Element X forms three different compounds with element Y. Information about these compounds is contained in the table. Mass of Y per gram Compound Formula of X 2.82 g XY6 1 1.41 g XY2 2 0.94 g XY2 3 What are the formulas of compounds 2 and 3? Replace each question mark with the appropriate integer. compound 3: XY, compound 2: XY, help contact us terms of use privacy policy careers about us P N 99+

Element X forms three different compounds with element Y. Information about these compounds is contained in the table. Mass of Y per gram Compound Formula of X 2.82 g XY6 1 1.41 g XY2 2 0.94 g XY2 3 What are the formulas of compounds 2 and 3? Replace each question mark with the appropriate integer. compound 3: XY, compound 2: XY, help contact us terms of use privacy policy careers about us P N 99+

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter2: Chemical Formulas, Equations, And Reaction Yields

Section: Chapter Questions

Problem 18P: A gaseous binary compound has a vapor density that is 2.53 times that of nitrogen at 100°C and...

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A gaseous binary compound has a vapor density that is 1.94 times that of oxygen at the same temperature and pressure. When 1.39 g of the gas is burned in an excess of oxygen, 1.21 g water is formed, removing all the hydrogen originally present. (a) Estimate the molecular mass of the gaseous compound. (b) How many hydrogen atoms are there in a molecule of the compound? (c) What is the maximum possible value of the atomic mass of the second element in the compound? (d) Are other values possible for the atomic mass of the second element? Use a table of atomic masses to identify the element that best fits the data. (e) What is the molecular formula of the compound?
An element X bas five major isotopes, which are listed below along with their abundances. What is the element? Isotope Percent Natural Abundance Mass (u) 46x 8.00% 45.95232 47x 7.30% 46.951764 48x 73.80% 47.947947 49x 5.50% 48.947841 50x 5.40% 49.944792
You have two distinct gaseous compounds made from element X and element Y. The mass percents are as follows: Compound I: 30.43% X, 69.57% Y Compound II: 63.64% X, 36.36% Y In their natural standard states, element X and element Y exist as gases. (Monatomic? Diatomic? Triatomic? That is for you to determine.) When you react gas X with gas Y to make the products, you get the following data (all at the same pressure and temperature): 1. volume gas X + 2 volumes gas Y2 volumes compound I 2. volumes gas X + 1 volume gas Y2 volumes compound II Assume the simplest possible formulas for reactants and products in the chemical equations above. Then, determine the relative atomic masses of element X and element Y.
Indium oxide contains 4.784 g of indium for every 1.000 g of oxygen. In 1869, when Mendeleev first presented his version of the periodic table, he proposed the formula In2O3 for indium oxide. Before that time it was thought that the formula was InO. What values for the atomic mass of indium are obtained using these two formulas? Assume that oxygen has an atomic mass of 16.00.
A gaseous binary compound has a vapor density that is 2.53 times that of nitrogen at 100°C and atmospheric pressure. When 8.21 g of the gas reacts with AlCl3 at 100°C, 1.62 g gaseous nitrogen is produced, removing all of the nitrogen originally present.(a) Estimate the molecular mass of the gaseous compound.(b) How many nitrogen atoms are there in a molecule ofthe compound?(c) What is the maximum possible value of the atomicmass of the second element?(d) Are other values possible for the atomic mass of thesecond element? Use a table of atomic masses to identify the element that best fits the data.(e) What is the molecular formula of the compound?
(A) if both sentences are true,(B) if both sentences are false,(C) if the first sentence is true but the second is false, and(D) if the first sentence is false but the second is true. 1. When water is mixed with metals, a metal hydroxide is formed and oxygen gas is evolved. The evolution of the oxygen gas from the reaction of metals and water is indicated by the hastened consumption of the splinter. 2. Carbon dating is an application of nuclear chemistry where they use the amount of C-14 in a fossil to determine its age. Nuclear power plants produce radioactive wastes. 3. When water is mixed with oxides, hydrogen gas is evolved. A red to blue color change in the litmus paper indicates that the solution tested is an acid. 4. In the Winkler Titration Method, sodium thiosulfate is standardized against a known concentration of magnesium iodate. The normality (N) of a solution is always equal to its molarity (M). 5. In the experiment on determining the dissolved oxygen concentration of a…
Consider the table. Metal Tm (K) ΔHfus (kJ/mol) Tb (K) ΔHvap (kJ/mol) LiLi 454 2.99 1615 134.7 NaNa 371 2.60 1156 89.6 KK 336 2.33 1033 77.1 RbRb 312 2.34 956 69 CsCs 302 2.10 942 66 Using the data, calculate Δ?fusΔSfus and Δ?vapΔSvap for Cs.Cs. Δ?vap=ΔSvap= JK⋅molJK⋅mol Δ?fus=ΔSfus= JK⋅molJK⋅mol
2.48g of hydrated copper(ii)chloride (CuCl2.xH2O) were heated to constant mass. 1.96g of anhydrous copper(ii)chloride were obtained. determine the value of x in CuCl2.xH2O.(AO2)
The following diagram is a representation of 20 atoms ofa fictitious element, which we will call nevadium (Nv).The red spheres are 293Nv, and the blue spheres are 295Nv.(a) Assuming that this sample is a statistically representativesample of the element, calculate the percent abundanceof each element. (b) If the mass of 293Nv is 293.15 amu andthat of 295Nv is 295.15 amu, what is the atomic weight of Nv?
The following diagram is a representation of 20 atoms ofa fictitious element, which we will call nevadium (Nv).The red spheres are 293Nv, and the blue spheres are 295Nv.(a) Assuming that this sample is a statistically representativesample of the element, calculate the percent abundanceof each element. (b) If the mass of 293Nv is 293.15 amu andthat of 295Nv is 295.15 amu, what is the atomic weight of Nv?[Section 2.4]
Element Kittypurrium (named after one of TA's cats) has two isotopes: Isotope 1 has an atomic weight of 40.005 g/mol and natural abundance of 91.162 %. Isotope 2 has an atomic weight of 43.053 g/mol. What is the average atomic weight for Katypurrium? Enter the value only, do not enter the unit of g/mol.
Suppose there are two known compounds containing the generic elements X and Y. You have a 1.00 g sample of each compound. One sample contains 0.330.33 g of X and the other contains 0.420.42 g of X. Choose all the plausible sets of formulas for these two compounds. O XY and X3Y O X3Y and X4Y O X2Y and X3Y O XY3 and XY4 O X4Y2 and X3Y O XY and X2Y O X2Y3 and X3Y3