The only sure evidence for a chemical reaction is changes in properties the formation of a gas a color change the production of one or more new substances

Suppose you find a yellow piece of metal in a stream how could you tell it's real gold

True or false? To decrease the concentration of a solution, add more liquid.

Examples of colloids?

Which of the following is TRUE? 1. When the value of Q is large, the equilibrium lies on the product side of the equilibrium reaction. 2.

A 27.40 g sample of liquid mercury is initially at 158.30°C. If the sample is heated at constant pressure ( = 1 atm), kJ of energy are needed to raise the temperature of the sample to 376.20°C. How much energy in kJ is required?

One mole of propane (c3h8) gas reacts with five moles of oxygen (o2) gas to produce three moles of carbon dioxide gas (co2) and four moles of water gas (h2o).

How many nitrogen molecules are in 1.2 moles of N2?

Which best describes how sediment forms?

Detailed explanation of why the sky is blue

Becky leaves home and write a distance of 30 KM it took her 2.5 hours what is her speed