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Many animals depend on trees and bushes for: a)Shelter, b)Pollination, c)Seed Dispersal, d)Sunlight?
A gas bottle contains .650 mol of gas at .961 atm pressure. If the final pressure is 1.15 atm, how many moles of gas were added to the bottle.
how many grams of gold would plate on the metal used for the medallion? Explain what you are thinking as you show your calculations.
what simple test would you use to identify the possible presence of HCl (aq)? what result do you expect if the solution is HCl (aq)?
How much concentrated solution would you take to prepare 1.25L of 0.120M HNO3 by mixing with water? Nitric acid is usually purchased in a concentrated form that is 70.3% HNO3 by mass and has a density of 1.41 g/mL
The rate constant for decay of 45Ca20 is 4.233x10-3/day. What is the half-life of 45Ca20? a) 81.86 days b) 163.7 days c) 327.4 days d) 409.3 days e) none of these
How can diacetylmorphine be ionised in the blood and what will the effects of this be on the molecule in circulation? (I assume that it will be more soluble?)
A cell composed of a platinum indicator electrode and a silver-silver chloride reference electrode in a solution containing both Fe2 and Fe3 has a cell voltage of 0.731 V.
The distribution coefficient, k = (conc. in hexanes/ conc. in water), between hexanes and water for solute A is 7.5 . What weight of A would be removed from a solution of 10g of A in 100mL of water by a single extraction.
25.0 mL of ethanol (density = 0.789 g/mL) initially at 5.4°C is mixed with 34.6 mL of water (density = 1.0 g/mL) initially at 25.3°C in an insulated beaker. Assuming that no heat is lost, what is the final temperature of the mixture?
How do you who that both ZnS and CuS will precipitate at pH8. 2) Show that only CuS will precipitate when (H3O+) = 0.3M
Ammonium nitrate can decompose explosively when heated according to the equation: 2NH4NO3(s)-------2N2(g) + 4H2O(g) + O2(g) How many liters of gas would be formed at 4500C and 1.00 atm pressure by explosion of 450g of NH4NO3?
A scuba diver with a lung capacity of 5.4 inhales a lungful of air at a depth of 48 and a pressure of 5.8. If the diver were to ascend to the surface (where the pressure is 1.0 ) while holding her breath, to what volume would the air in her lungs ..
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