Which is evidence that a chemical Reagan occurred?

A. A phase change occurs

B. A new gas is observed in the form of bubbles

C. Red and yellow paint mixing to make orange

D. The temperature of the substance remains constant updates

According to the law of conservation of mass, mass cannot be gained or destroyed in a chemical reaction. Why can't you simply add the masses of two reactants to determine the total mass of product?

What is element 115, where did it came from, and what is it used for?

How many copper atoms are in this amount of copper?

How many subunits make up the final quaternary shape of the potassium channel?

Calculate the energy required to heat 406.0mg of cyclohexane from 33.5°C to 38.9°C. Assume the specific heat capacity of cyclohexane under these conditions is 1.85·J·g-1K-1. x Be sure your answer has the correct number of significant digits.

A type of rock that undergoes changes because of heat and pressure

How many milliliters of a 1.25 molar HCL solution would be needed to react completely with 60 g of calcium metal Ca+2HCl - - > CaCl2 + H2

What mass of copper is required to replace silver from 4. oog ogre silver nitrate dissolved in water

What kind of bond would two nonmetals typically make?

Which statement best applies collision theory to preventing a dangerous reaction from occurring? Store the reactants together at a low pressure. Keep all sparks or flames away from the reactants. Store the reactants together at a low temperature.