Kiera

 In the camel Camelus bactrianus, chromosome 1 and 2 have the following sequences, where * represents the centromere: 

Chromosome 1: a-*-b-c-d-e-f 

Chromosome 2: 1-2-3-4-*-5-6 

Suppose a reciprocal translocation is formed when breaks occur between the d & e loci on chromosome 1, and between the 2 & 3 loci on chromosome 2. Draw the translocation cross that would occur at metaphase 1 of meiosis.

If a diploid species of 2n=10 hybridizes with one of 2n=12 and the resulting hybrid doubles its chromosome number to produce a new fertile allotetraploid species, how many chromosomes will it have (i.e. 2n = 4x = ?).

Draw a meiotic tetrad for a pericentric inversion heterozygote where 4 out of the 6 loci are inverted. 

(Example: Male, double trisomic 13, 18 =         48, XY, +13, +18 ) 

Female, nullisomic 5 =     ______________ 

Female, translocation of part of 

the short arm of 4 to the long arm of 7 =   ______________ 

Male, deletion on the long arm of 22 =   ______________ 

a solution that is 0.195 molL−1 in CH3NH2 and 0.135 molL−1 in CH3NH3Br

Express your answer using two decimal places.

For the best system, calculate the ratio of the masses of the buffer components required to make the buffer. (Kb(NH3)=1.76×10−5.)

Express your answer using two significant figures.

a) BaSO4 (Ksp = 1.07×10−10)

b) Ag2CrO4 (Ksp = 1.12×10−12)

c) Ca(OH)2 (Ksp = 4.68×10−6)

A buffer is created by combining 160.0 mL of 0.25 molL−1 HCOOH (Ka=1.8×10−4) with 75.0 mL of 0.25 molL−1 NaOH.

1) How much anthracene (MW= 178.23 g/mol) would need to be added to 100.0g of cyclohexane (Kfp= 20.4 degrees C/m) to depress the melting point by 5.50 degrees C? Anthracene is a non-electrolyte.

2) A solution with 8.35g of a non-electrolyte solute in 50.0g naphthalene (Kfp= 6.90 degrees C/m) freezes at 76.5 degrees C. Pure naphthalene freezes at 81.0 degrees C. What is the molar mass of the solute?

3) If 0.725g of calcium nitrate was added to 4.25g of water (Kfp= 1.86 degrees C/m), what would you expect the freezing point of that solution to be?

If you could show how you've done it, that would be incredibly helpful. I'm stuck and genuinely don't know how to do this.

Thank you in advance !!

balanced chemical equation:

2C2H18(g) + 25O2(g) --> 16CO2(g) + 18H2O (g)

Thank you in advance!

A beer has an alcohol (ethanol) content that is equivalent to 1.54M. If a bottle is 341 mL, what would be the mass and volume of alcohol in that bottle?

Thank you in advance!

Suppose you dissolve 1.00g of calcium chloride in 500.0mL of water. You then take 5.00mL of that solution and dilute it to 25.0mL. What is the molar concentration of the final solution?

Determine whether a bond between each of the following pairs of atoms would be pure covalent, polar covalent, or ionic.

1) N and Se

2) N and N

3) Ca and F

4) C and O

Rubidium iodide has a lattice energy of -617 kJ⋅mol−1, while potassium bromide has a lattice energy of -671 kJ⋅mol−1.

Use the following terms to fill in the blanks of the sentences below...

potassium

below

less more

get much closer to each other then

bromine

smaller

larger

above

do not release as much

release much more

cannot get as close to each other as

iodine

1. Rubidium is _____  _______ on the periodic table and is below _____  on the periodic table.

2. Therefore, both the rubidium ion and the iodide ion are ______  than the potassium ion and the bromide ion.

3. So, the rubidium ion and the iodide ion ______ the potassium ion and the bromide ion, therefore, they ______ energy and the lattice energy of potassium bromide is ______   exothermic.

Thank you in advance, we haven't learned this yet and it's due tomorrow :(

Arrange the following isoelectronic series in order of decreasing radius: F−, N3−, O2−, Mg2+, Na+.

The ions Mg2+ and Al3+ are isoelectronic. The ionization energies for these two ions are 7730kJmol−1 and 11600kJmol−1, respectively.

Determine the energy of 1.60 mol of photons for each of the following kinds of light. (Assume three significant figures.)

a) infrared radiation (1520 nm )

b) visible light (500 nm )

c) ultraviolet radiation (135 nm )

Please show how you did it, I have no idea how to do this lol

The heat of fusion of ice is 6.00 kJmol−1. Find the number of photons of wavelength 5.58×10−6 m that must be absorbed to melt 1.70 g of ice.

Express your answer using three significant figures.

a) 0

b) 1

c) 2

d) 3