Part of the Sun's energy that reaches the Earth's surface is absorbed by land and water as heat. The Earth's surface then releases heat back to the atmosphere. Which of the following is true about this solar energy that is absorbed and released by Earth's surface as heat?

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

The excretory system,need answers for all: )