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To 0.200 g sample 4.25*10^-3 moles of Hcl were added. This solution was titrated with 2.95*10^-3 moles NaOH. How many moles of HCl consumed by compound? How many moles of NH3 is in sample?
moles NH3 + moles NaOH = moles HCl
Concentrations of flouride in drinking water grerater than 4.0 mg/L can cause mottled teeth in children. What is 4.0 mg/L expressed as molality
Calculate the molarity if 14.5 g of NaOH was dissolved in enough water to give 360 mL of solution.
refrigerators are usually kept at about 5 c while room temperature is about 20 c. if you were to take an empty sealed
Calculate the partial pressure of ozone and the number of ozone molecules per liter of air if the temperature and pressure were 20.0 °C and 758 mmHg, respectively.
a scientist measures the standard enthalpy change for the following reaction to be -889.4 kj 2nh3g 3 n2og 4n2g 3
If the syringe volume had been incorrectly read, giving a calculated system volume of 25.6 mL, what would have been the percent error in the calculated value of R
A 1.00 g sample of enriched water, a mixture of H2O and D2O, reacted completely with Cl2 to give a mixture of HCl and DCl. The HCl and DCl were then dissolved in pure H2O to make a 1.00 L solution
Ozone molecules in the stratosphere absorb much of the harmful radiation from the sun. How many ozone molecules are present in 1.00 L of air under the stratospheric ozone conditions of 227 K temperature and 1.89 * 10^-3 atm pressure
What mass of glucose (180.0 g/m) must be added to 0.50 kg of water to increase the boiling point of the solution by 2.0 degrees C?
A 248 gas sample has a mass of 0.433 g at a pressure of 745 mm Hg and a temperature of 28 C. What is the molar mass of the gas?
CaCN2 + 3H2O -> CaCO3 + 2NH3 . How much NH3 is produced if 187 g of CaCO3 are produced?
Sodium borohydride reacts very slowly with ethanol to evolve a gas. Write a balanced equation for this reaction.
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