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The taste of sour milk is lactic acid. What is the molecular formula for lactic acid if the percent composition is 40.00% C, 6.71% H, 53.29% O, and the approximate molar mass is 90 g/mol?
A solution is prepared by dissolving 4.21 g of a non-electrolyte in 50.0 g of water. If the boiling point raise by 0.203ºC, explain what is the molar mass of the solute? The boiling point elevation constant for water is 0.512 ºC/m.
the concentration of a solution sodium iodide ion will be determined by titrating 90 ml of it using potassium
At saturation, 3.0 x 10-9 moles of AlPO4 have dissolved in 2 L of water. What is Ksp for AlPO4 at this temperature?
Problem- Calculate the molarity of a sodium hydroxide solution if a .5356g sample of KHP was dissolved in 50 ml of water and titrated with 20.78 ml sodium hydroxide to a phenolphthalein endpoint.
Write structures for all the structural isomers of double-bonded compounds with the molecular formula C5H10. Of the compounds
Problem- Butane gas is compressed and used as a liquid fuel in disposable cigarette lighters and lightweight camping stoves. Suppose a lighter contains 6.29 mL of butane (d=0.579g/mL).
Find the heat transferred (in kJ) when 5.50 L of ethylene glycol (d = 1.11 g/mL, see Table 6.2 for c) in a car radiator cools from 37.7°C to 23.0°C.
A crystalline unit cell contains oxygen atoms on all edges of the cell and rhenium atoms on each corner. What is the formula for rhenium oxide
Explain what is the vapor pressure of seawater that has an osmotic pressure of 27.36 atm at T = 30 ° C. Define the pure vapor pressure of water at this
Problem- If the density of ocean water at a depth of 10,000 m is 1.071 g/mL and if 21 g of water at that depth contains 191 mg of potassium chloride, what is the molarity of potassium chloride in the sample
If the absolute temperature of a gas is doubled, what happens to the root-mean-square speed of the molecules?
In the titrating vinegar expirment briefly explain if the following errors would result in high or low expermental determination of the molar concentration of ch3cooh
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