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How many mL of 5M NaCl are required to prepare 1500 mL of 0.002 M NaCl? What would be the concentration of the diluted solution from Problem expressed in mM, ?M, and nM? A solution contains 15 g of CaCl2 in a total volume of 190 mL. Express the concentration in terms of g/L, % w/v, M, and mM.
A strip of electrolytically pure copper weighing 3.178 gram is strongly heated in a stream of oxygen until it is all converted to a black oxide. The resultant black powder weighs 3.978 g. What is the formula of the oxide?
a sample of gas occupies 12 liters under a pressure of 1.2 atm. what would its volume if the pressure were increased to 2.4 atm? assume the the temperature of the gas does not change.
Find either the wood oak or pine if The given density of oak = 0.9 g/cm 3 , the density of pine = 0.4g/cm 3 .
If doing by hand, please write dark onpaper before scanning. Balance and do total net ionic equations
Draw a structure showing four water molecules bonded to a central water molecule by means of hydrogen bonding. Explain why the pressure of the atmosphere decreases with increasing altitude
Calculate the number of moles of Ascobic acid in the 50.00 ml Sample. Titration Volumes of KIO3 Initial Buret reading/ml trial 1=12.54 trial 2=8.78 Final buret reading/ trial 1=38.74 trial 2=34.93 Volume of KIO used/ml trial 1=? trial 2=?
What is the simplest formula for Chalcocite if a sample of this ore contains 8.274 g copper and 2.088 g sulfur?
how many moles of gas are there in a 45.0 l container at 25.0 degress celcius and 500.0 mm hg
Zn (s) + 2 HCl (aq) = H2 (g) + ZnCl2 (aq) If 1.26 L of H2 gas are formed at STP, how many g of HCl reacted
Following a terrorist release of Cesium-137 (half-life of 30 years) in downtown, clean up efforts were successful in removing all but 100 curies. How long will it take for the contamination to decay to about 5 curies?
Dilute solutions of sodium chloride(NaCl), Sodium sulfate(Na 2 SO 4 ), and Sodium sulfide (Na2S) are available to separate the positive ions from each other., in which order the solutions should be added In order to effect separation?
If a sample of 6.022 g of CH4 is enclosed in a 30 L container at 402 K. What is its pressure in atmospheres?The volume is reduced to 12 L at constant temperature. What is the new pressure in atmospheres.
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