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Consider two different solutions of the same UV-absorbing compound. Upon UV-analysis, Solution B gave an absorbance of 1.5 and Solution A gave an absorbance of 0. 5 at the same wavelength. Solution B is higher in concentration by what ratio (or percentage)?
A 12-gram mixture of methane, CH4, and ethane, C2H6, is completely combusted in oxygen. If the total mass of H2O produced is 23.4 grams, what was the approximate mass of the methane in the original mixture
How many grams of formic acid, HCOOH, must be added to 0.160 L of 0.150 M sodium formate, HCOONa, to yield a buffer solution with a pH of 4.30? Assume no volume change. Ka of HCOOH = 5.0 10-4.
Carbon dioxide gas evolved out from the solution. After the reaction was completed. The solution was back titrated with a NaOH solution (3.05mL, 0.1500M). Write the reaction equation for the reaction of MCO3 and HCl
What does ozone do that oxygen (or any other molecule) do? How? Ozone is created in what is believed to be a two-step process. It is destroyed naturally in one of two pathways. What are those reactions? On Your Own: What is the role of UV in the d..
What is the final concentration of copper in the flask b)what is the uncertainty in the value of the copper concentration?
How many metric tons (t) of oxygen are combined in a sample of pitchblende that contains 2.5 t of uranium? Analysis shows that 84.2 g of pitchblende contains
what is the concentration of an naoh solution that requires 50.0 ml of a 1.25 m h2so4 solution to neutralize 78.0 ml of
magnetite was found to contain 2.5698 g of iron and 0.9816 g oxygen. What is the empirical formula for this oxide of iron?
When 20.0 g of a metal is placed in 9.0 mL of water, the volume increases to 14.5 mL. What is the density of the metal
Carbon dioxide is dissolved in blood to form a mixture of carbonic acid and bicarbonate. Neglecting free CO2 what fraction will be present as carbonic acid?
A sample of water is collected over water at a total pressure of 616.8 mmHg at 300 C. The vapor pressure of water at 300 C is 31.8 mmHg.
The following reactions ZnBr2 (aq) + 2AgNO3 (aq) -->Zn(NO3)2 (aq) + 2AgBr (s) KBr (aq) + AgNo3 (aq) --> AgBr (s) + KNO3 are examples of a. oxidation- reduction reactions b. acid- base reactions c. precipitation reactions d. a and c e. none of thes..
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