Why didn't scientists know about atoms for a long time

What would dissolve the best in water a) HCI b) C6H12 C) CCI4 d) Oil

0.052301 km significant figures

Within a period, what happens to the atomic radius as the atomic number increases?

The flame symbol represents which of the following hazards? fire hazard heat hazard electrical hazard explosive hazard

Deep Space 2 was a spacecraft powered by an engine that gave off xenon partides to change velocity. It had a mass of 500 kg. Which expression can be used to find the spacecraft's acceleration if its engine created a net force of 0.10 N? 0.

What are small round structures in the cell that breaks down large food particles into smaller ones

A balloon has a volume of 2.5 L and contains 0.100 moles of Helium. Another balloon has a volume of 5.0 L. They are at the same temperature and pressure. How many moles of gas does the second balloon contain?

Why is it important to that the solid be dry before the final mass measurement?

What is 0.00055030 in Scientific form?

What happened to the rate of the forward reaction and the rate of the reverse reaction as time progresses. Describe the rates when the reacion reaches equilibrum.