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A suspecting wife thinks her husband lied and did not get her a gold ring like he says. She weighs the ring and finds that its mass is 9.56g. She then puts it in a graduated cylinder and finds that it has a volume of .50ml. If the density of gold is 19g/cm^3, is the ring real gold or not? Please show math steps thanks.
Question
Then calculate how many gold atoms there are in the ring, assuming it still has a mass of 9.56g. Show math steps,
positronium consists of an electron and a positron same mass as electron but opposite chargeorbiting around their
Sulfur dioxide gas reacts with oxygen to produce gaseous sulfur dioxide. when the pressure on the reaction at equilibrium is lowered, the equilibrium will
Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 50. cm3. If the combustion of this mixture releases 865 J of energy, to what volume will the gases expand against a constant pressure of 640
Which electrode of a voltaic cell, the cathode or the anode, corresponds to the higher potential energy for the electrons? What are the units for electrical potential? How does this unit relate to energy expressed in joules?
Given the following diagrams at t = 0 min and t = 30 min, what is the half-life of the reaction if it follows first-order kinetics? After four half-life periods for a first-order reaction, what fraction of reactant remains?
When 5 drops of 0.10 M NaOH were added to 20 ml of the buffer in problem 3, the pH went from 3.60 to 3.71. Write a net ionic equation to explain why the pH didn't go up to about 10, as it would have if that amount of NaOH were added to distilled w..
V is the volume, and n is a number that can be 1, 2, 3, ... . Assume that A=1. Determine the work done by the piston. Propose a physical meaning to the term "n" in the above equation.
A mixture of gases contains 5.00 grams of Ne, 5.00 grams of O2, and 5.00 grams of CO2. What is the mole fraction of each gas. What fraction of the total pressure of the gas mix is due to each gas. If the gases are in a 25.0 L container at 25°C, wh..
Using electronegativity values, determine bond polarities and the net dipoles in a molecule of HCN and indicate if the molecule will be polar.
1. prior to placing a 5.158 g piece of metal into the graduated cylinder the level was 5.0 ml. after adding the metal
how many grams of ice would be melted by the energy obtained as 23.4 g of steam is condensed at 100oc and cooled to
The reaction S2O82- + 2 I- ------> 2 SO42- + I2 proceeds slowly in aqueous solution, but can be catalyzed by the Fe+3 ion. Given that Fe+3 can oxidize I- and Fe2+ can reduce S2O82-, write a plausible two-step mechanism for this reaction.
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