If the half-life of a radioactive substance is 2 seconds, how much of a 100-gram sample would be left after 8 seconds?

What is the name of the scientist who discovered that atoms have positive charges

Time and concentration data were collected for the reaction A ⟶ products A⟶products t (s) [A] (M) 0 0.52 0.52 20 0.43 0.43 40 0.35 0.35 60 0.29 0.29 80 0.23 0.23 100 0.19 0.19 The blue curve is the plot of the data.

Valence electrons are important because these are the only electrons involved with an atom's A. charge. B. nuclear behavior. C. chemical reactivity. D. radioactive properties.

What could account for less than 100 percent yield of co2 from your chemical reaction?

Why is the manatee classified as an herbivore?

Is the following equation balanced? 2Na + 2H2O = 2NaOH + H2 Yes No

What is the difference between a molecule and a formula unit

Sound is not part of a electromagnetic spectrum because A: Sound is not a type of energy wave B: Sound is not a type of electromagnetic radiation C: Sound does not have a wavelength D: Sound does not have a frequency

Arrange the following in order of increasing bond strength of the carbon oxygen bond: Carbon monoxide < carbonate ion < carbon dioxide carbonate ion < carbon dioxide < carbon monoxide Carbon dioxide < carbon monoxide < carbonate ion Carbon monoxide

Which substance is the most soluble at 28°C?