1.75 x 1025 selenium atoms contains ____ moles of selenium. Report your answer to 3 s.f. (hint: this is a dimensional analysis problem) _________
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1.75 x 1025 selenium atoms contains ____ moles of selenium. Report your answer to 3 s.f.
(hint: this is a dimensional analysis problem)
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- Cyclopropane mixed in the proper ratio with oxygen can be used as an anesthetic. At 755 mm Hg and 25C, it has a density of 1.71 g/L. (a) What is the molar mass of cyclopropane? (b) Cyclopropane is made up of 85.7% C and 14.3% H. What is the molecular formula of cyclopropane?HUAWEI Y7P AI 48MP TRIPLE CAMERA Chromium metal is obtained by heating chromium(lI) oxide with carbon. Calculate the mass percent of chromium in the oxide, and then use this %-value to calculate the quantity of chromium(III) oxide (in gram and in kilogram) required to produce 850 kg of chromium metal. Antwoord: | Answer:sity o... Fingsbo... ckboard... EARED4 Method? 7... 9 2 W 6 9 QUESTION 5 One mole of copper(II) sulfate, CuSO4, contains 2.41 x 1023 2.41 x 1024 6.02 x 1023 1.51 x 1023 4 Click Save and Submit to save and submit. Click Save All Answers to save all answers. 3 16 MAF 1 23 H R T moles of O. tv Y 8 Save All Answers 8 0.22 S
- Calculate the ratio between the moles of magnesium used and the moles of oxygen used. Express this ratio in simplest whole-number form. Mass of oxygen = 0.49g- 0.33g= 0.16gNumber of moles = given mass / molar massNumber of moles of oxygen = 0.16/ 16 = 0.01 molMolarmass of magnesium = 24.3gMoles of magnesium = 0.33g / 24.3g = 0.0135 molMoles of magnesium 0.0135 1.35 3 4------------------------ = _____________ = ____________ x ________ = ___Moles of oxygen 0.01 1 3 3 The ratio between the moles of magnesium used and the moles of oxygen uses is 4/3. Based on your experimental data, write the empirical formula for magnesium oxide. Is this the molecular formula or the simplest formula? Explain how you know this.Answers accurate to 3 or 4 significant figures & show your work. 6. A 18.00-g sample of a mixture containing only FESO4.7H2O and SnCl4.5H2O was heated carefully to drive off the H2O (g) from the two hydrates. The remaining residue containing FeSO4 and SnCl4 weighed 11.75 grams. Show how you determine the percentage composition by mass of the two hydrates in the original mixture. You must show your work!stoly - U.S._Hist. HOi Chem101: Transform . A Tempo-Markings-BP.. » Oth Question 8 of 16 What is the mass in grams of NO that will be produced from 17.9 g of NO2 reacted with excess water in the following chemical reaction? 3 NO2(g) + H2o(1) → 2 HNO:(g) + NO(g) g 1 4 C 7. 8 9. +/- X 100 1234 AM 3/14/2021 P Type here to search 8 5
- ortin X TETAAZEN ce/acellus_engine.html?ClassID=177151 tions + Use the data below to determine the mass ratio of iron to oxygen for compound 1. Et Compound 1 2 nternational Academy of Science. All Rights Reserved. Mass Fe (grams) 15.55 20.98 [P]:1 Enter the answer that belongs in the green box. Iron Ratio Cmpd 1 Mass O (grams) 4.45 9.02 * C Enter9. When 2.43 g of magnesium was heated with oxygen to produce 4.03 g of magnesium oxide. a.) Calculate the mass of oxygen in grams. 4,03 = C664X1024 Gorex1023 G.02x10 b.) Calculate the number of moles of oxygen. c.) Calculate the number of moles of magnesium. 50 LABORATORY 5 | THE MOLE RATIO OF MAGNESIUM OXIDE: PRE-LABA chemist adds 0.30 L of a 1.7M nickel(II) chloride (NiCl,) solution to a reaction flask. Calculate the mass in grams of nickel(II) chloride the chemist has added to the flask. Round your answer to 2 significant digits. x10 Submit Assignr Continue 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center Accessi IMG-6097.jpg IMG-6096.jpg IMG-6095.jpg IMG-6099.jpg IMG-6098.jpg MacBook Air 80 F10 F11 F7 F8 F9 F5 F6 F3 F4 F1 $ % & 3 4 5 6 7 8 * 00
- G.326.10. CHALLENGE. You have two distinct gaseous compounds made from element X and element Y. The mass percents are as follows: Compound I: 30.43% X, 69.57% Y Compound II: 63.64% X, 36.36% Y In their natural standard states, element X and element Y exist as gases. (Monatomic? Diatomic? Triatomic? That is for you to determine.) When you react "gas X" with "gas Y" to make the products, you get the following data (all at standard pressure and temperature): 1 volume "gas X" + 2 volumes "gas Y" → 2 volumes compound I 2 volumes "gas X" + 1 volume "gas Y" → 2 volumes compound II Assume the simplest possible formulas for reactants and products in the chemical equations above. Then, determine the relative atomic masses of element X and element Y and suggest identities.Stoichiometric coefficients are used to describe the mole ratio. "F Mostly sunny F1 ! O Q A 1 N True F2 @ 2 W S F3 Alt -Ő+ X #M 3 E F4 D $ 4 C F5 R F % 5 V F6 T ☆ G F7 A 6 a Y B F8 & 7 H U N F9 ★ 8 J - F10 M ( 9 K F11 O < False 3 ) 0 L Alt F12 P E A C
