Average atomic mass of m
When M2S3 is heated in air, it is converted to MO2. A 4.000g sample of M2S3 shows a decrease in mass of .277 g when it is heated in air. What is the average atomic mass of M?
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What is the total pressure in of the mixture after it is placed in a container one-half the volume of the original container? (Temperature remains constant.)
When balancing the equation using half reactions why is the half reaction of the reduction of the chromate ion written Cr2O7---->Cr3+ instead of Cr2O7---->Cr2O4 How would I write the final balanced equation including the spectator ions?
PCl3(g) + Cl2(g) PCl5(g) is 49 at 230°C. If 0.70 mol of PCl3 is added to 0.70 mol of Cl2 in a 1.00-L reaction vessel at 230°C, what is the concentration of PCl3 when equilibrium has been established?
How long would it take to count 1 billion tiny, invisible objects from a bottle of these objects if you couldnt even see one with an optical microscope but knew that each one weighed 0.00000001 gram?
Briefly discuss interpretations of your observations and results. Discuss how your observations illustrated LeChatelier's principle.
Nitric oxide, NO, is made from the oxidation of NH3, and the reactions is represented by the following equation 4NH3+5O2 --> 4NO + 6H20 What mass of No can be produced from 8.61 grams of NH3?
What is the molality of a solution that contains 3.0g urea (molecular weight = 60 amu) in 100g of benzene?
When 2.45 g of an unknown weak acid HA with a molar mass of 85.0g /mol is dissolved in 250.0g of water, the freezing point of the resulting solution is -0.256 C. Find Ka of unknown weak acid.
N2(g) + 3H2(g) ---->2NH3(g) is 1.7x 10^2. Is the reaction mixture at equllibrium? If not, what is the direction of the net reaction?
Calculate the work done in joules when 50.4 g tin is dissolved in excess acid at 1.04 atm and 20 degrees celsius. assume ideal gas behavior.
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Identify any current advertisement for alcohol or another drug. Which group or groups is it targeting? What message do you think could used to counter this ad?
What is the difference between administrative and biomedical ethical issues? (2 paragraphs-including in-text citations and references)
What moral and ethical questions are raised by the North's decision to wage a hard war against the South and William T. Sherman's conduct
Why was the Church resistant to change? What was the Council of Trent? What was its purpose? What results did the Council of Trent produce?
Describe the following programs with regard to Food Assistance for Low-Income Individuals. a. Supplemental Nutrition Assistance
What are some of the cultural barriers you might encounter when you are completing screenings and assessments?
It is true there are more voters in the northern part of the state. But that shouldn't allow the north to dictate to the south.