True or false? For most of human history people burned wood for light heat and energy

How many molecules are there in the following 25.0 g H2SO4

When an atom that has no charge loses two electrons, it becomes a: A: positive ion. B: negative ion. C: positive isotope. D: negative isotope.

Suppose that 1.06 g of rubbing alcohol (C3H8O) evaporates from a 72.0 g aluminum block. If the aluminum block is initially at 25 ∘C∘C, what is the final temperature of the block after the evaporation of the alcohol?

What gas makes up 75% of the earths atmosphere?

The what system illuminates sell your waist through the lungs skin and kidneys

The nucleus of an atom holds 4 neutrons and 4 protons, how many electrons does it have

What types of atoms are in nh3 or ammonia how many hydrogen and how many nitrogen

A piece of wood near a fire is at 23°C. It gains 1,160 joules of heat from the fire and reaches a temperature of 42°C. The specific heat capacity of wood is 1.716 joules/gram degree Celsius. What is the mass of the piece of wood? ОА. 16 g OB.

Which of the following is a viable possibility for a liquid particle that loses energy? (select all that apply) the liquid particle may become a gas particle the liquid particle may become a solid particle the liquid particle may become a slower

What is true of the bottom layer of the ocean? Select the two correct answers. A. It has the largest plants. B. It has the lowest salinity. C. It has the greatest density. D. It has the coldest water. E. It has the most sunlight.