A box contains a mixture of small copper spheres and small lead spheres that are the same size. The total volume of both metals is measured by the displacement of water to be 411 cm and the total mass is 4.34 kg. The density of copper is 8.96 3 g/cm³, and the density of lead is 11.40 g/cm³

Q: nd contains 12.4g of hydrogen. What is the percent by mass of hydrogen in the compound?

A: Given A 37.1 g sample of an unknown compound contains 12.4g of hydrogen. What is the percent by mass…

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: 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: 5.00 g of copper is reacted with 5.00 g of sulfur in a crucible and acompound composed of copper and…

A: The question is based on the concepts of reaction  Stoichiometry. we know the amount of product…

Q: When a 2.118 grams sample of pure copper is heated in oxygen, the resulting reddish- brown compound…

A: The mass of the copper sample is = 2.118 g The mass of the copper oxide is = 2.385 g The empirical…

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

A: We know that,  1 mole = 6.023 x 10 ^23 molecules. 1mole = molar mass of any compound.

Q: The mass of silver in a 9.000 g of silver chloride,AgCl is ?

A:

Q: carbon

A:

Q: Determine the mass in grams of 5.53 × 1021 atoms of arsenic. (The mass of one mole of arsenic is…

A: Answer:- Firstly using the given number of atoms of arsenic, moles are calculated. Then using the…

Q: If you react 5.2 grams of magnesium metals with 2.3 grams of copper (II) bromide, how many total…

A: Given : Mass of magnesium i.e Mg taken = 5.2 g And mass of copper (II) bromide i.e CuBr2 taken = 2.3…

Q: Convert 2.4 x 1023 atoms Sulfur into grams of Sulfur

A: Introduction : We have to calculate standard enthalpy of formation .

Q: What amount, in moles, does this mass represent?

A: Number of moles = mass/molar mass  Molar mass of methanol is 32.04 g/mol

Q: What is Kc?

A: Interpretation: The information about Kc is to be provided.

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

A:

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: If 7.736 g of a pure element contains 3.825×1022 atoms, what is the element?

A: In chemistry, the molar mass of an element is the mass of one mole of that substance, expressed in…

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: A 13.0-g sample of titanium reacts with oxygen to form 21.6 g of metal oxide. What is the empirical…

A: Given that  Mass of Titanium reacted = 13.0 g  Mass of metal oxide formed = 21.6 g  Empirical…

Q: A thermometer contains 2.5×1021 atoms of mercury. How many grams of mercury are in the thermometer?

A: To find the mass of mercury in the thermometer, you need to know the molar mass of mercury (Hg). The…

Q: How many grams of iron are there in a sample of Fe3O, which has a mass of 8.338 grams?

A: The objective of this question is to find out the amount of iron in a given sample of Fe3O4…

Q: What is the percent by mass of carbon

A: Percent by mass = (mass of C/total mass of compound) × 100%

Q: How many grams of chromium are in 4.45 pounds of Cr2O3? How do I convert pounds to grams?

A: we know that,  1 pound = 453.6 g So. 4.45 pound have  (4.45 × 453.6 )  = 2018 .52 g

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

A:

Q: Convert between moles and numbers of atoms. A sample of lithium contains 2.24x1025 Li atoms. What…

A:

Q: compound M2O3 is 30.06% oxygen, where M is an unknow metal. The element represented by M is?

A:

Q: A 22.55 g sample of alum is heated in an oven to drive off all the water from the solid. Determine…

A: Answer

Q: 2KCIO,(s) 2KCI(s) + 302g) If 17.8 g of potassium chlorate is heated and decomposes, find the mass of…

A:

Q: What percent by mass of iron(II) phosphate is iron?

A: The molecular formula of Iron(II)phosphate is Fe3(PO4)2. Percentage by mass of any component can be…

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…

Q: A 12.5g sample of a hydrate of calcium chloride is found to contain 3.06 g of water. what is the…

A: We have to predict the formula for Calcium hydrate.

Q: How many milligrams are 3.2×1019 atoms of copper?

A:

Q: Calculate the mass of carbon (in grams) in 366 g of acetic acid.

A: Given :-  Mass of acetic acid = 366 g  To calculate :-  Mass of carbon (in grams)

Q: What is the mass of 1.761 × 10^8 mol S? Answer in units of g.

A:

Q: How many moles of calcium do you have if you measure out 19.13 g of calcium? Enter your answer in…

A:

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".