schoolgirl

This page lists questions and answers that were posted by visitors named schoolgirl.

Questions

The following questions were asked by visitors named schoolgirl.

(f) How much oil will dissolve in the surfactant-water solution if the concentration of surfactant falls in region A?

(b) Calculate the absorption edge of this material. Express your answer as a wavenumber in units of inverse meters.

Calculate the wavelength of a proton with energy 2.45eV. in meter plz

Magnesium can be produced by reaction of magnesium oxide (MgO) with silicon (Si). The by-product of the reaction is magnesium orthosilicate (Mg2SiO4). A reactor is charged with 183.0 kg of MgO and 116.0 kg Si. Assume the reaction goes to completion. Expre...

(a) Consider the gaseous molecule BN-. At home, construct the molecular orbital diagram that is consistent with the known order of filling of molecular orbitals in the second period and with BN- being stable and paramagnetic. What is the bond order of BN-...

Calculate the atomic weight of an element (X) given the following information: 26X: 26.000 amu at 0.1102 fractional abundance 28X: 28.000 amu at 0.6487 fractional abundance 29X: 29.000 amu at 0.2411 fractional abundance What element might the above proble...

Calculate the enthalpy of atomization per unit volume for Rb. Express your answer in kJ/m3. Determine the volume (in mL) occupied at room temperature by 3.5e22 mercury (Hg) atoms in the liquid state.

A particle wavelength (λp) of a proton is 10-12m. What is the velocity of this proton [m/s]? To achieved the velocity that you just computed, what must have been the potential difference (V) through which the proton was accelerated? An electron of wavelen...

Tantalum metal is produced by reaction of potassium heptafluorotantalate (K2TaF7) with elemental sodium (Na) in a reactor heated to 850oC. The by-products are potassium fluoride (KF) and sodium fluoride (NaF). The reactor is charged with 208.0 kg of K2TaF...

Consider an electron in the ground state of hydrogen. (a)What is the least amount of energy needed to excite the ground state electron in Joules? (b) Is an electron in the ground state of hydrogen capable of absorbing a photon with energy of 1.38e-18 Joul...

Answers

The following answers were posted by visitors named schoolgirl.

July 29,2011 i just took thw test and aced it these answers are 100% right thanx for the help. 1.D 2.B 3.B 4.D 5.B 6.B 7.A 8.A 9.A 10.D

Would you please give the formula?

Thanks yoshii but what about a)?

Many thanks. I see now :)

I'll be appreciate if you tell me about b

Here is the full question: (a) Silicon (50 g) has been doped with 27 mg of antimony (Sb). Determine the concentration of free charge carriers (carriers/cm3) at room temperature in this material. Answer for a=6.22*10^18 (b) Calculate the absorption edge of...

Formula please...

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Thanks dear but actually I got the two first ones last night and stuck with part c. :(

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Thank you very much.

Thank you for the help.

Sorry but I couldent make it :(

Muchas gracias mi amigo ;)

Please stop spamming or I have to report you. What's more what I do is none of your concern. Thank you.

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Sorry I meant the last one

I think all of the except E are correct. Any idea?

A) glass B B) glass A

same here... Strange...