.ec_cart_button_row > .ec_cart_button, .ec_cart_button_row input[type="button"], .ec_cart_button_row a{ background-color:#222222 !important; } #ec_current_media_size{ max-width:1300px; } Verifying Avogadro's Hypothesis Video from HC Communications on YouTube. (a) Name the elements of the intrinsic conduction system of the heart in order, beginning with the pacemaker. .ec_product_li:nth-child( 2n+1 ) .ec_product_editor{ left:227px; } .ec_store_table a{ color:#222222 !important; } blockquote.testimonial p, C. 100 cm3 of 1.0 mol dm-3 NaOH A Calculate the molecular mass of the compound in grams from its molecular formula (if covalent) or empirical formula (if ionic). .ec_details_customer_reviews_left > h3{ color:#222222 !important; } How many hydrogen atoms are there in one mole of CH2Cl2? View the full answer. Many familiar items are sold in numerical quantities that have unusual names. Figure 1.7.2 is a flowchart for converting between mass; the number of moles; and the number of atoms, molecules, or formula units. This is the mass of calcium phosphate that contains 6.022 1023 formula units. Atomic hydrogen constitutes about 75% of the baryonic mass of the universe.. B The formula mass of Ca(ClO)2 is obtained as follows: The molar mass of Ca(ClO)2 is 142.983 g/mol, \( moles\; Ca\left ( ClO \right )_{2}\left [ \dfrac{molar\; mass\; Ca\left ( ClO \right )_{2}}{1\; mol\; Ca\left ( ClO \right )_{2}} \right ]=mass\; Ca\left ( ClO \right )_{2} \), \( 1.75\; mol\; Ca\left ( ClO \right )_{2}\left [ \dfrac{142.983\; g Ca\left ( ClO \right )_{2}}{1\; mol\; Ca\left ( ClO \right )_{2}} \right ]=250.\; g\; Ca\left ( ClO \right )_{2} \). They called this number Avogadros Number (N A) in honour of Amadeo Avogadro, and the number is 6.02 x 1023 which is equal to one mole of any atoms, ions or molecules. jQuery(document).ready(function(jQuery){jQuery.datepicker.setDefaults({"closeText":"Close","currentText":"Today","monthNames":["January","February","March","April","May","June","July","August","September","October","November","December"],"monthNamesShort":["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"],"nextText":"Next","prevText":"Previous","dayNames":["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"],"dayNamesShort":["Sun","Mon","Tue","Wed","Thu","Fri","Sat"],"dayNamesMin":["S","M","T","W","T","F","S"],"dateFormat":"MM d, yy","firstDay":1,"isRTL":false});}); (b) What is the important function of this conduction system? Hydrogen is a diatomic molecule; it travels #ec_current_media_size{ max-width:1139px; } .ec_product_type1 .ec_product_addtocart:hover{ background-color:#666666; border-bottom-color:#222222; } = 2H2O because oxygen is diatomic like hydrogen. So it is: $$8.66 \cdot 6.02 \cdot 10^{23} = 5.21332 \cdot 10^{24}$$ } /* I wish I had taken this years ago! For example, the equation above would be read as: 1 mole of propane (CH 3 CH 2 CH 3) reacts with 5 moles of oxygen (O 2) to produce 3 moles of carbon dioxide (CO 2) and 4 moles of water (H 2 O) and heat is released. Which has the greatest number of hydrogen atoms? " This course not only assists in day to day practices but everyday life. atoms C. 2) Consider samples of phosphine (PH 3), water (H 2 O), hydrogen sulfide (H 2 S), and hydrogen fluoride (HF), each with a mass of 105 g. Rank the compounds from least to the greatest number of hydrogen atoms moles How many grams of Sodium Sulfate (Na 2 SO 4) are present in a sample containing 0.176 moles ? .ec_details_right > form > .ec_details_breadcrumbs.ec_small, .ec_details_right > form > .ec_details_title, .ec_details_right > form > .ec_title_divider, .ec_details_right > form > .ec_details_price, .ec_details_right > form > .ec_details_rating{ display:none; } Explanation: First, the correct chemical formula of isopropyl alcohol is C3H 7OH and not C3H 7O. Cyanocobalamin is vitamin B-12, and its outrageous formula is C63H88CoN14O14P. For example, in the methane molecule one carbon is connected to four hydrogen atoms simultaneously, while each hydrogen atom is connected to only one carbon. " As a sales seminar, it exceeded most of the previous sales seminars I have attended. ", " One of the best Ive been to, if not the best! ", .ec_details_customer_reviews_row > input[type="button"]:hover{ background-color:#333333; } .ec_details_magbox{ display:none !important } The given number of carbon atoms was greater than Avogadro's number, so the number of moles of \(\ce{C}\) atoms is greater than 1 mole. .ec_category_li:nth-child( 1n+1 ){ clear:both; } The mole is a unit used to measure the number of atoms, molecules, or (in the case of ionic compounds) formula units in a given mass of a substance. Dichloromethane Melting Point. .ec_categorywidget a:hover, .ec_manufacturer_widget a:hover, .ec_pricepoint_widget a:hover, .ec_group_widget a:hover, .ec_cartwidget a:hover{ color:#666666 !important; } 1 : 2 C. 1 : 6 D. 6 : 1 (Total 1 mark) 13. 1 grams CH2Cl2 is equal to 0.011774044777634 mole. How many hydrogen atoms are contained in one mole of ethanol, C2H5OH? Calculate the molecular mass or formula mass of each compound. " Norm is high energy and keeps you involved. ", III. .ec_product_quickview_content_quantity .ec_minus:hover, .ec_product_quickview_content_quantity .ec_plus:hover{ background-color:#666666; } (For more information, see Section 1.6 ) Similarly, the molar mass of uranium is 238.03 g/mol, and the molar mass of iodine is 126.90 g/mol. 1 g of CH2Cl2 .ec_cart_input_row > a, .ec_cart_input_row > b, .ec_cart_input_row > strong, .ec_account_order_details_item_display_title > a{ color:#222222; } Molar mass of CH2Cl2 - WebQC To understand the Lewis structure lets first calculate the total number of valence electrons for Dichloromethane. The negative charge of the electron is balanced by the positive charge of one proton in the hydrogen nucleus. There are two moles of hydrogen atoms and one mole of oxygen atoms in one mole of water. Just as 1 mol of atoms contains 6.022 1023 atoms, 1 mol of eggs contains 6.022 1023 eggs. That being said, C3H 7OH represents one molecule of isopropyl alcohol, which has 8 Hydrogen atoms. #ec_cart_payment_hide_column{ display:none; } . #ec_cart_payment_one_column{ display:block; } dd, .ec_cart_right{ width:100%; padding-left:0px; } units" of that stuff. How many hydrogen atoms are contained in one mole of ethanol, C2H5OH? There are 4 Hydrogen atoms in one molecule of methane, or 2 Hydrogen molecules. } Which compound has the empirical formula with the greatest mass? To analyze the transformations that occur between individual atoms or molecules in a chemical reaction it is therefore absolutely essential for chemists to know how many atoms or molecules are contained in a measurable quantity in the laboratorya given mass of sample. The structure of a molecule of Freon-11 is as follows: Atomic mass, and molecular mass have the same units: atomic mass units. 1.204 x 1024 atoms of hydrogen. Find (a) the car's speed, (b) the change in its velocity during the turn, and (c) its average acceleration during the turn. " The 7 steps was a great insight in dealing with clients. ", For example, cans of soda come in a six-pack, eggs are sold by the dozen (12), and pencils often come in a gross (12 dozen, or 144). A. .ec_image_container_none, .ec_image_container_none > div, .ec_image_container_border, .ec_image_container_border > div, .ec_image_container_shadow, .ec_image_container_shadow > div{ min-height:310px; height:310px; } Calculate the mass of 0.0122 mol of each compound. 5.35 1020. To avoid toomuch space, write your answer in scientific notation. Follow along and record the measurements to get the relative masses. The first conversion factor converts from moles of particles to the number of particles. common chemical compounds. The same calculation can also be done in a tabular format, which is especially helpful for more complex molecules: Calculate the molecular mass of trichlorofluoromethane, also known as Freon-11, whose condensed structural formula is CCl3F. Total number of H atoms is) = (2 number of H2 molecules) = 2 30.1 10^23 = 6.02 10^24 ( atoms of hydrogen) generally true of all gases except the inert gases. .ec_cart_button_row > .ec_account_button{ background-color:#222222 !important; } Doom Emacs Irc, 1 : 2 C. 1 : 6 D. 6 : 1. generally true of all gases except the inert gases. #ec_current_media_size{ max-width:989px; } What amount of oxygen, O2, (in moles) contains 1.81022 molecules? Extending this into moles, for each mole of the compound, you'll have 2 mols of carbon, 6 mols hydrogen and 1 mol oxygen. 1 mole of H2 = 6.02 10^23 molecules 5 mole of H2 = 5 6.02 10^23 molecules Number of molecules = 30.1 10^23 Notice:) One H2 molecule = 2 H atoms (asked in Que.) .tags, 6 C. 1.01023 D. 3.61024 (Total 1 mark) 12. When we talk about CH2Cl2, Carbon is less electronegative than Chlorine atoms. How about in a dozen? Construct a flowchart to show how you would calculate the number of moles of silicon in a 37.0 g sample of orthoclase (KAlSi3O8), a mineral used in the manufacture of porcelain. In this case, the mass given (35.00 g) is less than the molar mass, so the answer should be less than 1 mol. When we deal with elements such as iodine and sulfur, which occur as a diatomic molecule (I2) and a polyatomic molecule (S8), respectively, molar mass usually refers to the mass of 1 mol of atoms of the elementin this case I and S, not to the mass of 1 mol of molecules of the element (I2 and S8). Legal. " Being an outside sales rep -- will use the principles on an everyday basis. ", document.getElementById('quoterotator').innerHTML="No Quotes Found"; C Adding together the masses gives the molecular mass: 24.022 amu + 6.0474 amu + 15.9994 amu = 46.069 amu, Alternatively, we could have used unit conversions to reach the result in one step, as described in Essential Skills 2, \( \left [ 2\; atoms\: \; \left ( \dfrac{12.011\; amu}{1\, \; atom\; C} \right ) \right ] +\) \( \left [ 6\; atoms\: H\; \left ( \dfrac{1.0079\; amu}{1\, \; atom\; H} \right ) \right ]+\) \( \left [ 1\; atoms\: O\; \left ( \dfrac{15.9994\; amu}{1\, \; atom\; O} \right ) \right ] \). Describe the relationship between an atomic mass unit and a gram. CLASS NOTES - Vanderbilt University (That's If you have 1.81024 atoms of carbon, how many moles of carbon do you have? If the molar mass of the compound is 132.1 g/mol, what is the molecular formula? .ec_details_stock_total{ color:#666666 !important; } .ec_product_quickview_content_title:hover, .ec_product_quickview_content_title > a:hover{ color:#666666 !important; } (, Which sample has the least number of atoms? .rss-date, A sample of a hydrocarbon (a compound consisting of only carbon and hydrogen) contains 2.59 1023 atoms of hydrogen and is 17.3% hydrogen by mass. What is its empirical formula? box-shadow: none !important; This is because the oxygen atom, in addition to forming bonds with the hydrogen atoms, also carries two pairs of unshared electrons. ~2.4e24 hydrogen atoms. " Thank you for taking the time to develop a course that will improve the quality of my life. ", Now the mass of hydrogen = 1 gram mass of chlorine = 35.5 grams Therefore, molar mass of CH2Cl2 = 12 + 2 (1) + 2 (35.5) = 85 grams number of moles = mass / molar mass number of moles of CH2Cl2 = 66.05 / 85 = 0.777 moles One mole of CH2Cl2 contains two moles of Cl and each chlorine mole has Avogadro's number of atoms in it. .ec_product_type1 .ec_product_addtocart{ background-color:#222222; border-bottom-color:#666666; } .ec_product_details_star_off:before{ border-bottom-color:#CCCCCC; } C. 3.0 dm3 How many atoms are in one mole of hydrogen? 5.30x1025 hydrogen atoms. Is the problem giving you a starting number of moles for the compound? Ge Microwave Door Button Broken, .ec_product_li, li.ec_product_li{ width:50%; } The molar mass of a substance is defined as the mass of 1 mol of that substance, expressed in grams per mole, and is equal to the mass of 6.022 1023 atoms, molecules, or formula units of that substance. Taught with enthusiasm. .ec_category_li{ width:50%; } It was engaging and I think more people should do it. ", Convert grams C6H6 to moles or moles C6H6 to grams Molecular weight calculation: 12.0107*6 + 1.00794*6 Percent composition by element Calculate the molecular weight of a chemical compound Enter a chemical formula: C. 50.0 cm3 .ec_details_images, .ec_details_right, .ec_details_customer_reviews_left, .ec_details_customer_reviews_form, .ec_details_customer_review_date{ float:left; margin-left:0px; width:100%; } .ec_product_li:nth-child( 1n+1 ){ clear:both; } " Gave a lot of insight on things we dont really think about improving and should. ", Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. How many atoms of hydrogen are in 1.0 mole of cyanocobalamin? These relative weights computed from the chemical equation are sometimes called equation weights. .ec_product_page_sort > .ec_product_page_showing{ margin:0; } Clearly something clever is needed but first let us briefly review how to calculated molecular masses. Hydrogen atom - Wikipedia I will apply it everyday in my personal and work life. ", .ec_out_of_stock_notify_title, .ec_out_of_stock_notify_button > input{ background-color:#222222; } $('#widget-tabs').css('display', 'none'); C. 5 One mole is equal to 6.022 x 1023. Find moles atoms & grams of an element in a compound 0.0884mol C4H10 C: (4) x 0.0884 = 0.3536 H: (10) x 0.0884 = 0.884 . 1 g of CH3Cl C. 1 g of CHCl3 B. .ec_cart_right{ width:100%; padding-left:0px; } .ec_product_type1 .ec_product_quickview > input:hover{ background:#222222; background-color:#222222; } This is not much help in the laboratory for the typical chemist who only has a balance to weight out chemicals but needs to know how the number of atoms or molecules. ], #ec_current_media_size{ max-width:1300px; } .ec_product_li:nth-child( 2n+1 ){ clear:both; } 1 : 2 C. 1 : 6 D. 6 : 1 B CH3CH(OH)CH3 var tr_would_you_like_to_opt_out = "Would you like to opt out from selling your personal informaion for the purpose of ads personalization? The best sales training I have been provided. ", The H2 in H2O is not 2 hydrogens bonded to one another and then to oxygen, but two separate hydrogen atoms, each bonded an oxygen atom. Ge Microwave Door Button Broken. .ec_details_price > .ec_product_sale_price{ color:#000000; } The molecular formula of dichloromethane is CH2Cl2, indicating that it contains one carbon atom, two hydrogen atoms, and two chlorine atoms. The car does not alter its speed during the turn. } Taco 218 Repair, If you think about it this way, for each molecule of the compound, you have 2 carbons, 6 hydrogen, 1 oxygen. bonding relationships to one another, in covalent compounds. .ec_product_star_on:before{ border-bottom-color:#222222; } Using the concept of the mole, we can now restate Daltons theory: 1 mol of a compound is formed by combining elements in amounts whose mole ratios are small whole numbers. } .ec_product_details_star_off{ border-bottom-color:#CCCCCC !important; color:#CCCCCC; } When the equation is balanced using the smallest possible integers, what is the coefficient .ec_product_star_off:before{ border-bottom-color:#CCCCCC; } Therefore, in a mole of methane molecules, there are 2.4088 x 6 D. 3.61024 Which of the following contains the greatest number of molecules? II. Not Sure About the Answer? .ec_account_dashboard_row_divider a:hover, .ec_account_order_line_column5 a:hover, .ec_account_complete_payment_button:hover{ background:#666666 !important; background-color:#666666 !important; } 1 mol of H2SO4 .ec_price_container_type5{ background-color:#222222; } {color:#a8a8a8;}.breadcrumb A sample of propane, C3H8C3H8, contains 10.3 molesmoles of carbon atoms. It can also be defined as two or more atoms connected by a chemical bonds. .ec_product_li:nth-child( 2n+1 ) .ec_product_editor{ left:227px; } How many hydrogen atoms are contained in one mole of ethanol, C2H5OH? " I feel like my motivation to do the best I can has been re-established. ", B Convert from mass to moles by dividing the mass given by the compounds molar mass. The definition of a molethat is, the decision to base it on 12 g of carbon-12is arbitrary but one arrived at after some discussion between chemists and physicists debating about whether to use naturally occurring carbon, a mixture of C-12 and C-13, or hydrogen. Why do you need to know the formula for a molecule in order to calculate the number of moles of one of the atoms. Trick question. .ec_product_li, li.ec_product_li{ width:100%; } Even with a good word-processing program, having to click on an icon to get a superscript and then remembering to click off after you type the number can be a real hassle. What is the molarity of sodium ions in a solution prepared by diluting 250. mL of 0.550 M Na2SO4 to 1.25 L? Molecular weight of C6H6 - Convert Units The quantity of a substance that contains the same number of units (e.g., atoms or molecules) as the number of carbon atoms in exactly 12 g of isotopically pure carbon-12., from the Latin moles, meaning pile or heap (not from the small subterranean animal!). Any chemical element. .ec_details_images{ width:47%; } How many atoms are present in one molecule of hydrogen? .ec_product_type6 .ec_product_meta_type6 .ec_price_container:after{ border-color:#666666 transparent transparent #666666; } Chemistry is the study of how atoms and molecules interact with each other which occurs on the atomic scale. .ec_product_type6 .ec_product_meta_type6 .ec_product_addtocart{ background-color:#222222 !important; } .ec_category_li:nth-child( 1n+1 ) .ec_product_editor{ left:227px; } One mole is equal to 6.022 x 1023. Hydrogen is a diatomic molecule; it travels around with a buddy as H2 and not as a single atom. This problem has been solved! .ec_product_type3 .ec_product_addtocart:hover{ background-color:#666666 !important; } which contains the largest number units" of that stuff. display: inline !important; Avogadro's number.) .ec_category_li:nth-child( 1n+1 ){ clear:both; } A. .ec_category_li{ width:100%; } Metal Framing Jobs Near Me, We do not have H2 + O = H2O. How about in a dozen? .ec_product_added_to_cart a:hover, .ec_cart_checkout_link:hover{ color:#666666 !important; } .ec_details_customer_reviews_form > .ec_details_customer_reviews_form_holder > h3{ color:#222222 !important; } =2.4088 x 10^24 atoms of H. Advertisement. The concept of the mole allows us to count a specific number of individual atoms and molecules by weighing measurable quantities of elements and compounds. Atoms are so small, however, that even 500 atoms are too small to see or measure by most common techniques. On the molar level, they are interpreted in terms of moles. border: none !important; 1 : 1 B. If we did not know aboutmolesand just knew about numbers of atoms or molecules (those big numbers that require lots of superscripts), life would be much more complicated and we would make many more typing errors. Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. " This course has given me the knowledge to achieve and make a great difference in my goal to become a successful salesman for my company! ", Now the There are \(2 \times 2 = 4\) hydrogen atoms. " A great guide to sales but also a great guide to how to live your life. Given the molecules propane (C3H8) and n . .ec_details_tab.ec_active{ border-top-color:#222222; } .ec_product_li, li.ec_product_li{ width:50%; } This page titled 10.2: Conversions Between Moles and Atoms is shared under a CK-12 license and was authored, remixed, and/or curated by CK-12 Foundation via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request. Molecular weight of CH2Cl2 - Convert Units Password must contain at least one uppercase letter, a number and a special character. .ec_cart_button_row > .ec_account_button:hover{ background-color:#666666 !important; } .ec_quickview_view_details a:hover{ color:#666666 !important; } CH3CH2CH2OH 92% (402 ratings) Problem Details. 1) Number of mole of H2=2.5 moles Numbers of molecules=moleavogadro numbers =2.56.0221023 . how many hydrogen atoms are in one mole of ch2cl2 Is the singer Avant and R Kelly brothers? CH2Cl2 - Dichloromethane, 75-09-2 - Kemicalinfo It is a colorless gas at standard temperature and pressure. " Best training course in 10 years of banking. ", The expression 2H, on the other hand, indicates two separate hydrogen atoms that are not combined as a unit. In that case, a dozen is 12;so \(12 \times 2 = 24\) hydrogen atoms in a dozen water molecules. .ec_show_two_column_only{ display:none !important; } I highly recommend Norm\'s classes to those who are committed to earning higher sales numbers. ", Now number of moles of #CH_4# in #5.2 xx10^24# molecules is #=(5.2 xx10^24)/"Avogadro's number"# So the number of moles of H atom in it #=(4xx5.2 xx10^24)/"Avogadro's number"# This is generally true of all gases except the inert gases. Feedback: On the particulate level, the coefficents of the chemical equation are interpreted in terms of molecules or atoms. Thank You! ", {color:#8f8f8f;}ul.footer_links li .ec_product_type6 .ec_image_container_none, .ec_product_type6 .ec_image_container_border, .ec_product_type6 .ec_image_container_shadow{ width:100%; max-width:100%; } .ec_special_heading{ color:#222222; } " As a professional sales person, I felt I had the necessary tools and materials to build a foundation, but Norman provided the blueprint for me to build a mansion. ", Super Class. ", C9H24 which contains the largest number of atoms 1.0 mol of CH3COOH 2.0 mol of H2SO4 3.0 mol of NH3 4.0 mol of K2S 5.0 mol of HCl 2.0 mol of H2SO4 if i have.. Therefore, in . .ec_categorywidget a, .ec_manufacturer_widget a, .ec_pricepoint_widget a, .ec_group_widget a, .ec_cartwidget a{ color:#222222; } .ec_product_li:nth-child( 1n+1 ) .ec_product_editor{ left:227px; } font-family:"Droid Serif"; Given: number of moles and molecular or empirical formula. It follows one-quarter of the arc of a circle with a radius of 10.0 m until, at t=1.60 s, it is traveling east. Two conversion factors will be used. #ec_cart_payment_hide_column{ display:none; } B. I and III only Compute the size of an 640*680 image at 240 pixels per inch? 5.9749 x 10. Use Avogadro's Number to Convert Molecules to Grams - ThoughtCo .ec_account_order_item_buy_button:hover, .ec_account_order_item_download_button:hover{ background-color:#666666; } .ec_cart_button_row > .ec_cart_button:hover, .ec_cart_button_row input[type="button"]:hover, .ec_cart_button_row a:hover{ background-color:#666666 !important; } how many hydrogen atoms in 32.0 grams of CH4. The reason is that the molar mass of the substance affects the conversion. .ec_details_magbox{ display:none; } #ec_cart_payment_one_column{ display:block; } window._wpemojiSettings = {"baseUrl":"https:\/\/s.w.org\/images\/core\/emoji\/12.0.0-1\/72x72\/","ext":".png","svgUrl":"https:\/\/s.w.org\/images\/core\/emoji\/12.0.0-1\/svg\/","svgExt":".svg","source":{"concatemoji":"https:\/\/www.excelsalesconsulting.com\/wp-includes\/js\/wp-emoji-release.min.js?ver=5.3.6"}}; .ec_price_container_type5:after{ border-color: #666666 transparent transparent #666666; } In each case, the number of grams in 1 mol is the same as the number of atomic mass units that describe the atomic mass, the molecular mass, or the formula mass, respectively. __C2H2(g) + __O2(g) __ CO2(g) + __ H2O(g), 3.0 dm3 of sulfur dioxide is reacted with 2.0 dm3 of oxygen according to the equation, What will happen to the volume of a fixed mass of gas when its pressure and temperature. .wpb_animate_when_almost_visible { opacity: 1; }. How many carbon atoms, hydrogen atoms, and lone pairs are in the molecule shown below? Molecular weight of C6H6 C6H6 molecular weight Molar mass of C6H6 = 78.11184 g/mol This compound is also known as Benzene. fadeoutDuration: 1, C. 30.0 cm3 of 0.300 mol dm-3 NaCl A mole is defined as the amount of a substance that contains the number of carbon atoms in exactly 12 g of isotopically pure carbon-12. Since the mass of the gas can also be measured on a sensitive balance . For example, the mass of 1 mol of magnesium (atomic mass = 24.305 amu) is 24.305 g. Because the atomic mass of magnesium (24.305 amu) is slightly more than twice that of a carbon-12 atom (12 amu), the mass of 1 mol of magnesium atoms (24.305 g) is slightly more than twice that of 1 mol of carbon-12 (12 g).
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