either NO(g) or NO₂(g) according to the following UNBALANCED equations: NH₃(g) + O₂(g) → NO(g) + H₂O(g) NH₃(g) + O₂(g) → NO₂(g) + H₂O(g) In one experiment 6.00 moles of NH₃(g) and 15.00 moles of O₂(g) were placed in a closed flask and allowed to react. After the reaction was complete, 5.95 moles of O₂(g) remained and all of the NH₃(g) had reacted. Calculate the number of moles of NO(g) formed in the reaction mixture.