The number of total electrons of iron is:

a) 55.85

b) 29.85

c) 26

d) 27.78

e) 56

Topsoil is considered to be most fertile when it has a A. low pH level B. low sand content C. high organic matter level D. high parent rock material

Jenny want to determine if a new brand name wahing detergent is better than her old detergent. she washes ten dirty t-shirts with her new washing detergent and ten dirty t-shirts with the old detergent.

Explain the statement "atomic weight or molecular weight is a relative weight"

What structural units make up metallic solids

Which of the following shows a periodic pattern? A. there are two ducks in one pond. B. there is meat next to the cheese in the refrigerator C. a boy waits five minutes to talk to his father D. the mother takes her medication everyday at seven

Suppose 0.274 mol of a gas occupy 6.62 l at a given temperature and pressure. what volume will 0.878 mol occupy at the same temperature and pressure?

Peter and Jessica are both forensic scientists. Peter visits crime scenes to pr the evidence collected by Peter.

1. Mitch weighs out 67 grams of potassium (K) to make a buffer. How many moles of potassium did Dr. Hellman weigh out? 2.

9,000,000 in scientific notation

Ozone layer depletion causes