Questions LLC
Login
or
Sign Up
Ask a New Question
hershi
Questions and answers by visitors named
hershi
Questions (22)
in a sample of 159,949 first year college students, the national survey of student engagement reported that 39% participated in
2 answers
560 views
Suppose population proportion1 = 0.4, sample size1 = 100, population proportion2 = 0.5, sample size2 = 120.
whats the formula? i
3 answers
377 views
The mass of an individual atom of calcium is 40.08 amu. How many atoms would weigh a total of 15.46 g of this element if the
2 answers
606 views
What is the total molar concentration of ions in 45.26 mL of 0.2068 M K2CO3 (a strong electrolyte)?
1 answer
367 views
What is the the energy (in Joules per photon) of visible radiation that has a wavelength of 6.405e-7 meters? The speed of light
1 answer
393 views
The normal boiling point of Rh is 3727°C. What is its vapor pressure in mm Hg at 2914°C, if its heat of vaporization is 557.0
5 answers
551 views
a solution is prepared by mixing 2.17g of an unknown non-electrolyte with 225.0g of chloroform. The freezing point of the
3 answers
1,456 views
A solution is made by dissolving 7.084 g of aluminum nitrate, Al(NO3)3, in 123.0 g of water. What is the mass percentage of
3 answers
1,178 views
The solubility of Ar in water at 321.9 torr is 0.02538 g/L. What is Henry's Law constant (M/atm) for Ar in water?
1 answer
435 views
Rubidium metal, Rb, crystallizes in a body-centered cubic arrangement. What is the radius of one atom of Rb, if its density is
3 answers
819 views
Determine the rate of consumption of I− if the initial concentration of IO3− was 0.6634 M and decreased to 0.5745 M after
2 answers
722 views
CaO has a face-centered cubic unit cell in which the O2- anions occupy corners and face centers, while the cations fit into the
2 answers
537 views
A certain metal crystallizes in a face-centered cubic arrangement and has a density of a density and atomic radius of 12.41
2 answers
747 views
CaO has a face-centered cubic unit cell in which the O2- anions occupy corners and face centers, while the cations fit into the
1 answer
792 views
What would the [H3O+] be after addition of 5.15 mL of 0.1000 M HCl to 25.00 mL of 0.1000 B (a weak base, Kb = 6.31e-5)?
1 answer
404 views
Which base listed below would be the best to creat a buffer having a pH of 5.0230?
hydrazine, Kb = 8.90e-7 methylamine, Kb =
2 answers
527 views
What would the [OH-] be after addition of 17.47 mL of 0.1000 M NaOH to 25.00 mL of 0.1000 HA (a weak acid, Ka = 3.16e-4)?
1 answer
450 views
Determine the molar solubility of AgBr (Ksp = 5.40e-13) in 2.502 M NH3 if the complex ion [Ag(NH3)2]+ forms with a Kf = 1.70e7
wi
2 answers
655 views
From the reaction below, calculate the free energy of formation for C3H6(g) at 25°C, if ΔGfo(CH4(g)) is -50.790 kJ/mol.
3CH4(g)
4 answers
582 views
What is the free energy change at 25°C for the reaction below, if ΔGfo(CH4(g) = -50.790 kJ/mol, ΔGfo(C7H14(g)) is 95.887
1 answer
448 views
In tomatoes, tall(D) is dominant over dwarf (d) and smooth fruit(P) is dominant over pubescent fruit (p), which is covered with
3 answers
2,878 views
A man marries a woman who is heterozygous for a recessive X-linked lethal gene "X" expressed in very early development. If the
2 answers
663 views
Answers (4)
3(2.02) + 3(12.01) + 6.06 = 48.15 mol products 3(12.01)+ 3(4.04)=48.15 mol reactants Prod-React=0
thank you
oh R is constant.
I don't understand that equation. Which part of what's given would fit into it? T1=3727 T2=2914 then convert to kelvin. delta h is 557.0. but what do i use for R..or is that what i am looking for?
