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Question: Pure oxygen was first made by heating mercury (II) oxide: 2HgO --> 2HgO2.
a) How many grams of mercury and how many grams of oxygen are formed from 45.5 g of HgO?
b) How many grams of HgO would you need to obtain 33.3g of oxygen?
The element antimony has an atomic weight of 121.757 amu and only two naturally occuring isotopes. one isotope has an abundance of 57.3 % and an isotopic mass of 120.904 amu based on these data what is the mass of the other isotope.
If a 180 piece of gold (density =19.32 ) is hammered into a sheet measuring 2.51.0 , what is the average thickness of the sheet in meters?
Choose the substance with the highest vapor pressure at a given temperature. sis2, bf3,rbcl, sbh3, ch3sch
How do you estimate energy change using bond reactions in a complete methane combustion
a cook wants to heat 1.89 kg of water from 31.0 c to 100.0 c if he uses the combustion of natural gas which is
The manometer shown below measures the pressure of the water in the tank. Using variables for the densities (no values given), find the gage pressure at point A.
When an aqueous solution of K2CrO4 is mixed with an aqueous solution of AgNO3, a brown precipitate forms. a) Write the balanced molecular equation (including all products and phases) for this reaction.
at a particular temperature k 3.75 for the following reaction.so2g no2g so3g nogif all four gases had initial
What is the value of the equilibrium constant for the reaction between Al(s) and Cd2+(aq), at 25 °C?
A sample of 54.7 g of HCl gas is dissolved to make 1L of solution. What is the molarity of the solution?
calculate the probability of occupying each state when T = 50, 500, and 5000 K. As the temperature continues to increase, the probabilities will reach a limiting value. What is this limiting value
An amount of potassium acid phthalate (KHP) weighs 0.426g (KHP has molar mass of 204.3g/mol and is monoprotic, that is, reacts one-to-one by mole with NaOH) The KHP is dissolved in a small amount of water and titrated with 14.06ml of NaOH. Calcula..
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