What energy source is used to produce most of the electricity we use today ?

How did planetesmals form planets? a. they broke apart into smaller chunks.b. they collided and stuck together.c. they cooled and pulled ice together.d. they began to rotate.

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

Convert a speed of 201 cm/s to units of inches per minute. also, show the unit analysis by dragging components into the unit‑factor slots.