(a) Which has more atoms: a kilogram of hydrogen or a kilogram of lead? Which has more mass? (b) Which has more atoms: a mole of hydrogen or a mole of lead? Which has more mass? Explain your reasoning.

Q: Describe how elements are combined into molecules andcompounds.

A: Chemical bonds link elements together to form more complex molecules called compounds. A compound…

Q: What is the mass of 17 oxygen molecules to 3 significant figures?

A: 1mole  O2  molecules weight=32g6.023×1023  molecules of O2  weight =32gtherefore,  1molecules of  O2…

Q: If 1.00 g of gray zinc powder reacts with 0.49 g of yellow sulfur powder, what is the mass of the…

A: Given : Mass of gray zinc powder = 1.00 g Mass of  yellow sulfur powder = 0.49 g Mass of ZnS = ?

Q: what is the mass of carbon in 16.0 g of methane? -please round atomic masses to the nearest tenth.

A: Molecular formula of methane is CH4. Now calculate its molecular mass. Atomic mass of Carbon is 12g,…

Q: What is the mass, in grams, of 1.51 ×-1018 atoms of gold present in one nanoparticle? eTextbook and…

A: Given: Number of gold atoms = 1.51 × 1018 atoms.

Q: If 20 g of calcium are found in the compound calcium chloride, how many grams of chlorine are…

A: Molecular formula of calcium chloride: CaCl2 Molar mass of Ca: 40.08 g/mole Molar mass of Cl: 35.45…

Q: Given that I-127 is the only natural isotope of iodine, what is the mass of one I atom and…

A: Given :  Given that I-127 is the only natural isotope of iodine, what is the mass of one I atom…

Q: How many grams of Al are in 7.23 x 10²* Al atoms? Enter your answer to the ones place,

A: Convert the number of atoms into moles by using Avogadro Number and then determine the mass in grams…

Q: Find the mass in grams of C3H8O (isopropyl alcohol) that would contain 5.44x10^25 C atoms.

A: The question is based on mole concept. We have to calculate mass of alcohol present in the given…

Q: How many helium atoms are there in a helium blimp containing 537 kg of helium? Express the number of…

A: Given,Mass of helium = 537 kg                                   = 537 × 103 g     (1 kg = 103 g )…

Q: What three types of information does a balanced chemicalequation provide? How?

A: Balanced chemical equation for a chemical reaction is the one that has same number of atoms on both…

Q: How many grams of zinc will contain the same number of atoms as 24.6 g of copper? Express your…

A: Given weight = 24.6 g of copper

Q: For the molecular compound carbon tetrachloride, what would you multiply "molecules of CCl4" by to…

A: Given : Compound is carbon tetrachloride i.e CCl4. And number of molecules of CCl4 is given. To Find…

Q: What is the mass percent of chlorine in sodium chloride?

A: Mass of one mole of chlorine=35.43 Mass of one mol sodium chloride (NaCl)=58.44 g The mass…

Q: Convert 1.89 • 1024  atoms of carbon to coles of carbon

A: Given, the number of moles of carbon atoms = 1.89 x 1024 atoms 1 moles of carbon atom = 6.022 x 1023…

Q: How many corner atoms are shown in this image? number of corner atoms: What fraction of each corner…

A: In any cubic unit cell Corner-8 Face -6  Center-1 Edge -12

Q: How many total atoms, elements, and molecules are in 8K2SO4?

A: The molecular formula of the molecule is K2SO4. The number of K2SO4 molecule is eight 8K2SO4.

Q: . How many MOLECULES of water are present in 9.27 grams of this compound?

A:

Q: What is the mass, in grams, of 557 copper atoms?

A: We have to calculate the mass, in grams, of 557 copper atoms.

Q: In the compound CGH1303, what percent by mass is hydrogen? In Na2CO3, what percent (by mass) is C?…

A: Three different questions about finding the percent composition of individual elements in a…

Q: How many atoms of calcium are in 1.00 g?

A: Given  Mass of calcium    = 1 gram  Number of atoms = ?

Q: Estrogen (estriol) is a steroid that has the formula C18H2403. What is the mass of carbon in a 50.0…

A: Given:  Molecular formula of estrogen= C18H24O3  Mass of estrogen given= 50g

Q: Calculate the mass percentage of oxygen in the organic molecule whose line structure is shown below.…

A:

Q: The average nicotine (C10H14N2) content of a Camel cigarette is 1.93 mg. Suppose an individual…

A: The average nicotine (C10H14N2) content of a Camel cigarette is 1.93 mg.

Q: How do I determine the number of atoms for a given element that are in a compound?

A: Some rules should be followed to calculate Number of elements in a compound.

Q: How many grams of K2C2O4, potassium oxalate, would containe 182 grams of pure potassium?

A: The molar mass of potassium oxalate can be calculated as:

Q: What is the percent mass of carbon in H2C2O4?

A: Hydrocarbons are compounds made up of carbon and hydrogens. An organic acid is an organic compound…

Q: Calculate the number of atoms in each of the element in 1.0253 g of glucose, C6H12O6.

A: Given: Mass of C6H12O6 = 1.0253 g.

Q: (a) What percentage of the electrons originally in the cube was removed? % (b) By what percentage…

A:

Q: 16. While cleaning your attic, you find your old rock collection. If 74.2% of the rocks have a mass…

A: If a substance is present in more than one form then average mass of that substance given by…

Q: 1. The average person uses ~ 1.00 gram of sodium chloride per day. How many calendar days would it…

A: The number of constituent particles or atoms present in one mole of a substance is equal to 6.023 ×…

Q: What is the mass % of carbon in dimethylsulfoxide (C2H6SO)

A: We have to calculate the mass % of carbon.

Q: State the number of protons in Ag^+. Express your answer as an integer.   State the number of…

A: Electronic configuration of Ag (47) = 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s1 Number of protons…

Q: The following compounds could be separated by which one of the options for Separation of Mixtures:

A: The following compounds could be separated by which one of the options for Separation of Mixtures:

Q: How would you find the log of the mass of stearic acid in units of Da?

A: The mass of stearic acid is 284.5 g/mol. Da is the atomic mass unit that is used to measure the mass…

Q: What is Brownian motion? How is it related to the development of the idea that matter is…

A: The collision of microscopic particles suspended in either liquid or gas makes the particles travel…

Q: the Daily Value for saturated fat is 20 grams (g), which equals 100% DV. If the Nutrition Facts…

A: Since daily value helps you to make informed food choices. It is labelled on right-hand side of…

Q: 2) A piece of magnesium metal was placed in a test tube containing hydrochloric acid. If I start…

A: Magnesium reacts with HCl to give MgCl2 and H2. The Balanced equation of the following reaction is…

Q: What is the mass of one mole of Sg?

A: Mass of one mole of any element means it's molar mass

Q: mothball, composed of naphthalene (C10H8C10H8), has a mass of 1.48 gg . How many naphthalene…

A: Mass= 1.48gm MOLAR mass= 128 Mole= mass÷molar mass Mole= 1.48÷128= 0.011 Molecule= mole×6×1023…

Q: A large number of atoms of the same kind is

A: Matter is classified into following types  1 Pure  substances        2. Mixture    1. In Pure…

Q: nonmetals?

A: Non-metals are defined as elements which are present on the right side of the periodic table, it can…

Q: How much money, in dollars, does one mole of nickels represent?   If this amount of money were…

A: A Nickel is a currency coin mainly used in United States of America. The value of one nickel coin is…

Q: If you have 1.45x10^25 atoms of potassium, how many moles of potassium do have? Round to significant…

A: Number of atoms can be calculated by multiplying number of moles with Avogadro number.

Q: b. What is the role of iodine in the human body? c. How many milligrams of iodine would be a typical…

A:

Q: Seven moles of sulfur dioxide, SO2, would consist of how many molecules?

A:

Q: 6.61 x1019 molecules of hydrogen gas,(H2) are equal to how many grams of hydrogen gas?

A: SOLUTION 6.022×1023 molecules of H2 gas is equal to 1 mol of H2 gas. 1 molecule of H2 gas is…

Q: A 42.20 gram sample of a hydrate of CoCl, was heated thoroughly in a porcelain crucible, until its…

A: We can determine the fomula by calculating the number of moles of CoCl2 and water present.

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.