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Why is the number of microseconds in a week NOT considered an exact number? Aren't there 10^6 microseconds in a second, 3600 seconds in an hour, 24 hours in a day, and 7 days in a week?
Which of the following is true about ionic bonds?
Balance the following chemical reaction using the lowest integer coefficients, in acidic conditions I?(aq) + BrO3?(aq) ? HIO(aq) + Br?(aq)
The thermal decomposition of 1.6608 grams of MgSO4 x H20 produces 1.4446 grams of a product in a well behaved reaction. There are two possibilites
Consider a substance where the intermolecular forces hold the molecules in fixed rigid positions. What is the process called when enough heat has been added to the substance so that the molecules begin to flow
Calculate the volume in liters of a 0.024 micro M copper (II) sulfate solution that contains 11.0 mol of copper (II) sulfate
Na2SO4 is dissolved in water to make 450.mL of a 0.250 M solution. How many mles of Na2SO4 are needed
Calcium carbonate and sand mixture with weight of 4 grams is reacted with excees of HCl results in the production of carbon dioxide then find out the percent of calcium carbonate in the original mixture?
If a non-cyclic alkane shows a molecular ion peak at m/z 464, what is the chemical formula
Wpump = 1500 kJ/h = 0.42 kW Qboil = 2.59 x 106 kJ/h = 718.7 kW Wturb = -227,300 kJ/h = -63.1 kW Qcond = -2.36 x 106 kJ/h = -656 kW What is the efficiency of the engine? How should we define it?
calculate the molarity of an nh3 solution made up of 37.5 g of nh3 in 70.0 g of water. the density of the solution is
Enter the half-reactions and the balanced cell reaction for the following galvanic cells. (Enter states of matter in your answer.)
Calculate the partial pressure of ozone and the number of ozone molecules per liter of air if the tempreture and pressure were 20.0 degrees C and 758 mmHg, respectively.
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