Identify element x , y and z and justify your answer compond withD. The compound K2O2 also exists. A chemist can determine the mass of K in asample of known mass that consists of either pure K½O or pure K2O2. From thisinformation, can the chemist answer the question of which compound is in thesample? Justify your answer.No, because Here isn'ra lot of infomation about masses ofースCxy gen and it brings Ho inkymation o mags2. You are given data for three unknown elements next to each other on theperiodic table (let's call them X, Y and Z). You are also told that these elementsare in the 3rd period. (-eY227184177Atomic Radius (pm)1st Ionization Energy (kJ/mol)101112511020a.Identify elements X, Y and Z and justify your answer.X: Ar is the element because of how Igh itis fer atomic radicus34: CI has the second highes for Atomic RaddusZ-S has rol to last Aue the atomic radius.b.You are asked to compare Y's data to the element that is directly above Y in thesame group on the periodic table. Which element would have a higher first ionizationenergy? Explain your reasoning.because ionizationerergyinThe Ar have higher first ionication erne rgygeneral gues lew to high

Answered: Image /qna-images/answer/ae34184e-2d13-4b5c-99e9-9393959bc7f8.jpg

Answered: Y 227 184 177 Atomic Radius (pm) 1st…

Introductory Chemistry: An Active Learning Approach

6th Edition

ISBN:9781305079250

Author:Mark S. Cracolice, Ed Peters

Publisher:Mark S. Cracolice, Ed Peters

Chapter2: Matter And Energy

Section: Chapter Questions

Problem 75E

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Calculate the average density of a single Al-27 atom by assuming that it is a sphere with a radius of 0.143 nm. The masses of a proton, electron, and neutron are 1.67261024g,9.10941028g, and 1.67491024g, respectively. The volume of a sphere is 4r3/3, where r is its radius. Express the answer in grams per cubic centimeter. The density of aluminum is found experimentally to be 2.70 g/cm3. What does that suggest about the packing of aluminum atoms in the metal?
Paracelsus, a sixteenth-century alchemist and healer, adopted as his slogan: The patients are your textbook, the sickbed is your study. Is this view consistent with using the scientific method?
The mole is the SI unit for the amount of a substance. The mass of one mole of pure table sugar is 342.3 grams. How many grams of sugar are in exactly 1/2 mole? What is the mass of 0.764 mole?
Two basic laws of chemistry are the law of conservation of mass and the law of constant composition. Which of these laws (if any) do the following statements illustrate? (a) Lavoisier found that when mercury(ll) oxide, HgO, decomposes, the total mass of mercury (Hg) and oxygen formed equals the mass of mercury(ll) oxide decomposed. (b) Analysis of the calcium carbonate found in the marble mined in Carrara, Italy, and in the stalactites of the Carlsbad Caverns in New Mexico gives the same value for the percentage of calcium in calcium carbonate. (c) Hydrogen occurs as a mixture of two isotopes, one of which is twice as heavy as the other.
The mass of a single vanadium atom is 8.46×10-23 grams. How many vanadium atoms would there be in a sample of vanadium with a volume of 305 cm3 if the density of vanadium is 6.20 g/cm3? I get confused when I'm given info that is already in scientific form. Do I expand them or do I leave it as it is? And I am not sure what form my answer is supposed to be in.
Am I right? Calculate the mass percentage of water in the hydrate. Show the calculations. Sample 1 : 60.87% Mass of hydrate : 0.46g Mas of water : 0.28g Mass percentage of water in the hydrate = 0.28g/0.46g x 100 = 60.87% Sample 1 2 3 Calculations for sample 1 Mass of aluminum dish 1.24g 1.26g 1.24g - Mass of aluminum dish + Epsom salt 1.70g 1.94g 1.80g - Epsom salt, original (hydrated) mass 0.46g 0.68g 0.56g 1.70g – 1.24g = 0.46g Mass of aluminum dish + Epsom salt after heating 1.42g 1.62g 1.61g Epsom salt, heated (dehydrated) mass 0.18g 0.36g 0.37g 1.42g- 1.24g = 0.18g Mass of water 0.28g 0.32g 0.19g 0.46g – 0.18g = 0.28g Moles of magnesium sulfate 0.0015mol 0.0030mol 0.0031mol 0.18g x (1mol/120.37g)= 0.0015mol Moles of water 0.016mol 0.018mol 0.011mol 0.28g x (1mol/18.02g) = 0.016mol Ratio of moles water: moles of magnesium sulfate 32:3 18:3 11:3.1…
A 1.0-g sample of carbon dioxide (CO2) is fully decomposedinto its elements, yielding 0.273 g of carbon and 0.727 g ofoxygen. (a) What is the ratio of the mass of O to C? (b) If asample of a different compound decomposes into 0.429 g ofcarbon and 0.571 g of oxygen, what is its ratio of the mass ofO to C? (c) According to Dalton’s atomic theory, what is theempirical formula of the second compound?
N2H4(1) --> NH3(g)+N2(g) Express your answers as inetegers seperated by commas
Tennessine has two naturally occurring isotopes. Tennessine-293 has an atomic mass of 292.9498 and Tennessine-296 has an atomic mass of 295.9246. Given that the average atomic mass of tennessine is 294.0018, what is the percent abundance of Tennessine-293? (Express as a percentage to two decimal places).
Musical instruments like trumpets and trombones are madefrom an alloy called brass. Brass is composed of copper andzinc atoms and appears homogeneous under an optical microscope.The approximate composition of most brass objectsis a 2:1 ratio of copper to zinc atoms, but the exact ratio variessomewhat from one piece of brass to another. (a) Wouldyou classify brass as an element, a compound, a homogeneousmixture, or a heterogeneous mixture? (b) Would it be correctto say that brass is a solution? [Section 1.2]
Iodine (I) and fluorine (F) form a series of binary compounds with the following compositions:Compound Mass % I Mass % F1 86.979 13.0212 69.007 30.9933 57.191 42.8094 48.829 51.171(a) Compute in each case the mass of fluorine that combines with 1.0000 g iodine.(b) By figuring out small whole-number ratios among thefour answers in part (a), show that these compoundssatisfy the law of multiple proportions.
The seven most abundant ions in seawater make up morethan 99% by mass of the dissolved compounds. They are listedin units of mg ion/kg seawater: chloride 18,980; sodium 10,560;sulfate 2650; magnesium 1270; calcium 400; potassium 380;hydrogen carbonate 140.(a) What is the mass % of each ion in seawater?(b) What percent of the total mass of ions is sodium ion?(c) How does the total mass % of alkaline earth metal ions com-pare with the total mass % of alkali metal ions?(d) Which makes up the larger mass fraction of dissolved com-ponents, anions or cations?

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Y 227 184 177 Atomic Radius (pm) 1st Ionization Energy (kJ/mol) 1011 1251 1020 Identify elements X, Y and Z and justify your answer. X: Ar is the element becauuse of how Ign itis fer atomic radius