Scientists can determine if oxygen existed in Earth's Archean atmosphere by

What are the atomic number and mass number of the beta particle?

If I have 7.5 L of a gas in a piston at a pressure of 1.75 atm and compress the gas until its volume is 3.7 L, what will the new pressure inside the piston be?

Joseph drives 25miles North in 15 minutes then he drives 40 miles east in 30 minutes, then he uses cruise control option for 1 hour and covers 70 miles on the highway and finally drives 15 miles in 15 minutes. What was his average speed?

Elementary row operations on an augmented matrix never change the the solution set of the associated linear system. True or False?

What is the electron dot diagram for hydrogen?

Did the test solution react with the supernatant from the test tube that had the largest amount of precipitate? what can you infer about the molar ratio of this reaction?

Contrast mixtures with pure substances

A standard cell potential of which value describes a spontaneous redox reaction?

Using the combined gas law, if the volume of a gas at 155kPa changes from 22L to 10L. What is the new pressure if the temperature remains constant?

What is a contributor of global warming? a. aerosol sprays b. carbon dioxide c. acid rain d. garbage