Be sure to answer all parts. Calculate the number of atoms in 0.422 g of potassium (K). Enter your answer in scientific notation. x 10 atoms

Q: Part B How many grams are in 0.290 mole of Cl2 ? Express your answer to three significant figures.

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: A sample of methane, CH4 , has a mass of 77.00g. Calculate the number of methane molecules in the…

A: Mole concept: According to the mole concept, the number of methane molecules in one mole of methane…

Q: Determine the number of atoms in 55.0 grams of sodium, Na. (The mass of one mole of sodium is 22.99…

A: Here given, the mass of one mole of sodium is 22.99 g. So, in 55 grams of sodium, there are…

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: Identify the choice that best completes the statement or answers the question. Analysis of a…

A: According to law of constant proportion, the ratio of mass of elements in any fixed compound will…

Q: How many iodine atoms are present in 4.10 moles of diatomic iodine? Give your answer in scientific…

A: Given: The number of moles of diatomic iodine=4.10 moles To calculate: The number of iodine atoms.…

Q: How many moles of cobalt (Co) atoms are there in 6.00 × 10° (6.00 billion) Co atoms? x 10 mol Enter…

A:

Q: A mole of carbon has a mass of 12.01 g. and a mole of aluminum has a mass of 26.98 g. • Define what…

A: The mole is the standard unit of measurement for amount of substances. The mole is essentially a…

Q: A sample of oxygen contains 7.1 x 1020 atoms. How many moles are in this sample? Your answer should…

A: One mole of a substance contains 6.022×1023 particles(atoms/ions/molecules).In this problem,we've to…

Q: Determine the mass in grams of 5.90 × 10²¹ atoms of arsenic. (The mass of one mole of arsenic is…

A: Given that:  Atoms of arsenic = 5.90×1021 Mass of arsenic = 74.92g  1mole = 6.023×1023 atoms

Q: A.)What mass of cobalt contains the same number of atoms as 77.0 g of fluorine?

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Rose gold is a mixture of gold, copper, and silver atoms. It contains 58.3% gold, 33.5% copper, anc…

A: To solve this problem first we calculate the mass of rose gold then we calculate the mass of copper…

Q: The molar mass of strontium (Sr) is 87.62g/mol. Calculate the number of atoms in a 67.5 mg sample of…

A:

Q: Tia has a sample of pure gold (Au). She weighed the sample and the result was 96.896.8 grams. Tia…

A: Formula used: Moles = Mass/ Molar Mass Number of atoms = Moles x Avagadro Number

Q: If a sample contained 9.65 x 1023 atoms of iodine, how many grams would this be? Round to one…

A:

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: Calculate the mass in grams of 3.96 x 1024 molecules of dichlorine hexaoxide. Enter your answer in…

A: The compound given is dichlorine hexaoxide. From the name we can see that the compound will have 2…

Q: 1.28 x 1023 molecules of C10H22 would have what number of carbon atoms? How many moles are there in…

A:

Q: 6.79 moles of sulfur trioxide molecules contain how many oxygen atoms?1.23 x 10^25 SO3 I need how to…

A: Given :  Moles of SO3 (sulfur trioxide) = 6.79  1 mole of means NA (Avogadro's number) atoms.…

Q: Calculate the number of atoms in 95.3 μg of scandium. Enter your answer in scientific notation.

A: Given,  95.3 μg of scandium

Q: Determine the mass in grams of 3.00 x 1021 atoms of arsenic. (The mass of one mole of arsenic is…

A: Given : number of arsenic atoms = 3.00 X 1021 atoms  mass of 1 mole of arsenic = 74.92 g

Q: Determine the mass (in grams) of aluminum present in 1.07 grams of Al2S3? Do not type units into…

A:

Q: Determine the number of atoms in 31.0 grams of bromine, Br. (The mass of one mole of bromine is…

A:

Q: A sample of methane, CH4, has a mass of 58.25 g. Calculate the number of methane molecules in the…

A: Given mass of CH4 = 58.25 g Molar mass of CH4 = 16.04 g

Q: 6. This Magnesium top by ForeverspinTM weighs merely 6g. a) Write the weight of this top in…

A: The question is based on mole concept. We have to determine number of particles present in 6 gram of…

Q: A sample of a compound is found to contain 21.82 g of carbon, 9.16 g of hydrogen, 20.42 g of oxygen,…

A: Mass of compound is,

Q: Determine the mass in grams of 6.03 × 10²¹ atoms of carbon. (The mass of one mole of carbon is 12.01…

A: The given mass of 1 mole of carbon atoms = 12.01 g So, the mass of 6.022×1023 atoms of carbon =…

Q: Determine the mass in grams of 7.94 × 10²¹ atoms of zinc. (The mass of one mole of zinc is 65.39 g.)

A: Given : Mass of 1 mole of Zinc = 65.39 g And number of atoms of Zinc = 7.94 X 1021 atoms.

Q: Calculate the number of atoms in a 2.17 x 105 mole sample of neon. Your answer should be rounded to…

A: Number of moles of a substance is equal to the mass of the substance divided by its molar mass.

Q: How many atoms are there in 77.9 g of selenium? You will need to divide your answer by 1.0X10^23

A:

Q: What is the weight in grams of 8.68 x 10^17 CF, molecules? Hint: must use Avogadro's number Put your…

A: NOTE: The chemical formula of the compound given is missing the subscript. It will be CF4 and not…

Q: how many moles of sodium atoms do you have if you have 7.10x10^23 atoms of sodium. (The mass of one…

A: One mole comprises of 6.022×1023 particles.

Q: Tia has a sample of pure gold (Au). She weighed the sample and the result was 22.2 grams. Tia wants…

A: "Since you have asked multiple Qs , I am gonna help you with first one, If you need help with any…

Q: Calculate the mass of gold(III) chloride (Au2Cl6) that contains a million (1.000 x 10^6) chlorine…

A: The atomic mass of Au (gold) is 197 g/mol while the atomic mass of Cl(chlorine) is 35.5 g/mol. Molar…

Q: What is the mass of 2.49 x 1022 of CH4 molecules?  ( 1 mole = 6.02 x 1023)

A: Calculate the number of moles of methane.

Q: e mass of 1.20 x 1024 molecules of CH4 is

A:

Q: Part B How many grams are in 0.290 mole of Cl2 ? Express your answer to three significant figures.…

A: Solution:-  Mass of Cl2 is 35.5+35.5=71 gm

Q: 49.410% potassium, sulfur, and 30.32% oxygen are found to be in a sample found in an unlabeled…

A: The empirical formula of a compound does not give the definite proportions of the element in a…

Q: Potassium is the second most abundant metal in the human body. Calculate the following: (a) The…

A:

Q: What mass of sodium hydroxide has the same number of oxygen atoms as 100.0 g of copper(II)…

A:

Q: What is the mass in grams of 7.70 × 1014 lead (Pb) atoms? × 10 Enter your answer in scientific…

A:

Q: 1. What does the mole measure? a. mass of a substance b. volume of a substance c. density of a…

A:

Q: Calculate the number of grams of lead contain 1.2 x 1024 atoms of lead.

A: Given: lead contain 1.2 x 1024 atoms of lead. To find: Calculate the number of grams of lead contain…

Q: Find the mass of 1 molecule of NH3 in gram. a. 2.82 x1023 b. 17 C. 10 d. 2.82 x1023

A: We know that 1 mol of any substance contains Avogadro's number of molecules or atoms i.e 6.023 ×…

Q: Calculate the number of atoms in 1.02 ×x 10¯º moles of helium. x 10 atoms (Enter your answer in…

A:

Q: 4. One mole is equivalent to a. 3.75 g Hydrogen c. 16 g Oxygen b. 14 g Carbon d. 190 g Gold 5. What…

A: Answer  4 ) one mole is equivalent to        c) 16g  oxygen  1 mol is  equal to 6.022×1023 (…

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: Calculate the number of atoms in a 4.07x 10^ 3 g sample of calcium

A:

Q: Problem attached

A: The given data contains, Amount of CaSO4.2H2O = 0.402 g Molar mass of CaSO4.2H2O= 172.17 g/mol.

Q: Determine the number of atoms in 61.0 grams of calcium, Ca.

A: Given;

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.