A sample of Ar occupies 2.31 Lat a pressure of 2.08 torr and a temperature of 13.2 C. How many atoms of Ar are in the sample? Please express your answer in scientific notation to the second decimal place. 12 Canvas doesn't understand r in scientific notation so 1.00z10-12 should be input as 1.00 * 10 Type your answer.

A sample of Ar occupies 2.31 Lat a pressure of 2.08 torr and a temperature of 13.2 C. How many atoms of Ar are in the sample? Please express your answer in scientific notation to the second decimal place. 12 Canvas doesn't understand r in scientific notation so 1.00z10-12 should be input as 1.00 * 10 Type your answer.

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 69CP: You have two distinct gaseous compounds made from element X and element Y. The mass percents are as...

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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.
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58 Magnesium will burn in air to form both Mg3N2 and MgO. What mass of each product would be found if burning a 3.11-g sample of magnesium to completion produces a combined total of 5.09 g of the two products?
Cyclopropane mixed in the proper ratio with oxygen can be used as an anesthetic. At 755 mm Hg and 25C, it has a density of 1.71 g/L. (a) What is the molar mass of cyclopropane? (b) Cyclopropane is made up of 85.7% C and 14.3% H. What is the molecular formula of cyclopropane?
Hydrogen gas is prepared in a lab experiment. In this experiment, 18.00 g of aluminum metal are mixed with 25 mL of HCl (d=1.025g/cm3). After the experiment, there are 12.00 g of aluminum and 30.95 g of a solution made up of water, aluminum ions, and chloride ions. Assuming no loss of products, how many liters of H2 gas are obtained? The density of hydrogen gas at the temperature and pressure of the experiment is 0.0824 g/L.
The main weapon on a military tank is a cannon that fires a blunt projectile specially designed to cause a shock wave when it hits another tank. The projectile fits into a finned casing that improves its accuracy. Calculate the mass of the projectile, assuming it is a cylinder of uranium (density = 19.05 g/cm3) that is 105 mm in diameter and 30 cm in height. The volume of a cylinder is given by the equation V = r2h
The mass of magnesium used in this experiment is critical to determining the moles of hydrogen gas generated. The analytical balances used in Chemistry 1A labs are very sensitive to point that touching materials with your fingers before measuring them can affect the measurements. The balances are sensitive enough to detect dirt and oils from your fingers transferred to the magnesium. Would your experimental value of R increase or decrease if the mass of magnesium measured was artificially high due the touching it with your hands? Increase Decrease
10 11 12 13 14 15 16 17 18 19 The particles in a gas vibrate faster than the particles in a liquid. O True O False 5.
Solid copper(II) chloride forms a hydrate of formula CuCl2 ⋅ xH2O. A student heated a sample of hydrated copper(II) chloride, in order to determine the value of x. The following results were obtained: mass of crucible = 16.221 g mass of crucible and hydrated copper(II) chloride = 18.360 g mass of crucible and anhydrous copper(II) chloride = 17.917 g At. Mass: Cu 63.55 Cl 35.45 H 1.008 O 16.00 1. Calculate percentage of H2O (answer must have 4 sig. fig)
Solid copper(II) chloride forms a hydrate of formula CuCl2 ⋅ xH2O. A student heated a sample of hydrated copper(II) chloride, in order to determine the value of x. The following results were obtained: mass of crucible = 16.221 g mass of crucible and hydrated copper(II) chloride = 18.360 g mass of crucible and anhydrous copper(II) chloride = 17.917 g At. Mass: Cu 63.55 Cl 35.45 H 1.008 O 16.00 1. Calculate the number of moles of anhydrous copper(II) chloride (answer must be expressed to 5 decimal places)
* Intranet - CSUM 101 Chem101 O Post Attendee - Zoom b My Questions | bartleby A app.101edu.co Bders Question 4 of 5 Submit advuuned wo,wth yor ameo e Leturelow in 20min teratof it If molecules of hydrogen, nitrogen, oxygen and chlorine have the same kinetic energy which molecule will be moving the fastest? A) hydrogen B) nitrogen C) охудen D) chlorine E) All molecules will have the same speed. 8:13 AM O Type here to search 11 10/20/2020 ...
If 2.85 L of nitrogen gas and 2.1 L of hydrogen gas were allowed to react, how many liters of ammonia gas could form? Assume all gases are at the same temperature and pressure. Enter to 2 decimal places.