An intraoperative cholangiogram shows that the ducts are finally cleared of stones at the conclusion of the surgery. The mole is used in chemistry to represent [latex]6.022\times {10}^{23}[/latex] of something, but it can be difficult to conceptualize such a large number. which sample has the largest mass 1 mole of marshmallows. Which sample has the largest mass? 5.The two masses have the same numerical value, but the units are different: The molecular mass is the mass of 1 molecule while the molar mass is the mass of [latex]6.022\times {10}^{23}[/latex] molecules. 0.8 mole of O 2 - ; No of moles of O 2 = 0.8, Mass of one mole of O 2 = 2 x . How is a mole similar to a dozen? + Example - Socratic.org Analysis of a sample of a covalent compound showed that it contained 14.4% hydrogen and 85.6% carbon by mass. The same goes for #10# molecules of each substance, #100#, #1000#, and #6.022 * 10^(23)#. A 10 gram sample of which substance contains the greatest number of hydrogen atoms? Which sample has the largest mass? The company has just opened a new, Dispatch has sent you to the scene of a fight at a local sporting event. How can I calculate the moles of a solute. The mass in grams of 1 mole of substance is its molar mass. The density of a substance is the mass of the substance divided by the volume of the substance. The result is in agreement with our expectations as noted above, around 0.04 g Ar. How do you calculate the number of moles from volume? PQ-1. Suppose an airplane is flying 2.230km2.230 \mathrm{~km}2.230km above the line connecting the broadcast antenna and your radio, and that waves reflected from the airplane travel 88.0088.0088.00 wavelengths farther than waves that travel directly from the antenna to your house. So, in order to answer the question, "Which sample has the largest mass 1 mole of marshmallows? which sample has the largest mass 1 mole of marshmallows. Which sample has the largest mass? Marshmallow Fluff does not contain creme of tartar and xanthan gum, two ingredients that are often found in Marshmallow Creme. Th, At the county fair, Chris throws a 0.12kg baseball at a 2.4kg wooden milk bottle, hoping to knock it, An oil company is interested in estimating the true proportion of female truck drivers based in five, When writing a formal business report, you should begin by __________. mole of , 4.The mole. This is because marshmallows are made up of mostly sugar, while lead is a metal. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter. Chapter 3 formula calculations and mole Flashcards | Quizlet 1 See answer Advertisement Advertisement yavcak156 yavcak156 Answer: B. Avogadro's number equals the number of (A) atoms in one mole of O2 (B) atoms in one mole of atoms. arrow_forward. This experimental approach required the introduction of a new unit for amount of substances, the mole, which remains indispensable in modern chemical science. 3. This gives us a mass of 1 mole of marshmallows as 3.011 x 10^23 grams. 7. Which sample has the largest mass? That depends on what you are looking for. A) 1 mole of marshmallows B) 1 mole of Pb atoms C) 1 mole of CO 2. nceptual (A), 3.PQ-L. pnceptuci Which sample has the largest mass? However, because a hydrogen peroxide molecule contains two oxygen atoms, as opposed to the water molecule, which has only one, the two substances exhibit very different properties. 20 marshmallows = 1 score of marshmallows. In order to be able to convert this molecular scale to something that's more familiar to us, like grams, we needed to group a whole lot of these molecules together. How far, The Progressive Era included_____ involving equality, suffrage, improvement in the general welfare o, The American Expeditionary Force contribution to World War I a. played a relatively minor role i, The brother-in-law of an agent of a broker-dealer has asked the agent if he will be willing to offer, The act that first emphasized that broadcasters did not own their channels but were granted licenses, High Country, Inc., produces and sells many recreational products. (credit: Sahar Atwa). This difference in mass is due to the different types of atoms that make up each substance. 8.4 Gas Laws | The Basics of General, Organic, and Biological Chemistry Copper wire is composed of many, many atoms of Cu. Using the average atomic masses given inside the front cover of this hook, calculate the mass in grains of each of the following samples. Moleis a counting unit in chemistry used which sample has the largest mass 1 mole of marshmallows. So, in order to answer the question, "Which sample has the largest mass 1 mole of marshmallows? Now that we know the number of marshmallows in one mole, we can calculate the mass of one mole of marshmallows. It is popular for its sweet and simple taste. What is the wavelength of the radio waves? bags of regular marshmallows in a carton. The reverse of a spontaneou, The American automobile industry was historically dominated by The Big Three, referring to General, The authority of a court to review and possibly invalidate laws or executive actions that it determi, Marco is from the Mediterranean coast of Greece and Forough is from Iran. Which sample has the largest mass? In the compound (NH4)2S20 3, which element is present in the largest percent by mass? PPT I. Molar Conversions - Copley Which sample has the largest mass? Which sample has the largest mass? Explain why. Mathematically, this is written as. Formic acid. In that case, it is clear that lead has the larger number of moles. luminosity. This would be the sample with the mass of 3.011 x 10^23 grams. The number of Cu atoms in the wire may be conveniently derived from its mass by a two-step computation: first calculating the molar amount of Cu, and then using Avogadros number (NA) to convert this molar amount to number of Cu atoms: Considering that the provided sample mass (5.00 g) is a little less than one-tenth the mass of 1 mole of Cu (~64 g), a reasonable estimate for the number of atoms in the sample would be on the order of one-tenth NA, or approximately 1022 Cu atoms. Which sample has the largest mass? Marshmallows are usually made from a mixture of sugar, cornstarch, and gelatin. 1 mole of Pb (lead) atoms C. 1 mole of CO2 (carbon dioxide) molecules D. All of these have the same mass A large marshmallow might weigh the same as a small piece of lead, but it will take up a lot more space. So if you're curious about trying it out for yourself, you may need to cross your fingers and hope for the best. Which of the following has the largest number of molecules? fjords, norway cruise capital radiology 157 scoresby road boronia capital radiology 157 scoresby road boronia (A) 4 g of hydrogen (molar mass 2) corresponds to 2 moles of molecules or 4N number of atoms where N is the Avogadro's number ( 6.02310 23 ). How big is a mole? Which sample has the largest mass? We can derive the number of moles of a compound from its mass following the same procedure we used for an element in Example 3: The molar mass of glycine is required for this calculation, and it is computed in the same fashion as its molecular mass. - 29903591. brockmorrison2003 brockmorrison2003 12/13/2022 Chemistry High School answered expert verified Which sample has the largest mass? Marshmallows, on the other hand, are very light and fluffy. How far Which sample has the largest mass? Save my name, email, and website in this browser for the next time I comment. According to the definition of the mole, 12 g of 12 C contains 1 mole of 12 C atoms (its molar . The definition of atomic mass, the mole, and molar mass are all directly or indirectly related to carbon-12. The final factor to consider is shape. the density of hydrogen peroxide. 1. (A) CaC03 (B) CaS03 (C) Li2C03 (D) LbS03. Your sample will contain. There is no clear winner in this comparison, as both peanut butter and marshmallow fluff are high in calories and sugar. PLEASE WALK ME THROUGH THIS: The bus to the exposition averaged 18 miles to a gallon of gas. First of all, it's always a good idea to start with what a mole actually means, that way you can be sure that you know what you're looking at here. A) 1 mole of marshmallows B) 1 mole of atoms C) 1 mole of molecules D) All of these have the same mass. This is because marshmallows are not very dense. Correct option is A) 4 g of hydrogen contains the largest number of atoms. Study.com, 9.One mole of sugar has a greater mass than one mole of water, how , which sample has the largest mass 1 mole of marshmallows, View 10+ sunny day care center is highly appreciated, View now 10+ watch highway thru hell online free most viewed, View now 9+ spirited away music box most viewed, 10+ pestana quinta do arco nature & rose garden hotel most standard. For example, water, H2O, and hydrogen peroxide, H2O2, are alike in that their respective molecules are composed of hydrogen and oxygen atoms. Today, we possess sophisticated instruments that allow the direct measurement of these defining microscopic traits; however, the same traits were originally derived from the measurement of macroscopic properties (the masses and volumes of bulk quantities of matter) using relatively simple tools (balances and volumetric glassware). E) 3.01 10. The mass of one atom of carbon-12 the atomic mass of carbon-12 is exactly 12 atomic mass units. Answered: Which of the following samples has the | bartleby P 1 V P 1 V. Vitamin C is a covalent compound with the molecular formula C6H8O6. Now, you can go from moles of sucrose to number of molecules of sucrose by using Avogadro's constant, which is essentially the definition of a mole. The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. The question which sample has the largest mass 1 mole of marshmallows is still in your head anytime and anywhere, but it is impossible to find the most accurate answer, that is why camnanghaiphong.vn was give the most detailed and accurate answers, helping you get the answer to your which sample has the largest mass 1 mole of marshmallows question as desired. which sample has the largest mass 1 mole of marshmallows So one molecule of water will have a smaller mass than one molecule of sugar, since it contains fewer atoms. Which of the following statements is FALSE? Molar Mass (Molecular Weight) - Definition, Formula & Examples of Molar A) 1 mole of Chegg, 2.Solved PQ-1. particles in 1 mol of a substance. If a copper penny weighing 3.045g3.045 \mathrm{~g}3.045g is dissolved in a small amount of nitric acid and the resultant solution is diluted to 50.0mL50.0 \mathrm{~mL}50.0mL with water, what is the molarity of the Cu(NO3)2\mathrm{Cu}\left(\mathrm{NO}_3\right)_2Cu(NO3)2 ? First, convert the grams to moles using the molar mass and then use Avogadro's number to find the number of molecules: This calculation tells you that there are 2.1 x 10 22 molecules of NaCl in 2 grams of NaCl. You can refer to, The following summaries about two goats in a boat will help you make more personal choices about more accurate and faster information. mrs elliott WordPress.com, 5.Chem 104 ACS Final CHAPTER 3 Flashcards Quizlet, 7.What is the Mole Concept? How do you calculate the number of ions in a solution? - Vedantu 1.26 mol HCl; How many water molecules are in a 0.265 g sample? What is the Mole? Th, At the county fair, Chris throws a 0.12kg baseball at a 2.4kg wooden milk bottle, hoping to knock it, An oil company is interested in estimating the true proportion of female truck drivers based in five, When writing a formal business report, you should begin by __________. (Video) Mometrix, 9.One mole of sugar has a greater mass than one mole of water, how , 10.Which sample has the greatest mass? A) 1 mole of Chegg, 2.Solved PQ-1. Mole (unit) - Simple English Wikipedia, the free encyclopedia How does insulin stimulate glycogen synthesis. To put it into perspective, one large marshmallow has a volume of approximately 9 cubic centimeters (ccs), while lead fails to even come close with a measly 7.5 ccs. Therefore, 20.0 g H2O represents the least number of molecules since it has the least number of moles. 1 dm 3 is the same as 1000 cm 3, so the value in cubic centimetres needs to be divided by 1000. Notice that one molecule of sucrose contains, Water has the chemical formula #"H"_2"O"# and it contains. How far, The Progressive Era included_____ involving equality, suffrage, improvement in the general welfare o, The American Expeditionary Force contribution to World War I a. played a relatively minor role i, The brother-in-law of an agent of a broker-dealer has asked the agent if he will be willing to offer, The act that first emphasized that broadcasters did not own their channels but were granted licenses, High Country, Inc., produces and sells many recreational products. How many hemoglobin molecules is this? In other words, a single marshmallow has close to 30% more volume than an entire chunk of lead! Get started with your FREE initial assessment!https://glasertutoring.com/contact/#MolesToMolecules #MolesToGrams #OpenStaxChemistry One mole of a substance is equal to the amount of that substance that has a mass of 6.022 x 10^23 atoms or molecules. Boyle's Law. (A) I mole of marshmallows (C) 1 mole of C02 (carbon dioxide) molecules (B) I mole of Pb (lead) atoms (D) All of these have the same mass. 1 ago. PQ-1. The density of marshmallows is 0.5 grams per cubic centimeter. Because atoms and molecules are extremely small, there are a great many of them in any macroscopic sample. The mass of each compound is as follows: 15. moi-1 What is the most likely formula for the stable ion of X? 6.02 1023lmarshmallows = 1 mol of marshmallows. Which sample has the largest mass? (credit: Emilian Robert Vicol). An engagement ring contains a diamond weighing 1.25 carats (1 carat = 200 mg). four moles of hydrogen. The number of molecules in a single droplet of water is roughly 100 billion times greater than the number of people on earth. Determine the number of moles of the compound and determine the number of moles of each type of atom in each of the following: [latex]3.3\times {10}^{-2}\text{ mol }{\text{Na}}_{2}{\text{CO}}_{3}[/latex], [latex]1.23\times {10}^{3}\text{ mol fructose, }{\text{C}}_{6}{\text{H}}_{12}{\text{O}}_{6}[/latex], The approximate minimum daily dietary requirement of the amino acid leucine, C. Determine the mass in grams of each of the following: A 55-kg woman has [latex]7.5\times {10}^{-3}\text{mol}[/latex] of hemoglobin (molar mass = 64,456 g/mol) in her blood. Marshmallows are essentially just sugar, water, and gelatin. ACS Study Guide Flashcards - Quizlet Clock-wise from the upper left: 130.2g of C8H17OH (1-octanol, formula mass 130.2 amu), 454.9g of HgI2 (mercury(II) iodide, formula mass 459.9 amu), 32.0g of CH3OH (methanol, formula mass 32.0 amu) and 256.5g of S8 (sulfur, formula mass 256.6 amu). l type='a'> 0.341 mole of potassium nitride 2.62 mmol of neon (1 mmol = 1/1000 mol) 0.00449 mole of manganese (II) oxide 7.18105moles of silicon dioxide 0.00021 mole of iron (III) phosphate. B) amu in 1 mol of a substance. However, since there is no confirmed information as to whether or not this flavor will ever make its way over to the United States, it's hard to say for sure! By the end of this section, you will be able to: The identity of a substance is defined not only by the types of atoms or ions it contains, but by the quantity of each type of atom or ion. Which part of a chemical formula indicates the number of copies of molecules or compounds? According to the definition of the mole, 12 g of 12C contains 1 mole of 12C atoms (its molar mass is 12 g/mol). How many moles of glycine molecules are contained in 28.35 g of glycine? (Video) Mometrix, 8.True or false? There is no definitive answer to this question as the amount of mass will depend on the size and quantity of each object. This can be done by using theAvogadro's number. When saliva is mixed with these ingredients, it creates a sticky consistency. }[/latex] What is the mass of this allowance in grams? This is why one mole of sugar has a bigger mass than one mole of water, because one molecule of sugar has a bigger mass than one molecule of water. (Get Answer) - Which sample has the largest mass? A) 1 mole of 6.10 Quiz: Calculating Yields of Reactions, Chemistry 6.04 Quiz: Mole-Volume Relationships, Period / Unit 4 AP World History Review (AMSC, Bruce Edward Bursten, Catherine J. Murphy, H. Eugene Lemay, Matthew E. Stoltzfus, Patrick Woodward, Theodore E. Brown. How many moles of the substance do you have? In fact, one cubic centimeter of lead weighs in at a whopping 11 grams. Solved 61. Which sample has the largest mass? A) 1 mole of - Chegg Your email address will not be published. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter. Answer: Globalizethis aggregates which sample has the largest mass 1 mole of marshmallows information to help you offer the best information support options. After all, lead is a dense metal, and as such, it is quite heavy. Finally, marshmallows are safe to eat, while lead is poisonous. In order to answer this question, we must first understand what a mole is. All information published on this website is provided in good faith and for general use only. This is because lead atoms have more protons in their nucleus than sugar atoms. which sample has the largest mass 1 mole of marshmallows to determine its molecular formula, it is necessary to know: answer choices. You can refer to the answers, The following summaries about ugg mini goat color will help you make more personal choices about more accurate and faster information. Explain why.OpenStax is a registered trademark, which was not involved in the production of, and does not endorse, this product.If you don't have the OpenStax \"Chemistry: Atoms First\" textbook, here is a link in which you can download it for FREE!https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/ChemistryAtomsFirst2e-OP_T2wT7wj.pdfSUBSCRIBE if you'd like to see more solutions for your textbook!https://www.youtube.com/channel/UC2C34WdYMOm47PkWovvzLpw?sub_confirmation=1Want us as your private tutor? We don't have your requested question, but here is a suggested video that might help. Since the amount of Ar is less than 1 mole, the mass will be less than the mass of 1 mole of Ar, approximately 40 g. The molar amount in question is approximately one-one thousandth (~103) of a mole, and so the corresponding mass should be roughly one-one thousandth of the molar mass (~0.04 g): In this case, logic dictates (and the factor-label method supports) multiplying the provided amount (mol) by the molar mass (g/mol): [latex]9.2\times {10}^{-4}\cancel{\text{mol}}\text{Ar}\left(\frac{39.95\text{g}}{\cancel{\text{mol}}\text{Ar}}\right)=0.037\text{g Ar}[/latex]. This means that there are lead atoms. Explain why. a. developing a statement of, Calculate the percentage by mass of oxygen in nh4, How can you test the complete separation of camphor and sand. Per the amu definition, a single 12C atom weighs 12 amu (its atomic mass is 12 amu). There are a few key differences between marshmallows and lead. Learn More: Which sampling method does not require a frame? Marshmallows, on the other hand, are fluffy, light, and airy. Learn More: What is the amount in moles of each elemental sample? View solution > View . Which sample has the largest mass? This number is equal to 6.022 x 10^23. Calculate the number of moles of each species, then remember that 1 mole of anything [latex]=6.022\times {10}^{23}[/latex] species. Consistent with its definition as an amount unit, 1 mole of any element contains the same number of atoms as 1 mole of any other element. (A) I mole of marshmallows (C) 1 mole of C02 (carbon dioxide) molecules (B) I mole of Pb (lead) atoms (D) All of these have the same mass. Which sample has the largest mass? A. 1 mole of marshmallows B. 1 mole Performing the calculation, we get: [latex]1.42\times {10}^{-4}\cancel{\text{mol}}\text{vitamin C}\left(\frac{176.124\text{g}}{\cancel{\text{mol}}\text{vitamin C}}\right)=0.0250\text{g vitamin C}[/latex]. which sample has the largest mass 1 mole of marshmallows. One 55-gram serving of a particular cereal supplies 270 mg of sodium, 11% of the recommended daily allowance. However, lead is generally much denser than marshmallows, meaning that it has a higher mass per unit of volume. You have 200 g of a substance with a molar mass of 150 g/mol. 10 grams of H2. Determine the number of atoms and the mass of zirconium, silicon, and oxygen found in 0.3384 mol of zircon, ZrSiO, Determine which of the following contains the greatest mass of hydrogen: 1 mol of CH, Determine which of the following contains the greatest mass of aluminum: 122 g of AlPO. As for elements, the mass of a compound can be derived from its molar amount as shown: The molar mass for this compound is computed to be 176.124 g/mol. One mole is 6.022 x 10 23 of the microscopic particles which make up the substance in question. Which sample has the largest mass? 2.8: The Mole - Chemistry LibreTexts Which contains the greatest mass of oxygen: 0.75 mol of ethanol (C, Which contains the greatest number of moles of oxygen atoms: 1 mol of ethanol (C. How are the molecular mass and the molar mass of a compound similar and how are they different? Therefore, marshmallows have a larger atomic mass than lead. Which compound contains the greatest percentage of nitrogen? Atoms and molecules are very, very small, which of course implies that they have very, very small masses, much, much smaller than the scale we're used to in our daily lives. Density does not change the identity of the substance; it, Problems associated with a declining population size include. Learn More: Where to buy duraseal stain samples? A mole is a unit of measurement that is used to measure the amount of a substance. 3.8 | Compare 1 mole of H2, 1 mole of O2, and 1 mole of F2 - YouTube So, why does one mole of sugar weight more than one mole of water? How many moles and atoms of sodium are in the recommended daily allowance? The molar mass of an element (or compound) is the mass in grams of 1 mole of that substance, a property expressed in units of grams per mole (g/mol) (see Figure 1). Answered: Which gas sample has the greatest mass? | bartleby Therefore, the mass of one marshmallow is 0.5 grams. When comparing the two substances, lead is much more dense than marshmallows. The whole ratio, the 98.08 grams/1 mole, is the molar mass of sulfuric acid. Learn More: Why do companies lower product prices and offer free samples? More : Question: 61. To calculate the mass of 1 mol of Na2S we need just to multiply it by it's molar mass: 78,0452 g/mol. Calculation:- 16 grams of O 2 - ; No. nceptual (A) 1 mole of marshmallows (B) 1 mole of Pb (lead) atoms (C) 1 mole of CO2 (carbon dioxide) molecules (D) All of these have the same mass. This is because marshmallows are not very dense. Avogadro's number, #6.022 * 10^(23)#. Explanation: Advertisement Advertisement New questions in Chemistry. Menu. The mole provides a method for how to count atoms in a sample. Explain why. What mass of fluorine atoms in mg was present? Which sampling method does not require a frame? Since the EMS system is bus, s each statement true or false? Answers One : Question Lists Recent : PLEASE WALK ME THROUGH THIS: The bus to the exposition averaged 18 miles to a gallon of gas. If the amount of gas in a sample and its temperature are kept constant, then as the pressure of a gas is increased, the volume of the gas decreases proportionately. Hope that helps. The main difference between lead and marshmallows is their mass. a. developing a statement of, Calculate the percentage by mass of oxygen in nh4, How can you test the complete separation of camphor and sand. Zirconium: [latex]0.3384\cancel{\text{mol}}\times 6.022\times {10}^{23}{\cancel{\text{mol}}}^{\cancel{-1}}=2.038\times 1023\text{atoms;}0.3384\cancel{\text{mol}}\times 91.224\text{g/}\cancel{\text{mol}}=30.87\text{g;}[/latex] Silicon: [latex]0.3384\cancel{\text{mol}}\times 6.022\times {10}^{23}{\cancel{\text{mol}}}^{\cancel{-1}}=2.038\times {10}^{23}\text{atoms;}0.3384\cancel{\text{mol}}\times 28.0855\text{g/}\cancel{\text{mol}}=9.504\text{g;}[/latex] Oxygen: [latex]4\times 0.3384\cancel{\text{mol}}\times 6.022\times {10}^{23}{\cancel{\text{mol}}}^{\cancel{-1}}=8.151\times {10}^{23}\text{atoms;}4\times 0.3384\cancel{\text{mol}}\times 15.9994\text{g/}\cancel{\text{mol}}=21.66\text{g}[/latex]. Determine the molar mass and, from the grams present, the moles of each substance. This number is equal to 6.022 x 10^23. The density of a substance is the mass of the substance divided by the volume of the substance. For example, the mean molecular weight of water is 18.015 atomic mass units (amu), so one mole of water weight 18.015 grams. This is because a lead atom is much larger than a marshmallow molecule. E) moles in 6.02 10 amu of an element. The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. Molar mass = mass/mole = g/mol. If I have 6.02 x 1023 pennies, how many do I have? a 1 g of benzene, C6H6 b l g of formaldehyde, CH2O c l g of TNT, C7H3N3O6 d l g of naphthalene, C10H8 e . The compound with the greatest number of moles of Al has the greatest mass of Al. Hard. To do this, we must first calculate the number of marshmallows in one mole. Verified answer. Your sample will contain. The calculated magnitude (0.12 mol K) is consistent with our ballpark expectation, since it is a bit greater than 0.1 mol. D) All of these have the same mass. If9.03x 1020 of these XeFn molecules have a mass of0.311 g, what is the value of n? Likewise, in order to have have one mole of water, you need to have #6.022 * 10^(23)# molecules of water. The correct answer is 6.02 10 23 molecules of O 2.. Key Points. (B) 16 g of oxygen (molar mass 32) corresponds to 0.5 moles of molecules or N number of atoms where N is the Avogadro's number . What is the mass of Ar in a liter of air? 1 mol CH3OH weighs 32.0 g 14. Because an individual molecule of sugar weighs more than an individual molecule of water. A) 1 mole of marshmallows B) 1 mole of atoms C) 1 mole of molecules D) All of these have the same mass. Our bodies synthesize protein from amino acids. 12(12.011) + 22(1.00794) + 11(15.9994) = 342.300 g/mol; Then [latex]0.0278\text{mol}\times 342.300\text{g/mol}=9.52\text{g sugar. To do this, we simply need to multiply the mass of one marshmallow by the Avogadro's number. Any action you take based on the information found on cgaa.org is strictly at your discretion. Basically it says there are 98.08 grams per 1 mole of sulfuric acid. Explain why. Previous question Next question. PQ-1. [Solved] Which of the following sample has greatest mass? - Testbook All of the above are true. Marshmallows have a larger molar mass than lead. All spontaneous reactions occur quickly. Experts are tested by Chegg as specialists in their subject area. The given mass of K (4.7 g) is a bit more than one-tenth the molar mass (39.10 g), so a reasonable ballpark estimate of the number of moles would be slightly greater than 0.1 mol.