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How much heat (in BTU) would be required to heat and vaporize 100 lb of water from 25°C to saturated steam at 1 atm? A
Write the full electronic configuration for Sr, He, Zn, Br
If a compound has a molar mass of 156 g/mol, what is its molecular formula? If a compound has a molar mass of 88 g/mol, what is its molecular formula?
In the reaction PCl3 + Cl2 ---> PCl5, what will happen to the rate (increase, decrease, no effect) when a) the concentration of PCl3 was increased, b) if the concentration of Cl2 were decreased,
Compound when dissolved in 100. g of water produces a solution with a freezing point of -0.325°C. What is the molecular formula of the compound?
If a sample containing 1.00 mL of nitroglycerine (density = 1.592 g/mL) is detonated, how many total moles of gas are produced?
To what volume will the gases expand against a constant pressure of 650 torr if all the energy of combustion is converted into work to push the piston?
Draw electron flow arrows and complete the Lewis structures for the reaction that occurs between an alkene and hydrogen bromide creating species A and B above.
If 100.0 mL of NO (at STP) reacts with 400.0 mL of O2 at STP, calculate the partial pressure of NO2 in the final reaction mixture.
At 760K, 85% of a sample of cyclopropane changes to propane in 79.0min. Calculate the value of the rate constant for this reaction. All isomerization reactions are first-order.
In the reaction A → products, [A] is found to be 0.490 M at t=72.0 s and 0.474 M at t=82.6 s. What is the average rate of the reaction during this time interval (in Ms^-1)?
Calculate the value of Kc for the following reaction at 700 C. Analysis at equilibrium showed that there are 2.50 moles of H2, 1.35 x 10-5 mole of S2 and 8.70 moles of H2S in a 12.0 L flask
A condenser is to be supplied with 0.0095 m3/s of cooling water at 25oC. What diameter of schedule 40 pipe should be recommended for this application using the economic pipe diameter?
The half life of polonium-210 is 138.4 days. How many milligrams of polonium-210 remain after 415.2 days if you start with 2.0 mg of the isotope?
The rate constant for the elementary reaction is 7.1x10^9/M·s at 25°C. 2 NO(g) + O2(g) 2 NO2(g) What is the rate constant for the reverse reaction at the same temperature?
A compound has a molar mass of 100 g/mol and the percent composition of 65.45% C, 5.5% O. Determine the empirical formula and the molecular formula.
Draw the structure for 2-bromo-3-methyl-3-heptanol. Draw the molecule by placing atoms on the grid and connecting them with bonds.
A gas has a volume of 5.80 L at O degrees C. What final temperature in degrees Celsius is needed to cause the volume of the gas to change to 100 L if n (number of moles of gas) and P are not changed
The empirical formula of a substance is BH3 The exper molar mass is 27.67 g/mol. Determine the molecular formula of the compound?
A closed vessel contains water, oil and air at room temp. If the system is synthesized by first adding the water and then layering the oil on the water. Is this system a simple or composite system.&nb
A 381- sample of unknown solution reacts completely with to form 13.1 . What was the concentration of the solution?
What is the lewis structure for Cl4 and predict molecular geometry
A weather balloon holding 22L of gas is released at a pressure of 103kPa and a temp. of 15'c. What is the temp. at 10km, where the pressure is 15kPa and the balloon occupies a volume of 108L?
Which of the following undergoes substitution by the SN2 mechanism at the fastest rate?
Write the complete stepwise mechanism foe the basic hydrolysis of acetamide, shown in the attachment. Show all electron flow with arrows and draw all intermediate structures.