A chemist prepares a mixture of hexane and toluene at a temperature of 21.0 °C. He measures out 314. mL of hexane and mixes it with 0.74 L of toluene. He measures the volume of the solution after it is well mixed and finds that it is 1.03 L. The density of hexane is 0.66 g/mL and the density of toluene is 0.87 g/mL. Calculate the volume percent of hexane in this solution. Be sure your answer has the right number of significant digits. ?
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- ALEKS 65°F Sunny O STATES OF MATTER Calculating mass percent composition ✰ www-awa.aleks.com/alekscgi/x/lsl.exe/1o_u-lgNslkr7j8P3jH-IQgHIvdL2donGg9plnQUm9kiGJhghYuAiZLq5VA34Jc4anaqz7Yt3AJbDyN067TYtJjWJK3y3... component X A ALEKS - Nancy Duran - Learn X A chemist mixes 82. g of benzene with 89. g of isopropenylbenzene and 61. g of acetone. Calculate the percent by mass of each component of this solution. Round each of your answers to 2 significant digits. benzene isopropenylbenzene acetone Explanation Check mass percent 0 % % % Search New Tab x10 + X 0/5 T ENG ■ N : Nancy olo Ar IM © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility 9:09 PM 4/19/2023 X (27H ← OneLogin C ||| = O CHEMICAL REACTIONS Calculating and using the molar mass of elements mol Explanation D21 ALEKS Homework- CHM1045 GE X www-awa.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-IBcn9hvCfbYq_fi3Zsn8H20W_5PTMI0acVC-U A chemist weighed out 6.64 g of gold. Calculate the number of moles of gold she weighed out. Round your answer to 3 significant digits. At Check P A ALEKS-Xzavian Patrick - Learn X S X + Ⓒ2022 McGraw Hill LLA www-awn.aleks.com/alekscgi/x/lsl.exe/1o_u-IgNslkr7j8P3jH-lijkPWvZoZLqKt1FLlq7wcPWKzBYGfE9IMFjeRdLZdKJGrDhJvdXUd_ O STOICHIOMETRY Using the Avogadro Number An aluminum atom has a mass of 4.48 × 10 -23 g and a small airplane has a mass of 5000. kg. Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of aluminum atoms? Round your answer to 3 significant digits. How many moles of aluminum atoms have a mass equal to the mass of a small airplane? Round your answer to 3 significant digits.
- M|OM|O G fil app.101edu.co Maps ouTube F1 80 F3 E D C $ 4 c|o X G d Question 23 of 31 The molecules shown below are Aa F4 R F P₂ % 5 V A F5 T G В B 8 6 MacBook Air F6 B Y H 7 F7 с N 2|GT|G B * 8 J 기 A) Identical molecules B) Stereoisomers C) Constitutional isomers D) Isotopes E) Neither identical nor a type of isomer Done F8 B M W ( 9 G 17 CS UO N E E K F9 O H L F10 U P B > F11 Gra الہا + 11 ☐ ? X command option F13 1HO || C-CH₂-CH₂-C + 2 CH3CH₂OH ОН 0 Draw the molecule(s) on the canvas by choosing buttons from the Tools (for bonds), Atoms, L+ 12D H* יII I www-awn.aleks.com/alekscgi/x/lsl.exe/1o_u-IgNslkr7j8P3jH-lijkPWvZoZLqKt1FLIq7wcPWKzBYGfE9IMFjeRdLZdKJGrDhJ O STOICHIOMETRY Using the Avogadro Number An oxygen atom has a mass of 2.66 x 10 - 23 g and a glass of water has a mass of 0.050 kg. Use this information to answer the questions below. Be sure your answers have the correct number of significant digits. What is the mass of 1 mole of oxygen atoms? x10 g Round your answer to 3 significant digits. How many moles of oxygen atoms have a mass equal to the mass of a glass of water? Round your answer to 2 significant digits.
- A 0.4994 g sample of a hydrate of CuS04 xH20, is heated to a constant weight of 0.3184g(total loss of water). Calculate the value of x.||| A ALEKS-Katelyn Pearson... 1 Apromatincat Rom Fecr] ATOMS, IONS AND MOLECULES Predicting the formula of ionic compounds with common... Write the empirical formula for at least four ionic compounds that could be formed from the following ions: OH, Fe²+, 103, NH b Answered. The following X O GJ= M = i 0: = 1. NaBH4 2. dilute H* N 1. K 2. L 1.03 2. S(CH3)2 K= H3CO H3CO. M N = P = 1. NaNH2 2. Br CI L= O P 1. CN- 2. Na (s), NH3 (1), cold
- A formula for compounding state qs ad 250 ml. This expression meansRIAS X * OWLV2 | On X 2 Molecular P Pearson SI X metals peri x A My Home takeCovalentActivity.do?locator%=assignment-take (Review Topics) (References] Use the References to access Important values if needed for this question. a. How many moles of sulfur hexafluoride are present in 2.40 x 1022 molecules of this compound? moles b. How many molecules of sulfur hexafluoride are present in 3.52 moles of this compound? molecules Submit Answer Retry Entire Group 9 more group attempts remaining Show Hint Previous Next 回ヨ *oH OH Reagants s neecled ,