Who was the first person to propose that atoms existed?

A source emits a sound and is represented by the red dot in this map. Four people are located around the source, and the circles represent the sound wave.

According to le chatelier's principle, what would happen if the equilibrium of a weack acid or weak base were upset

Calculate the molarity and molality of 49.0 wt% HF, assuming a density of 1.16 g/mL.

What is thr valency of scadium

The pressure exerted by a phonograph needle on a record is surprisingly large. If the equivalent of 1.00 g is supported by a needle, the tip of which is a circle 0.200 mm in radius, what pressure is exerted on the record in kPa

Name 5 types of alloys

What is the 3 types of matters

A sunflower turns its head toward sunlight. What triggers this behavior in a sunflower? gravity phototropism presence of nutrients presence of water

Enter your answer in the provided box. A sample of an unknown gas effuses in 14.5 min. An equal volume of H2 in the same apparatus under the same conditions effuses in 2.42 min. What is the molar mass of the unknown gas

What volume will 0.710 moles of nitrogen gas occupy at STP?