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Get college assignment help at uniessay writers The average concentration of strontium ion in seawater is 8.00 mg of strontium ion per kg of seawater. What is the molarity of the strontium ion if the density of the seawater is 1.025 g/mL.
how much heat in kJ is required to warm 10.0 g of ice, initially at -10.0 celcius, to steam 110.0 degrees celcius?
what mass of CH4 must you burn to emit 265 kJ of heat with the equation CH4(g) 2O2(g)->CO2(g) 2H2O(g)
Calculate the amount of heat transferred when 46.0 g of CH3OH is decomposed by this reaction at constant pressure.
Calculate the amount of work done against an atmospheric pressure of 1.00 atm when 500.0 g of zinc dissolves in excess acid at 30.0°C. Zn(s) 2H (aq) → Zn2 (aq) H2(g)
the complete combustion of 1.043g of C9H8O in a bomb calorimeter( Ccal= 3.986 kj/c) produced an increase in temperature of 12.85C. Calculate the molar enthalpy of combustion of C9H8O, in kJ/mol.
A 25.35g piece of iron and a 27.40g piece of gold at 100C were dropped into 920ml of water at 19.45C. The molar heat capacities of iron and gold are 25.19 J/(mol C) and 25.41 J/(mol C). What is the final temperature of the water and pieces of metal?
Identify all the species which obey the octet rule for every atom. (Central atoms are underlined). (a)ClO3- (b)SO2 (c) NO2 (d)NO2 (e)ClO-
Which of the following statements are FALSE, given the following bond dissociation energies? Assume that bond energies accurately determine heats of reaction. Choose all that are false. BE[H-H] = 436.4 kJ/mol BE[H-N] = 393 kJ/mol BE[H-O] = 460 kJ/mol BE[O=O] = 498.7 kJ/mol a) ΔH°f[H(g)] = 436.4 kJ/mol b) An H-H bond is stronger than an H-O bond. c) ΔH°f[H2O(g)] = -234 kJ/mol d) ΔH°[H2O(g) —> 2 H(g) O(g)] = 920 kJ/mol e) NH(g) H2(g) —> NH2(g) H(g) is an endothermic reaction.
What is the approximate concentration of the solution in {rm mol}/{rm kg}, if 1 {rm mol} of solute particles raises the boiling point of 1 {rm kg} of solvent by 3.63 ^circ {rm C}?
Get college assignment help at uniessay writers Will you answer all the questions from the assignment?
A beaker with 170 of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 . A student adds 5.50ml of a 0.490 M HCl solution to the beaker. How much will the pH change? The of acetic acid is 4.760.
How can catalytic converter reduce carbon monoxide in automobile exhaust?
How do old dispersive infrared (IR) instruments use a grating to separate the infrared source by wavelength before passing through the sample?
What are some of the benefits of usint Fourier Transform Infrared Spectroscopy (FTIR) and how does it measure wavelength without using a grating?
Which of the following statements is true? a. The critical temperature must be reached to change liquid to gas. b. To melt a solid at constant pressure, the temperature must be above the triple point. c. CHF3 can be expected to have a higher boiling point than CHCl3 because CHF3 has hydrogen bonding. d. One metal crystallizes in a body-centered cubic cell and another in a face-centered cubic cell of the same volume. The two atomic radii are related by the factor (1.5)^1/2
There are 13 electrons in the third principal level of this atom. Which of the following could it be? 1. Ni2 2. Mn2 3. Co2− 4. Ge 5. V 6. Cl−
Why might an artist choose to electroplated a sculpture?
Which of the following shows the correct order of decreasing volatility? A) CH4 > CH3Cl > CHBr3 > CBr4 B) CBr4 > CHBr3 > CH3Cl > CH4 C) CBr4 > CHBr3 > CH4 > CH3Cl D) CBr4 > CH4 > CH3Cl > CHBr3 E) CH4 > CBr4 > CHBr3 >CH3Cl
how many grams of solute are present in 575 mL of a 2.00 M solution of HNO3
The temperature outside is -15, and the air pressure is 0.800 . Your neighbor, who released the balloon, tells you that he filled it with 4.10 of gas. What is the volume of gas inside this balloon?
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