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What volume of 0.100 M NaOH is needed to react with 11.00 g of potassium hydrogen phthalate, a monoprotic acid with a molecular weight of 132 g/mol?
How much heat is required to convert 25.0g of ethanol at 25 degrees C to the vapor phase at 78 degrees C?
A sample of glucose, C6H12O6, contains 1.265 x 1021 carbon atoms. (a) How many atoms of hydrogen does it contain?
How many grams of water at 0oC could be frozen to ice at 0oC by the evaporation of 493 grams of isopropyl alcohol?
Some people think that driving a car, cooking on an outdoor grill, and using electricity produced by coal-fired generators contribute to global warming. What is the reasoning behind their thinking?
A sample of 0.0020 mole of HCl is dissolved in water to make a2000-mL solution. Calculate the molarity of the HCl solution,the [H3O+], and the pH.
What mass of this substance must evaporate to freeze 185g of water initially at 17 degrees Celsius? (The heat of fusion of water is 334J/g; the specific heat of water is 4.18 J/g-K.)
How many grams of CH4 is needed to produce 49.0 g CHCl3? CH4(g) + 3 Cl2(g)-> CHCl3(g) + 3 HCl(g)
95% wt solution of ethanol in water has density of 0.804gm/mL. Find mass of 1.00L of this solution and the number of grams of ethanol per litre ?
How many moles of NaF must be added to 100.00mL of 0.15 M HF to prepare a buffer with pH=3.30. Ka(HF)=7.1*10^-4
Determine the limiting, excess reagent & percent yield of the reaction - How much excess reagent is left after the reaction reaches completion?
An unknown mass of each of the given substances as with The final temperature is recorded as indicated 1.Pyrex glass (tf=67.6 C), 2.Sand (tf=70.4 C), 3.ethanol (tf=45.9 C), initially at 19.0 degrees celsius, absorbs 1930 Joules of heat
A copper wire (density = 8.96 g/cm3) has a diameter of 0.27 mm. If a sample of this copper wire has a mass of 35 g, how long is the wire?
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