An unknown substance undergoes a chemical change that gives off heat. What can you tell me about this substance?

From reading what's hereThat neutrons weigh a bit more than protons Is that bit more about the same as the weigh of an electronAnd if so could it be a positronOr anti-electron

how does matter would cycle through the spheres

At which temperature and pressure would a sample of helium behave most like an ideal gas?

Paleomagnetic evidence was used to confirm which of the following hypotheses? a. hot spot b. transformation boundaries c. seafloor spreading d. subduction

Rubidium and cesium have similar chemical properties because, in the ground state, the atoms of both each have

Below is the lewis structure of the fluoramine nh2f molecule. nfhh count the number of bonding pairs and the number of lone pairs around the left hydrogen atom.

Power is the rate at which energy is?

Convert 1.35 * 1024 atoms of carbon to moles of carbon.

Made from other rock fragments

After the universe was created, what was formed? (Choose all that apply.) Question 3 options: time space matter energy