1. You need to make more of the 20 mg/ml X-gal stock, but somebody put an almost empty jar back on the shelf – there is only 9 mg of X-gal left. How many milliliters of water would you add to use the rest of the X-gal powder before buying more? Answer with two decimal places.

Chemistry: Matter and Change

1st Edition

ISBN:9780078746376

Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Chapter1: Introduction To Chemistry

Section: Chapter Questions

Problem 2STP

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Concept explainers

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.

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1. You need to make more of the 20 mg/ml X-gal stock, but somebody put an almost empty jar back on the shelf – there is only 9 mg of X-gal left. How many milliliters of water would you add to use the rest of the X-gal powder before buying more? Answer with two decimal places. 2. You want to make a large quantity of 0.2 M sodium citrate, but there is only 5 g left of the Sodium citrate dihydrate chemical (FW = 294.10 g/mol) on the shelf. What volume (in milliliters) could you make? Answer with two decimal places.

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