Which of the reactions below is a formation reaction? 1. 2 fe(s) + 3 o(g) → fe2o3(s) 2. n2(g) + 2 h2(g) + 1 2 o2(g) → n2h4o(g) 3. b2(s) + 2 i2(ℓ) + cl2(g) → 2 bi2cl(g) 4. cdiamond(s) + 1 2 o2(g) → co(g)?

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons

The diagram below shows the movement of particles. what does this piece of evidence best support? the collision theory the maxwell-boltzmann distribution the effect of pressure on reaction rates the effect of temperature on reaction rates

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.