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An automobile antilock brake system (ABS) operates the brakes at 30 pulses per second. How many times do the brakes pulse in 1.00 ds?
How many molecules of water are in one drop if there are 3.42×10^22 molecules in 1.00 g (given that 1 mL = 24 drops)? Assume that 1 mL = 24 drops is an exact equivalent and does not affect the number of significant digits in the answer.
Help me understand specifically why the dissociated phosphate ion would prefer to bond with cations like Al and Zn. I think I know why but help me better understand.
The observations listed were made on different solns. Given the observations state which ion studied in this experiment is present. If the test is not definitive, indicate that with a (?).
a 251 mL sample of oxygen is collected over water at 25 deg C and 760 torr pressure. If the vapor pressure of water as 25 deg C is 23.8 torr, what is the pressure of the dry gas alone?
A fossil fuel containing 84% C, 15% H and 1%S is burned with 20% excess air in a boiler. The stack gases are at 150 C. a) What is the concentration (ppm) of SO3 in the stack if equilibrium is established according to
173.3 g of NaCl completely dissolves (producting NA+ and Cl- ions) in 1.00 kg of water at 25.0 degrees celcius. the vapor pressure of pure water at this temperature is 23.8 torr. Determine the vapor pressure of the solution. A)19.3 torr B)23.8 tor..
A solution of methanol, CH3OH, cotains 55.0 grams of methanol in 100. mL of water solution. What is the molarity of methanol in the solution?
Someone is forced to titrate a solution containing 100 mL of .250M sodium acetate with .125 M nitric acid. Calculate the pH of the solution after adding 50.0 mL of the nitric acid.
Why are some covalent bonds polar and others aren't? Understand why the covalent bonds of water are polar and those in the hydrogen molecule (H2) are non-polar.
A certain brand of antacid has a dosage that contain 400 mg Mg(OH)2. How many mmoles of HCl can be neutralized by one dose of this antacid?
A drink sold in a health food store contains 0.300% (w/v) of vitamin C. What would you have to ingest to obtain 1000 mg of vitamin C.
The complete combustion of 1.076g of C9H8O in a bomb calorimeter ( Cccalorimeter=3.895 kJ/ degree C) produced an increase in temperature of 11.21C. Calculate the molar enthalpy of combustion in kJ/mol.
A mercury nanometer contains 2 g of Ar. A burner heats it to P-ext. at 760 torr. What is the Temperature of the gas in the bulb when the total volume is 3 L and H=76mm?
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