Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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How much water do you need to add to 243 mL of 3.36 M KCl solution to make a 1.0 M solution? (assume the volume of solvent is the volume of solution)
Round to the hundredths place.
Round all
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- 1. Give reasons why the helium atom is smaller than the cesium atom. 2. A student got a problem wrong. They were asked, “How many grams of MgCl2 (molar mass = 95.21 g/mol) are needed to make 3.16 L of a 0.500 M MgCl2 solution?” The correct answer is 150. but the student got 1.58. What mistake did the student make? 3. To solve the following problem what is the reason you must subtract the vapor pressure of water, 24 torr, from the total pressure, 747 torr in order to solve the problem? “A 500.0-mL sample of H2 gas is collected over water at 298 K and 747 torr. What volume would the dry H2 gas occupy at STP? (Given: the vapor pressure of water at 298K is 24 torr).” By the way, the answer is .436 liters. NOTE: I am not asking you to solve this problem. I am asking the reason for subtracting the vapor pressure. If you simply solve the problem, you will get no points.arrow_forwardA student, Ken, is given a mixture containing two carbonate compounds. The mixture includes MgCO, and (NH, ),CO,. The mixture is 69.14% CO, is by mass. What is the mass percent of MgCO, in the mixture? mass percent of MgCO,: とTOOLS x10 3,438 19 ON A tv MacBook Air DD 80 000 000 F12 F8 F9 F10 F11 F7 ofarrow_forwardIn an alien world, a different periodic table exists. It is organized similar to the periodic table in our world, just smaller. The first group contains the alkali metals, the second group the alkaline earth metals, there are a few transition metals, and then some non-metals. The periodic table is shown below in picture form, and a table is given with molar masses and common ionic charges. Also in the table is a list of common ion groups (similar to carbonate, nitrate, etc. in our world.) Below is a table showing the molar masses and common ionic charges Element Symbol Atomic Number Atomic Mass Common Charge(s) FixedOrVariable Element or Group Name of anion Hydrogen H 0 Jellium J 1 1.28 2 Fixed Element Dogium D 2 2.48 -3 Fixed Element Dogide Gorillium G 3 4.87 -2 Fixed Element Gorillide Monkium M 4 7.27 -1 Fixed Element Monkide Jucium Oj 5 9.39 1 Fixed Element Racium R 6 11.18 2 Fixed Element Romium Ro 7 14.05 -3 Fixed Element Romide Julietium Ju…arrow_forward
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