How many Grams of C₆H₆ must decompose according to the following chemical equation to transfer 430kj of heat?

C₆H₆ (l) → 3 C₂H₂ (g) ∆H = 630 kj

How many neutrons are present in the atom of a team that has the atomic number of 50 and the mass number of 119?

Which piece of evidence would prove that a reaction is exothermic

What is the number of moles of solute in a. 3 molality solution containing. 10 kg of solvent?

How does pressure affect the solubility of gases?

The earth receives 1.8 ✕ 1014 kj/s of solar energy. what mass of solar material is converted to energy over a 24-h period to provide the daily amount of solar energy to the earth?

how many energy levels (shells) does an atom of oxygen have? How do you know this by looking at the periodic table?

A student needs to use 0.575 moles of sodium chloride in an experiment. How many grams should he mass out?

Which of the following seperation methods is used to seperate plant pigments? Filtration, Chromatography, fractional distillation, simple distillation?

If a fast moving car making a loud noise approaches and moves past the person what will happen as the distance between the two increases?

Which of the following would be an example of a trophic relationship? Select all that apply. photosynthetic plankton respiring oxygen into the ocean small marine life feeding on the algae and plankton that have descended to the ocean floor a