For the following measured numbers, the number of significant
figures is indicated in parentheses. which one is incorrect? *
0.00142 (three)
0.0130 (three) 40.04 (two)
400.0 (four)
4x10-2 (one)

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa

Ascientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen, and nitrogen. which term most likely describes what she is measuring?