HELP AS SOON AS POSSIBLE PLEASE……Which of the following equations is balanced? (5 points) 1) 2H2 + O2 + 4H20
2) 4Na + O2 -2Na20
3) Fe2O3 + H2 - 2Fe + 3H20
4) CH4 + O2 - CO2 + H20

Heat flow inside earth activity i chose chemistry cause there is no science alert! the newspaper has been hacked, and all of the headlines have been changed to reflect old legends. it is your task to make sure they are corrected. choose one of the newspaper headlines. you will rewrite the headline and a one-to-two-paragraph article to make the news scientifically correct. be sure to include the following in your corrected newspaper article: new title reflecting correct information detailed information about the processes and tectonic plate interactions that are causing the geological event to occur real-world example of where to find the geological event on earth (picture and location) also review the grading rubric before you begin.

Un cierto gas tiene un volumen de 800ml a 80°c y 600ml a 80°c y 600mmhg de presión. ¿cual será el volumen del gas a condiciones normales? sí el gas es oxígeno, ¿cuál será su peso? y ¿cuántas moléculas están presentes en el sistema?

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions