What is a physical change?

new substance

no new substance

both substances

neither substance

How do you use chemical energy in a sentence

How many molecules are in 0.943 grams of water

At constant pressure, which of these systems do work on the surroundings? 2 A (g) + 2 B (g) ⟶ 3 C (g) 2 A (g) + 2 B (g) ⟶ 5 C (g) A (g) + 2 B (g) ⟶ 2 C (g) A (s) + B (s) ⟶ C (g)

What is an igneous rock

What is a functional group? a group of organic molecules that work together to speed up reactions a group of living things that are made up of organic compounds a group of organs in the body that work together to perform a certain function a group

Which elements are present in sugars?

How does Q compare to Keg? O Q> Keq O Q< Kea OQ = Keg

What is the mass (in grams) of 9.09x10^24 molecules of methanol (CH3OH) ? AND How many moles of N are in 0.183g of N2O?

What are the basic building blocks of matter? A) molecules B) atoms C) electrons D) compounds

How does an atom with too few neutrons relative to protons undergo radioactive decay? * by converting proton to a neutron by converting a neutron to a proton by emitting an alpha particle