A sample of gold weighs 0.007605 grams.  What’s the number of significant figures of this weight?

Which picture BEST represents a compound? a.        b.     c.   

Some radioactive elements have short-lived isotope(s). Their average atomic masses are not determined, and the mass numbers of their most stable isotopes are listed on the periodic table instead.  Find Am in the periodic table and give the number of neutrons in its most stable isotopic atom.  

What’s the total mass of 100 thallium atoms?

What is the electronic configuration for Ni? a)1s22s22p63s23p64p84s2 b)1s22s22p63s23p63p104s2 c) 1s22s22p63s23p64s23d8 d)) 1s22s22p63s23p64s24p8 e)) 1s22s22p63s23p64s43p5

How many significant figures does 0.000458 have?

Which of the following statements is true of ?

An F2from a cross thought to control by two genes in an epistatic fashion and segregated in a ratio of 158:29:7. Conduct a Chi Square test showing all work and determine if these observed values fit the expected ratio. Describe the type of gene action involved and write possible genotypes of each phenotypic class. (Ch-square is 5.991 at 2 df at 5% level). 

Wheat is a naturally developed allopolyploid and consists of three genomes? What are those three genomes and what are those ancestors of those three genomes? Layout how hexaploid wheat was developed in the nature. 

An F2 population was developed to understand the inheritance of auricle color in barley. The initial understanding was that two genes are controlling the auricle color. The observed F2 ratio was 120: 88 for purple to white auricle color. Conduct a Chi Square test to determine if these observed values fit the expected (Ch-square is 3.84 at 1 df at 5% level).