Choose the best description of the radial velocity method of locating exoplanets. 1.This method is works well for detecting planets orbiting in close proximity to a star, so the planet can more readily observed passing in front of the star.
2.Planets are timed as they orbit distant stars. The size of the planet can be judged by time duration it takes to transit a star.
3.The orbiting planet causes the star to wobble causing it to appear bluer or more red depending on which direction it moves.

The table describes how some substances were formed substance 19 description formed by boiling pure water formed by combining three hydrogen atoms to every nitrogen atom formed by adding 5 g of sugar to 1 l of water formed by compressing carbon under high pressure based on the given descriptions, which substance is most likely a mixture?

What is a property of a double replacement reaction

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.