Aphoton has 8.0 × 10–15 j of energy. planck’s constant is 6.63 × 10–34 j•s.

If e is the symbol for an element, which two of the following symbols represent isotopes of the same element? 1. e2. e3. ea.1 and 2c.1 and 4b.3 and 4d.2 and 3

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?

How can you write e method for the experiment of separating sand from water by filtration process? 1-materials 2-steps 3-conclusion also the same for the separating process of water and salt by filtration or distillation. quick because i need to finish my hw