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if each reactant molecule in the above image represents 0.0157 mol and the reaction yields is 89%, how many grams of Si-containing product form?
Estimate the mean ionic activity coefficient for NaCl in a solution that is 0.020 mol/kg NaCl(aq) and 0.035 mol/kg Ca(NO3)2 (aq)
A metal object with a mass of 19g is heated to 96 degrees C, then transferred to a calorimeter containing 75 g of water at 18 degrees C. What is the specific heat of this metal object.
The system H2(g) + I2(g) ?? 2 HI(g) is at equilibrium at a fixed temperature with a partial pressure of H2 of atm, a partial pressure of I2 of atm, and a partial pres- sure of HI of atm. An addition
Given the reaction: Ca + 2H2O Ca(OH)2 + H2. What is the total number of moles of Ca needed to react completely with 4.0 moles of H2O?
If 18mL of oxygen are collected over water at 27 degrees Celcius and 740 mm Hg of pressure, what volume will the dry gas have at STP? (The vapor pressure of water at 27 degrees celcius is 26.7 mm Hg
A Styrofoam cup containing 200.0 g of water at 55.3C. Calculate the molar heat of vaporization of liquid nitrogen if the final temperature of the water is 41.0C.
A 2.2 g sample of an unknown acid with an empirical formula of C3H4O3 is dissolved in 1 L of water. it requires a 25 mL of .5 M NaOH to completely neutralize the acid. assuming the unknown acid has
Just find the limiting reactant and the excess reactant? give reasons for your choices.
What is the solubility of silver chloride (in g/l) (ksp=1.6x10^10) in a 6.5x10^-3M silver nitrate solution
The student wants to calculate how much dry KHP she must weight out in order to spend approximately 45 mL of the standard in each titration
Discuss the importance of nitrogen source, method of application and timing on availability of added N to crops.
A 75 ml sample of .05 molarity HCN ( Ka= 6.2x10^-10) is titrated with .5 molarity NaOH. What volume of .5 Molarity NaOH is required to reach the equivalence point?
What is the balanced net ionic equation for the reaction below in basic solution? Enter the coefficient for each substance. Do not leave any answer box blank.
How many grams of water are formed when 5.00 g of butanol combust with excess oxygen according to the reaction shown below?
Starting with an aqueous solution of 75mL of 0.35M NaOCl (kb= 2.8x10^-7) determine the observed pH of the solution at the following points in a titration.
Hydrazine (N2H4) is made by the reaction of ammonia (NH3) with hypochlorite (OCl-). Given the following equation 420 kg of ammonia is reacted with excess hypochlorite to generate 315 kg of hydrazin
How many moles of NaOH are contained in the 0.0233 L volume of 0.150 M NaOH that is delivered from the buret?
How many grams of sodium ion Na+ are in 2.50 g toothpaste. A toothpaste contains 0.24 by mass sodium fluoride used to prevent dental caries and 0.30 by mass triclosan , a preservative and antigingiv
Hydrogen peroxide decays into water and oxygen in a first-order process. Please show me the steps to get answer?
Consider the distribution of ideal gas molecules among three bulbs (A, B, and C) of equal volume. For each of the following states, determine the number of ways (W) that the state can be achieved
In the stratosphere, chlorine atoms catalytically destroy ozone (O3) producing the now infamous. Obtain expressions for the steady-state concentrations of Cl and ClO and hence for the rate of change o
Whats the lewis dot structure for H2CCH2? Based on the structure, predict the H-to-C-to-H bond angle. Explain the reason for your prediction. Sketch the model showing the predicted bond.
The formation of SO3 from SO2 and O2 is an intermediate step in themanufacture of sulfuric acid, and it is also responsible for theacid rain phenomenon. The equilibrium constant Kp for the reactioni
An automobile tire has a pressure of 325 kPa when the temperature is 10 degrees celcuis. If the temperature of the tire rises to fifty degrees celcuis and its volume is constant, what is the new pre