CH 02
CO2
+ 2 H2O
What needs to be done to balance this equation?
Do nothing (equation is balanced).
Change O2 to 0, on the left side of the equation.
Add coefficient 2 to O2 on the left side of the equation.
Remove coefficient 2 in front of H 20 on the right side of the equation

Ithink it is space that makes up 70 percent

Answeris associated with sunny,dry weather;

Humans have survived and thrived in mexico city by using technology to create greater access to land. when the spanish conquered the aztec capital, tenochtitlan, in the 16th century, they built mexico city by draining the lakes and filling in the lake water to create more arable land for agriculture. this technique of land reclamation has continued to be fundamental to human civilization in mexico city.