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130 mL of an HCl solution with pH of 3.90 is added to 200 mL of an HNO3 solution. The resulting solution is 1.40 mL. What was the pH of the original HNO3 solution?
A 70.6 L constant-volume cylinder containing 7.44 g Hg is heated until the pressure reaches 3.80 atm. What is the final temperature in degrees Celsius?
Calculate the minimum energy that a bird of mass 25 g must expend in order to reach a height of 50 m.
What volume of ethanol must be diluted with water to prepare 308 mL of 0.700 M solution?The density of ethanol is given as 0.789 g/mL.
Assume the Pacific Ocean has a surface area of 1.7 x 108 km2 and an average depth of 3900 m. Calculate the volume of water in the ocean in liters
Determine How hot should be the air in a ballon be heated if it has initially a volume of 750. L at the temperature of 20 degree celsius and the final volume must be 1,000.l
The concentrations of lead in blood samples are often reported in units of micromoles of lead per liter of blood. Calculate the value of the concentration in these units of a blood sample containing 45 ppb lead.
How many grams of are CaH2 needed to generate 147L of H2 gas if the pressure of H2 is 827 torr at 20 C?
A 43.0 g sample of ethylene glycol, HOCH2CH2OH, is dissolved in 540.0 g of water. The vapor pressure of water at 32°C is 35.7 mm Hg. What is the vapor pressure of the water-ethylene glycol solution at 32°C ?
Hydrogen atoms that are bonded to an sp3 hybridized carbon atom normally appear between 0.9 & 1.8 ppm and are said to be shielded
A sediment sample of clay was equilibrated with ammonium ion (NH4+). The ammonium ion was then displaced with Na+. The total amount of ammonium that had been adsorbed.
How much energy would be required to melt 48 g of HCl at its melting point of -110.8C? Hfus for HCl is 14.2 cal/g and Hvap for HCl is 98.7 cal/g.
what is the mass in grams of solid sulfur,S8 required to produce 25.50g of Cu2S(s) according to the balanced equation.
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