Avogadro's number can be defined as a sample of any element weighs a number of grams equal to the average atomic mass of that element and contains 6.022 x 10^23 atoms or one mole of that element. Calculate the mass of 1 mole of silicon atoms.

A)32.19

B) 12.09

C) 14.0 g

D) 28.1 g

In pea plants, the allele for tallness (t) is dominant to the allele for shortness (t). in the cross between a tall pea plant and a short pea plant shown below, what is the probability that the resulting offspring will be tall? whats the percent

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?

Which of the following are correct values for the ideal gas laws constant r