You determine that your sample has a mass of 386 g and a volume of 20ml it also is fairly unreactive to a magnet. What is your rock

Q: How many moles of hafnium contain 6.10 x 10^31 atoms of hafnium?

A: The no. of atoms in hafnium sample = 6.10 x 1031Avogadro’s number is defined as the number of atoms…

Q: How many atoms of silver are in a bracelet that weighs 34.0 g? O 1.1 x 1023 O 1.1 x 106 O 1.9 x 1023…

A: We have to calculate the number of atoms.

Q: A mass of 145 g of a certain element is known to contain approximately 3.64 x1024 atoms. What is the…

A: Let the molecular weight of the element is M gm/mol.  Moles = weight/mol. wt.  Or, moles = 145/M  We…

Q: 1. Calculate the mass in grams of a single oxygen molecule, 02.

A: Molar mass of O2 is 32.0 g/mol  We have to calculate here mass of 1 molecule of oxygen i.e. O2

Q: Calculate the mass in grams of each elemental sample.(a) 1.32 * 1020 uranium atoms(b) 2.55 * 1022…

A: Mole is defined as the ratio of given mass and molar mass. The unit of mole is mol. It is utilized…

Q: Which of the following shows a correct setup? O1.45 mol Ca x- 40 g Ca X1 mol Ca O1.45 mol Ca x Са хт…

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Q: While cleaning your attic, you found your old rock collection. If 83.58% of the rocks have a mass of…

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Q: A certain element X has four isotopes. 0.5600% of Xhas a mass of 83.91343amu. 9.860% of Xhas a mass…

A: Since element X is an isotope. Isotopes are that element which has the same atomic number but has…

Q: Find the mass of 4.5 moles of Zinc (Zn).

A: Given, moles of Zinc (Zn) = 4.5 moles mass of Zinc (Zn) = ? g Note: molar mass of Zinc (Zn) = 65.38…

Q: Determine the number of atoms in 39.0 grams of calcium, Ca. (The mass of one mole of calcium is…

A: Mass of calcium = 39.0 grams Mass of 1 mol of calcium = 40.08 g. Number of atoms = ?

Q: Label Carbon's Periodic Table Symbol ANSWER BANK 6 Mass Number C Average Atomic Mass Atomic 12.011…

A: The periodic table has the number of elements and all these elements have a specific symbol showing…

Q: 4. What is the mass of 7.75 moles of magnesium metal?

A:

Q: A toy top has a mass of 32.0 g Cu. How many atoms Cu are in this spinning top, given that the…

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

A:

Q: 27: What is the mass defect of Be? (Refer to the mases table from the formula sheet) 4

A: Mass defect is define as the disparity in mass of atom to mass of protons, neutrons, and electrons…

Q: A student synthesizes tin oxide to create a compound with generic formula SnxOy. She does this by…

A: Given : mass of product= 39.10 g        Mass of tin = 30.80 g

Q: Q4) consider the element Xy that has an atomic number of 56. If this element has the following data…

A: We are given percentage of natural abundance and mass of its isotopes and we have to calculate it's…

Q: 4. Suppose you have a mixture that weighs 6.00 g. In the mixture you 2.50 g of iron and 3.50 g of…

A: The total weight of mixture is 6.00 g. The mass of iron and sulfur present in mixture is 2.50 g and…

Q: A student has a sample of zinc that weighs 22.19 g How many zinc atoms are in this

A: Given :- mass of Zn = 22.19 g  To be calculated :- number of Zn  atoms  molar mass of Zn = 65.38…

Q: A faraday is      a mole of protons     a charge of one electron     a mole of electrons…

A: One Faraday of electric charge equlas to the charge on a mole of electrons (e-), that is 6.022 x…

Q: a) An element has two naturally occurring isotopes. Isotope l has a mass of 120.9038 u and a…

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Q: Calculate the mass of CBr4 a) 320 g b) 332 g c) 92 g d) none of these

A: Mass of C = 12g/mol  Mass of Br = 80g/mol

Q: Calculate the number of atoms of gold in a cube of gold that is 1.00 cm on each side.

A: We need to find the number of atoms of gold in a cube of gold that is 1.00 cm on each side. We know…

Q: Consider two compounds. Compound A contains 2.77 g of phosphorus and 9.53 g of chlorine. Compound B…

A: Given,Mass of Phosphorus in compound B =11.9gMass of chlorine in compound B =40.9g

Q: 39.5 g of cobalt will combine with 107 g of bromine to form a binary compound. How much of the same…

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Q: Suppose that a person counts out gold atoms at the rate of one each second for the entire span of an…

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Q: Mass of the crucible and cover Mass Difference from previous 34.78166g 134.70516" 34.7658 After 1"…

A: Intrdouction : We have to calculate the mass of magnesium ,oxide and magnesium oxide .

Q: 1. 2 Li, Et,0 2. 0.5 equiv. Cul 3. CH3(CH2)2Br -CI

A: The given reaction is an example of Gilman synthesis. In this reaction, the carbon-carbon bond is…

Q: One atomic mass unit has a mass of 1.6605402 × 10-24 g. a)Calculate the mass, in grams, of one…

A: The mean atomic mass of magnesium stands at 24.305 atomic mass units (amu). An atomic mass…

Q: In 6.9 g of aluminum, there are ______ x 1023 aluminum atoms present

A: Molecular mass of atom contains 6.023 × 10^23 atoms. Molar mass of aluminium is 26.981 g/mol

Q: If 21.4 g of aluminum is reacted with 91.3 g of Fe2O3, the prodücts will be Al2O3 and iron. What…

A: Limiting reagent: In a chemical reaction, the reagent that totally consumed is known as a limiting…

Q: The image shows a representative sample of 50 atoms of a fictious element, called lemonium (Le).…

A: The average atomic mass of an element with three isotopes is given by  Avg atomic mass =…

Q: Analysis of 24.1 g of calcium oxide revealed that it contained 17.2 g of calcium. What mass of this…

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Q: 5) Find the mass of 0.02 moles of K,Cr,O,. 7'

A:

Q: Determine the mass in grams of 7.75 x 1021 atoms of carbon. (The mass of one mole of carbon is 12.01…

A: Given,the mass of one mole of carbon = 12.01 gNumber of carbon atoms = 7.75×1021 atomsHere, we are…