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Kamila
Questions (27)
what is the simple predicate of Maria its your cousin
1 answer
249 views
Calculate the average mass, in grams, of an iron atom.
0 answers
756 views
If 200 g. of an unknown metal oxide, M2O3, upon reaction with chlorine yields 376 g of M2Cl2, then the metal M is:
a. Indium b.
0 answers
490 views
A solution of sulfuric acid is 50.0% H2SO4 by mass and has a density of 1.15 g/mL. Calculate the molarity of the solution.
1 answer
463 views
An enzyme has one iron atom per molecule and contains .335% iron by mass. Calculate the molar mass of the enzyme
0 answers
455 views
In the n = 5 principal shell, what is the maximum number of electrons that can have m1= -2
1 answer
556 views
The nitrogen-to-hydrogen single bond energy is 389 kJ/mol in NH3. What is the minimum frequency of radiation having the
1 answer
771 views
A hydrogen atom electron in an excited state with n = 7 drops to a lower energy state with n = 3. What is the wavelength of the
1 answer
1,290 views
Determine whether the following reaction is endothermic or exothermic: Mg(g) + 2 F (g)--> Mg 2+(g) + 2 F-
Mg: I1= 738 kJ/mol I2=
1 answer
447 views
In a hydrogen atom, from what energy level must an electron fall to the n=3 level to give a line at 1.28 um (micrometers) in the
1 answer
1,222 views
In a hydrogen atom, form what energy level must an electron fall to the n=3 level to give a line at 1.28 micrometers (um) in the
1 answer
506 views
When light having a wavelength of 497 nm strikes a metal coating of an emitter, an elector with kinetic energy of 2.52 x 10^-19
1 answer
920 views
A laser produced a light of wavelenth 575 nm. How many photons of this light would have to strike a material for the material to
0 answers
466 views
What is the energy and wavelength of a photon with a frequency of 91.5 MHz?
0 answers
521 views
Sodium vapor lamps, used for public lighting, emit yellow light of wavelength 589 nm. How much energy is emitted by 5.00 mg of
0 answers
794 views
The distance between the first and fourth crest of water is 10.9 m. A crest appears every 0.435 minutes, at a point along the
0 answers
485 views
A sample of benzoic acid weighting 1.567 g was burned in a calorimeter. If the initial temperature was 22 degrees Celsius,the
1 answer
561 views
The ΔH for the solution process when solid sodium hydroxide dissolves in water is 44.4 kJ/mol. When a 13.9 g sample of NaOH
2 answers
8,262 views
A container holds 1.00 mol O2, and the pressure in the container is 2.00 atm. A student adds 60.0 g of gas Y to the container.
2 answers
771 views
The root mean square speed of CH4 at 160 K is 5.0x102 m/s. At what temperature will the root mean square speed of C2H6 be the
1 answer
382 views
In a certain process, the internal energy of a system increases 40.7 J and the quantity of work the system does on the
0 answers
419 views
Consider the reaction:
CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(l) ΔH = - 890.3 kJ What volume of CH4(g) at 25°C and 755 Torr will
1 answer
860 views
A system delivers 1275 J of heat while the surroundings perform 855 J of work on the system. Calculate ΔU in J.
0 answers
1,277 views
A gas mixture, has a total pressure of 300. Torr and consists of equal masses of Ne and Ar. What is the partial pressure of Ar,
2 answers
2,841 views
A gas bulb is connected to an open end manometer. The pressure in the bulb is 0.355 Torr more than atmospheric pressure. If the
0 answers
657 views
A 0.167 g sample of Mg(s) is burned in a bomb calorimeter which has a heat capacity of 3081 J/°C. In this process, the
1 answer
599 views
In a Styrofoam cup calorimeter, what is the final temperature when 100. g of iron
at 100. ° C is added to 100. g of water at 20.
1 answer
766 views
Answers (1)
unit 11 lesson 4 do not trast them 1.opininons 2.identify the claim,... 3.the average... 4.a testimony 5.the argument does not ... and no it is not Ariana
