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If you see that the spectrum of light coming from some object is a nice clean emission line spectrum, what do you then know about the object?
If a grain of rice weighs 20.1 mg, how many grains are there in a serving of 45.0 g?
Sodium carbonate is used to neutralize the sulfuric acid spill. How many kilograms of sodium carbonate must be added to neutralize 2.01×103 of sulfuric acid solution?
The liberated hydrogen occupied a volume of 320ml when collected over water at 25 degrees celcius and the pressure of the gas was equalized to the atmospheric pressure of 750mm as in this lab. Calculate the equivalent weight of the metal, M.
A saturated solution of magnesium hydroxide (Mg(OH)2) in equilibrium with undissolved solid is prepared at 25°C. The pH of the solution is 11.03. Calculate the value of the Ksp.
Ethanol (ethyl alcohol) flows through a pipe at 1.00 x 102 g/s with an average velocity of 20.0 cm/s. Use units in the cgs system to solve the following
A sample of gas occupies 10l under a pressure of 1atm. what will be its volume if the pressure is increased to 2atm ? assuming that temperature of the gas sample does not change
In combustion studies of H2 as an alternative fuel, you find evidence that the hydroxyl radical (HO) is formed in flames by the following reaction
What is the pH of a buffer prepared by adding 0.809 mol of the weak acid HA to 0.406 mol of NaA in 2.00L of solution? The dissociation constant of is 5.66*10-7
Zinc sulfide reacts with nitric acid to give zinc sulfate as well as nitric oxide. Compute the mass of zinc required to react with 110mL of 0.15 M nitric acid
Give an example of a biological reaction in which water participates as a reactant and a reaction in which it participates as a product.
Explain which solution has the highest vapor pressure. Require to do calculations as well as note that colligative properties are based on concentration of all solute particles
Estimate the approximate concentration of a typical enzyme and the number of the enzyme molecules inside each cell? Make any reasonable assumption that will help you calculate the numbers
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