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Questions (39)

The solubility of the fictitious compound, administratium fluoride (AdF3) in water is 3.091×10−4 M. Calculate the value of
1. 2 answers
2. 680 views
Calculate the density of atoms in (001) in lithium (Li).Express your answer in units of atoms/cm2. incorrect
1. 1 answer
2. 452 views
I toss a coin 4 times. Find the chance of getting the sequence HTHT
1. 2 answers
2. 1,298 views
A fair die is rolled three times. Find the chance that three different faces appear.
1. 1 answer
2. 657 views
Please mark below all of the statments that correctly describe the physical properties of glass.Glasses do not have slip
1. 3 answers
2. 618 views
Consider two glasses. Glass A has a composition of 5% CaO - 95% B2O3. Glass B has a composition of 15% CaO - 85% B2O3. Both
1. 1 answer
2. 1,209 views
Which of the following statements describes why ion exchange of 99% SiO2 - 1% B2O3 in a salt bath of molten postassium chloride
1. 1 answer
2. 675 views
A glass of composition 85% SiO2 - 15% K2O is to be surface strengthened by ion exchange. To this end, two identical specimens
1. 4 answers
2. 685 views
Which of these processes will lower the glass transition temperature of a glass? Increase the cooling rate, Decrease the cooling
1. 2 answers
2. 660 views
Determine the radius of the largest atom that can be accommodated in the interstices of BCC iron (Fe) without stress. (Hint: the
1. 1 answer
2. 636 views
Determine the radius of the largest atom that can be accommodated in the interstices of BCC iron (Fe) without stress. (Hint: the
1. 1 answer
2. 535 views
An activationenergy of 2.0 eV is required to form a vacancy in a metal. At 800°C there is one vacancy for every 10-4 atoms. At
1. 1 answer
2. 919 views
Determine the radius of the largest atom that can be accommodated in the interstices of BCC iron (Fe) without stress. (Hint: the
1. 1 answer
2. 603 views
At 10°C below the melting point of aluminum, 0.08% of the atom sites are vacant. At 484°C only 0.01% are vacant. Given this
1. 2 answers
2. 945 views
Calculate the lattice constant in palladium . Use only the information available in the class Periodic Table, and express your
1. 1 answer
2. 463 views
what is the crystal system of the crystal structure of cesium chloride
1. 0 answers
2. 373 views
Gallium nitride is a semiconductor with a bandgap 3.2eV . Calculate the absorption edge of GaN . Express your answer in units of
1. 0 answers
2. 439 views
You wish to make n-type silicon. Select all suitable dopant atoms from the following list:P, B, Mg, Ga, As, In, Sb, Al, Tl, H
1. 0 answers
2. 552 views
Determine the amount (in grams) of boron that when substitutionally incorporated into of silicon will establish a charge carrier
1. 0 answers
2. 431 views
Chemical analysis of a germanium crystal reveals indium at a level of 0.0003091 atomic percent. Assuming that the concentration
1. 1 answer
2. 516 views
Which material would you expect to have a greater bandgap energy between indium nitride and indium phosphide ?
1. 0 answers
2. 381 views
Carbon reacts with chlorine and hydrogen to form the compound CH3Cl.(a) Construct the structure of CH3Cl. What is the dominant
1. 1 answer
2. 736 views
Which of the following combinations of atomic orbitals can combine to form sigma bonds?s-s ,s-p, p-p ,hybrid orbital - hybrid
1. 0 answers
2. 523 views
Rank the following 3 compounds in terms of increasing boiling point: CCl4, CH4, CH2Cl2- Rank the following 3 compounds in terms
1. 1 answer
2. 862 views
Construct the correct structure for AsClF42-.Please construct the molecule such that the dipole is oriented vertically up or
1. 0 answers
2. 609 views
Which of the following combinations of atomic orbitals can combine to form sigma bonds?s-ss-pp-phybrid orbital - hybrid
1. 0 answers
2. 935 views
What is the dominant form of secondary bonding for CH3Cl?Dipole-dipole interactions London dispersion forces Covalent bonding
1. 1 answer
2. 936 views
Carbon reacts with chlorine and hydrogen to form the compound CH3Cl.(a) Construct the structure of CH3Cl.
1. 3 answers
2. 598 views
Construct the correct structure for AsClF42-. You can begin by selecting an option from the menu on the right, then by filling
1. 1 answer
2. 497 views
Use molecular orbital theory to predict whether the bond order in the superoxide ion, O2-, should be higher or lower than the
1. 2 answers
2. 838 views
Calculate the wavelength of a proton with energy 2.45 eV.
1. 1 answer
2. 573 views
Calculate the wavelength of a photon with energy 2.45 eV.
1. 1 answer
2. 722 views
Which atom or ion would you expect to have the smallest radius?Ne F- Na+ Ne-
1. 1 answer
2. 560 views
How many of the following electron configurations are allowed?1s22s22p7 1s22s22p62d1 [Ne]4s24p4 [Ar]3d64s2 1s22s22p83s23p4
1. 1 answer
2. 762 views
Calculate the wavelength, λ, in meters of a photon capable of exciting an electron in from the ground state to n = 4.
1. 1 answer
2. 529 views
Determine the minimum electric potential difference (in volts) that must be applied to accelerate an α-particle so that on
1. 1 answer
2. 563 views
A photon with a wavelength (λ) of 3.091 x 10–7 m strikes an atom of hydrogen. Determine the velocity (in meters/second) of an
1. 1 answer
2. 730 views
How many atoms are in 10.0 cm3 of mercury (at room temperature)?
1. 1 answer
2. 544 views
Calculate the atomic weight (in amu) of an element (X) given the following data: : 24.000 amu at 0.7870 fractional abundance :
1. 1 answer
2. 543 views

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