A pure copper sphere has a radius 0.925 in Part A How many copper atoms does it contain? [The volume of a sphere is (4/3) and the density of copper is 8.96 g/cm³.] N 4.61×1024 atoms

Q: In a lab experiment, 7.64 g of phosphorus reacts with bromine to form 66.77 g of phosphorus…

A: law of constant composition:-  a chemical compound always contains its constituent elements in fixed…

Q: A student started with a sample of Cu of 8.66 grams . After the sample was burned in air, the…

A: The mass of Cu sample = 8.66 grams The mass of sample of Oxide after burning the Cu  ( Cooper oxide…

Q: In today's laboratory you are going to mix elemental copper and elemental sulfur to form a…

A: molar mass of Copper = 63.55 g/mol The relation between the mass of a substance and the number of…

Q: percent

A: CuO  + H2 ------------------ Cu  + H2o  Mm of CuO = 79g No of mole of Cu is = 4.7/79= 0.21mol From…

Q: Sort the molecular compounds in the table into groups with the same empirical chemical formula. .…

A: Here we are required to group the compound which have same empirical formula.

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: 2. Which compound (C12H22011 or NH,CI )contains the most total number of atoms?

A:

Q: Without doing any calculations, determine which sample contains the most atoms.(a) one gram of…

A: Given; The mass of cobalt (Co) = 1 g The mass of carbon (C) = 1 g The mass of lead (Pb) = 1 g The…

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: n your own words, define or explain these termsor symbols: (a) ; (b) particle; (c) isotope; (d) ;(e)…

A: Chemistry is the study of elements and compounds comprised of atoms, molecules or ions. It involves…

Q: If 5.180 g of a pure element contains 4.909×1022 atoms, what is the element? The element is: (Enter…

A: 1 mole = 6.022 x 1023 entitiesMass of 1 mole = molar mass

Q: Describe the formation of solid potassium sulfide (K₂S) fromlarge numbers of potassium and sulfur…

A:

Q: How many atoms of oxygen are in 2.7 moles Mg(NO3)2? Report your answer with the correct number of…

A: The number of oxygen atoms there are = 9.8e24  atoms

Q: The mass of a single nickel atom is 9.75x10-23 grams. How many nickel atoms would there be in 153…

A: Mass of a Ni atom = 9.75 × 10-23 g  Given mass of Ni is   =153 mg *( 10-3 g / 1mg )  = 0.153 g

Q: According to the law of multiple proportions, if 12 g of carbon combine with 16 g of oxygen to form…

A: According to the law of multiple proportion, two atoms combining in different ratios to form…

Q: Based on the following word descriptions,write the formula for each of the indicated substances.a. a…

A: A formula of any compound which represents number of the all types of atoms of that compounds…

Q: atoms

A:

Q: i. C₁7H36 plus oxygen gas j. magnesium metal plus silver nitrate

A: C17H36 (Heptadecane) this is an alkane.  Alkane and O2 react and produce CO2 (carbon dioxide ) and…

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

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

Q: 5) Naturally occurring chlorine that is put in pools is 75.53 percent "Cl (mass = 34.969 amu) and…

A: Total abundance of the element is 100%. Two isotopes are present.Abundance of Isotope Cl-35 = 75.53…

Q: A 2.865 g sample of Iron (III) Chloride hydrate FeCl3∙xH2O was heated at 150°C until a constant mass…

A: GivenMass of FeCl3 .XH2O (Hydrated Sample) = 2.865 gMass of Dehydrated sample =FeCl3  = 1.719 gMolar…

Q: If 6.045 g of a pure element contains 3.991x1022 atoms, what is the element? The element is: (Enter…

A:

Q: 1. State the law of definite proportions (or the law of constant composition). Consult your lecture…

A: Since we only answer one question at a time, we’ll answer the first one. Please resubmit the…

Q: A gold wedding band is 14B, which means it is 58.3% many grams of gdd is in a l6.05g? Guld, Huw band…

A:

Q: Given the following imaginary elements and average atomic masses, calculate the molar mass of the…

A: Given compound is A2DR4given atomic mass of A        19.32D         96.18R         20.20X…

Q: Determine the number of atoms in 81.0 grams of calcium, Ca. (The mass of one mole of calcium is…

A: Atomic weight of any element contains contain Avogadro number of atoms. Here mass of 1 mole of…

Q: The formula for alum has 1 Al. How many units alum could be made from 7 Al atoms? Answer with a…

A: The molecular formula of alum is K2(SO4)·Al2(SO4)3·24H2O or KAl(SO4)2·12H2O

Q: An unknown compound has the following chemical formula: CF where x stands for a whole number.…

A: Recall the formula of the unknown compound is C2Fx Given that the unknown compound contains 6.7 mol…

Q: Given these masses of elements found in a sample of a compound: 15.27 grams Ca, 4.57 grams C, and…

A: Given data :

Q: You have a 20.0 g sample of silver metal. You are given 10.0 g of another metal and told that this…

A: The situation is possible or not has to be determined.

Q: O MATTER Standard chemical and physical states of the elements Write a complete chemical formula,…

A:

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.