The arrows in the chart below represent phase transitions. Which arrows represent the phase transitions in which heat energy is gained? A. 1, 2, 3 B. 2, 3, 5 C. 3, 4, 5 D. 4, 5, 6

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?

What is the typical rotational frequency frot for a molecule like n2 at room temperature (25∘c)? assume that d for this molecule is 1å=10−10m. take the total mass of an n2 molecule to be mn2=4.65×10−26kg. you will need to account for rotations around two axes (not just one) to find the correct frequency. express frot numerically in hertz, to three significant figures.