A 1.58 mole sample of a pure unknown substance has a density of 1.87 g/cm3. If the sample occupies a volume of 188. cm3, what is the identity of the substance in the samples? Element Molar Mass Cadmium 112.411 Francium 223.02 Barium 137.327 Terbium 158.925 Molybdenum 95.95 Terbium Molybdenum Cadmium Francium Barium

Q: 4. AB,(aq) + Nz,L(aq) – > NzB(aq) + AL(aq) 5. AZ4(8) + Q2(8) -- > Z,Q(1) + AO½(s) 2 of 2 Law of…

A: According to the law of conservation of mass , mass of the Substance can not be created or…

Q: A sample of chlorine has a mass of 49.4 grams. How many Cl atoms are there in the sample?  atoms…

A: Chlorine mass of  = 49.4gm Calculate the  =  1 - how many cl atom of sample  2 - how many cl2…

Q: What is the mass in grams of 0.375 mole diatomic chlorine?     13.3 g     0.0134 g     2.26 x…

A: Moles of component is defined as ratio of the given mass to the molar mass. The relation for the…

Q: Mass of 1L Substance 810 g 1100 g 1250 g 1040 g Alcohol Ethylene glycol (antifreeze) Glycerin…

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Q: 12. What mass of carbon di a. 0.468 g b. 2.81 g

A: Given reaction,  C6H14 + 13CO2 -------->6CO2 + 7H2O we have to find mass of CO2 produced by 5.50…

Q: Compound X2Z contains 32.2% X by mass. What mass of the compound contains 36.7 g X?

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Q: Given the data below, calculate the mass of copper in the original sample. Mass of original sample…

A: This question can be solved using simple subtraction.

Q: Determine the mol H2O/mol CaSO4 if you have the following data to teo decimal places. Mass of…

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Q: We have 425 cm3 of a material. How many g is it? The material has density of 0.345 g/cm O 68.0 g O…

A: We have to find mass ,volume and density  is given in the question  Volume of the material = 425 cm3…

Q: Sodium reacts with oxygen to produce sodium oxide in a synthesis reaction. A chemist needs to…

A: We can determine the mass of Na to start with by considering the balanced equation.  The reaction…

Q: 19.964 g of zinc (7.133g/mL) is placed in a graduated cylinder containing water, the final volume of…

A:

Q: What is the average mass (in grams) of a single carbon dioxide molecule? (a) 3.8 × 10-26 g (b) 7.31…

A: Molecules are formed when two or more atoms of the same or different atoms combine. These consist of…

Q: Mass of Zn 2.44 g Mass of Cu 0.063 g The mass of Zn and the mass of Cu in a coin are given in the…

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Q: Analysis of a 31.7 g sample of water revealed a mass percent for lead of 3.3%. Calculate the number…

A: Analysis of 31.7 g of water was done and the mass percentage of lead was found to be 3.3%,

Q: About Sampling, tick only the incorrect alternative(s). Choose one or more: A) Identifying the…

A: Analysis are of two types: qualitative analysis and quantitative analysis. Qualitative analysis…

Q: 18/8 stainless steel is made up of 18% (m/m) of chromium and 8% of (m/m) nickel in iron. What mass…

A:

Q: Determine the mass of sulfate in the powder (in grams) if 2.47 g of barium sulfate (BaSO4) formed.…

A: The question is based on the concept of quantitative estimation of sulphate present in the given…

Q: in a pure sample of blue vitriol, the Cu content is 25.45%. what is the percentage of water?

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Q: A student obtained the data below after performing a similar experiment described in this…

A: Mass of hydrated salt = mass of crucible, cover and hydrate - mass of crucible and cover. So, Mass…

Q: A sample of C,H, has 9.28 x 1024 H atoms. How many carbon atoms does the sample contain? number of…

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Q: Cu20(s) -170.7 92.4 CuO(s) -156.1 42.6 Cu(s) 33.2

A:

Q: 2. The picture in the introduction shows that the mass of a crucible and lid was determined to be…

A: Given,  The mass of Crucible and lid = 22.1504 g.  The mass of crucible and lid  and hydrate =…

Q: The concentration of Al3+ ion in a sample of spring water is 24.7 ppm. What mass of Al3+ ion is…

A: 1. Given that : Concentration of Al3+ ion in spring water (in ppm) = 24.7 ppm Density of spring…

Q: 8. magnesium sulfide + nitric acid > Normal: MeS(ag) + 2HNO3(3g) Mg(NO3)2(ag) +H2S(s)

A: Maghesium sulfidet nitric acid → The normal equation can be written asNormal:Mgs (aq)+ 2 HNO3 (aq) →…

Q: You have a sample of soil. Soil is a heterogeneous mixture. You separate the different size…

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Q: You weigh a dry flask, and place a chunk of solid into it, then weigh it again. You then fill the…

A: The volume of the flask not occupied by the solid is needed to be find out.

Q: 4. Fill in the blanks. Acid Ка pKa Methanoic acid, HCOOH Ethanoic acid, CH3COOH Hydrocyanic acid,…

A: Note: As per our guidelines, we are supposed to answer only one question when multiple questions are…

Q: SOLUTE (NONELECTROLYTE) SOLVENT (WATER) Mass (g) MW (g/mol) Density (g/mL) 60 700 200 18 1.5 1.0

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Q: 1. Zn(s) + Ag*(aq) = Zn²+(aq) + Ag(s)

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Q: What is the % by mass of water in your hydrated copper (II) sulphate? Mass of just anhydrous…

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Q: The natural abundances of elements in the human body, expressed as percent by mass, are: oxygen…

A: The given data contains, person weighs =62 kg =62000 g. Natural abundances in mass percent are, O…

Q: A 5.70 g mixture contains both lithium fluoride, LiF, and potassium fluoride, KF. If the mixture…

A: First, let's analyze the given data in the question, Mass of mixture = 5.70 g Mass of fluorine in…

Q: What is the mass in grams of 1.37 x 10^24 atoms of nickel? ______ grams How many nickel atoms are…

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Q: An analytical chemist measures the amount of Elements E and E, in four samples of an unknown…

A: A pure substance will have the same composition of the elements present in it. The percentage of…

Q: Liquid paraffin. 20 mL Zinc oxide . .15 mg Yellow wax, q.s. ad....100 g What is the amount of liquid…

A: The amount of liquid paraffin is 44 g (option b). Hence the correct option is option b.

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Q: Samples of several compounds are decomposed and the masses of their constituent elements are shown…

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Q: About Sampling, tick only the incorrect alternative(s): A) Identifying the nature of a substance…

A: B) A type of error that is known due to procedures that cause a measure to be too large or too small…

Q: What percent by mass of iron(II) phosphate is iron? a.46.9 b.73.2% c.24.3% d.33.7%

A: Determination of percentage of iron in iron(II) phosphate

Q: A drop of water has a volume of 50 uL. How many water molecules does it contain? The density of…

A: Given that,Volume of water = 50 micro L = 0.05mLDensity of water = 1.0 g/mLNow, you calculate the…

Q: Analysis of a 40 g sample of water revealed a mass percent for lead of 3.23%. Calculate the number…

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Q: You weigh a dry flask, and place a chunk of solid into it. then weigh it again. You then fill the…

A:

Q: Carbon tetrachloride was prepared by reacting 23.6 g of carbon disulfide and 47 g of chlorine gas.…

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Q: A sample of a compound has a mass of 41.13g. The sample is found to contain 37.28g of carbon and…

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Q: Mass (in grams) of 1.00×10−2 molof CdS. Express the mass in grams to three significant digits.…

A: The mass in grams is calculated for CdS as shown,

Q: SiO2 (s)+ C(s)Si(s) + CO(9) a. SIO2(s) C(s)- Si(s) + |CO() > b. Liquid silicon tetrachloride is…

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Q: The concentration of sodium chloride in an aqueous solution that is 2.13 M and that has a density of…

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Q: Compound Quantity Density Molecular weight 0.789 Ethanol 2.2 mL g/mL 46.07 g/mol 1.049 g/mL Acetic…

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Q: An 8.53 mg sample contains 1.72 mg of phosphorous.  What is the mass percentage of phosphorous in…

A: Given  mass of phosphorous = 1.72 mg mass of compound = 8.53 mg  Formula : mass percentage of…

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".