Lab Report 3 Moles

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.

How can we find out the formula?

Question 1 options: A. The Mole We will use the analogy of an elephant and its body parts to explore the concept of moles of compounds or elements. The elephant and the carbon tetrachloride, CCl4 molecule are the test cases. One elephant has one trunk and four legs One carbon tetrachloride molecule, CCl4, contains one carbon atom and four chlorine atoms 1 amu = 1.6606 x 10-24 g 1 dozen = 12 items 1 mole = 6.022 x 1023 items = Avogadro's Number   Critical Thinking Questions: (Give your answers in terms of a number such as 17 or 3.25 x 1015 trunks)   How many carbon atoms are found in one dozen carbon tetrachloride (CCl4) molecules?

lus_engine.html?ClassID=792755585# Sucrose has the molecular formula C12H22O11. If a sucrose sample contains 5.0 x 1022 atoms of carbon, how many molecules of sucrose are present in the sample? [?] molecules C12H22O11 Hint: How many atoms of C are in the sucrose molecule? Enter the coefficient in the green blank and the exponent in the yellow blank. Coefficient (green) Exponent (yellow) [?] x 10 mational Academy of Science. All Rights Reserved. h F6 ✡ a 8 Enter Home

+Using Molar Mass and AVO tab Part B Caffeine is a bitter stimulant drug and is found in varying quantities in seeds, leaves, and so on. Its formula is CH10N4O₂. Match the number of moles of each element found in the specified number of moles of caffeine. Match the numbers in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer. ► View Available Hint(s) caps lock esc Submit 1 alt 1.2 2.0 4.0 7.0 8.0 10 16 control option 28 F1 Q A N 5,388 2 ** F2 W S 1. There are 2. There are 3. There are 4. There are JUL 27 X #3 H command 80 F3 E D $ 4 с mol of carbon in 2.0 mol of caffeine. mol of nitrogen in 0.30 mol of caffeine. mol of oxygen in 3.5 mol of caffeine. mol of hydrogen in 2.8 mol of caffeine. DOO 000 F4 R F % 5 V F5 T G MacBook Air 6 B F6 Y & 18⁰ 7 H Reset Help tv F7 N U * 8 J F F8 M 9 K O F9 O H 1 0 L X command F10 P V W F11 BI alt { option [ ? F12 11 } ]

esc Measurements show that unknown compound X has the following composition: element iron 0 oxygen Write the empirical chemical formula of X. Explanation JAN mass % 69.9% 30.0% Check # X 200 S 888 F4 0/ F5 MacBook Air A F6 F7 © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center DII FB F9 A F10

Match the left column correctly with the right column.         Hg2CL2 molecular element Silicon dioxide atomic element Hydrosulfuric acid molar mass HIO4 si O2 NO mole Avogadro's Number H2S Isotopers NO2 Germanium Nitorgen monoxide O2 gas periodic acid   metalloid                                                                 mercury(I) chloride                                                                 Silicon oxide                                                                  percent natural abundance

A molecule contains 16.623% hydrogen, 2.078% oxygen, and no other element except carbon. What is the empirical formula? C = 12.01 g/mol H = 1.01 g/mol O 16.00 g/mol Make sure that you use the letter O not the number O for oxygen please! The computer system will not recognize zero as 'O! Make sure that your formula has a C first, then a H in the middle, then the oxygen. You will not be able to do subscripts so If the formula was CH₂O, you will need to type CH2O A/

b Learning Goal: To learn how to convert grams to moles and to use the mole to find the number of atoms in a sample. The mole (abbreviated mol) is a counting unit used to simplify calculations that would otherwise involve very large numbers. The mole is equivalent to the number of carbon atoms in exactly 12 g of isotopically pure 12C, or 6.02 x 1023. This number is known as Avogadro's number in honor of Amedeo Avogadro. "ock Avogadro's number can be used as a conversion factor between moles and atoms as shown here: The molar mass of a substance is the mass of one mole of a substance and is written in units of grams per mole. The molar mass of an atom is equivalent to its atomic mass whereas the molar mass of a substance is equivalent to its formula weight. esc ! 6.02x10 atoms 1 mole of atoms 1 Q A N @ 2 W S 3 X 2 Control option command H 80 E D $ 4 C Part A How many moles of atoms are in 5.00 g of 13 C? Express your answer numerically in moles. ▸ View Available Hint(s) a Part B…

An analytical chemist measures the amount of Elements E, and E₂ in four samples of an unknown Substance X: mass mass sample of E₁ of E₂ 1 2 3 4 12.2 g 13.8 g 12.5 g 14.4 g 6.1 g 6.9 g Continue It's known that X contains no elements other than E, and E. 11.7 g 13.3 g Using this information, answer the questions in the table below. Is X a pure substance or a mixture? If you don't have enough information to decide, choose can't decide. If you said X is a pure substance, calculate the mass of Element E, the analytical chemist would find in a new 10.0 g sample of X. Round your answer to 2 significant digits. Opure substance O mixture O (can't decide) U MacBook Air 0 X Ⓒ2023 McGraw Hill LLC. All Rights Reserved. Terms

Pls help, sorry for the trouble, ignore my handwriting

Show ALL your work.  Remember to follow significant digit rules and show proper format in all answers. NOTE: Record all molar mass values to 2 decimal places. Question: Calculate the number of ions in 7.15 g of RbNO3.

Please and the question below

F7 1/2 | - 100% + » c. 132.07 g/mol d. 29.02 g/mol e. 89.07 g/mol (2) How many molecules are in 30.1 g of sulfur dioxide? a. 1.81 x 10²5 b. 2.83 x 1023 c. 6.02 x 1023 d. 1.02 x 1024 e. 5.00 x 10-23 (3) How many moles of hydrogen are there in 6.50g of ammonia (NH³)? a. 0.382 mol b. 1.39 mol F8 c. 0.215 mol d. 1.14 mol e. 2.66 mol (4) What are the stoichiometric coefficients in the following equation when it is balanced? SiCl4(s) + H₂O(1)→ H₂SiO3(s) + HCl (g) a. 1,3,1,3 b. 1,1,3,4 c. 1,4,1,4 d. 1,3,1,4 e. 3,9,1,4 (5) Ammonia is produced by the reaction of nitrogen and hydrogen: N2(g) + H2(g) → NH3(g) Q Search F9 * F10 F11 Bb ☆ LO @ Home End Insert Delete

A sample of 7.55 g of Mg(OH)2 is added to 25.0 mL of 0.195 M HNO3. Part C How many moles of Mg(OH)2 are present after the reaction is complete? Express your answer in moles to three significant figures. moles Mg(OH)2 = mol %3! Submit Request Answer Part D How many moles of HNO3 are present after the reaction is complete? Express your answer in moles to three significant figures. ΑΣΦΦ mol moles HNO3 : Submit Request Answer Part E How many moles of Mg(NO3)2 are present after the reaction is complete? Express your answer in moles to three significant figures. ΑΣφ

Information for Parts B, C, and D A compound is 80.0% carbon and 20.0% hydrogen by mass. Assume a 100.-g sample of this compound. Part B How many grams of each element are in this sample? Enter the number of grams of carbon followed by the number of grams of hydrogen, separated by a comma (e.g., 30.0,70.0).

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