The release of heat energy is a common indicator of a chemical reaction true or false

Given the reaction: p4 (l) + 6 cl2 (g) → 4 pcl3 (l) if the percent yield is 82%, what mass of p4 is required to obtain 2.30 g pcl3 (cl2 in excess) ?

How do levels of carbon dioxide in ocean water compare to those of air?

Boron has an atomic mass of 10.811. What does this mean?

A grain of sand is made up of 1.38 * 10-3 grams of oxygen and 0.00122 grams of silicon. What is the total weight, in grams, of the grain of sand?

The Ba (OH) 2 dissociates as Ba^ (+2) + 2 OH^ (-). H2SO4 dissociates as 2 H^ (+) + SO4^ (-2). Write a balanced equation for this reaction.

A chemical reaction involves the rearrangement of atoms to form new molecules. During a chemical reaction, however, atoms are neither created nor destroyed. Which of the following is true about the atoms involved in a chemical reaction? A.

What is the new concentration, after diluting 300 mL of a 1.5 M LiCl solution to 1L

The answer that he gave was wrong

In which orbital does an electron in a bromine atom experience the smallest?

What characteristics of water allow it to have high surface tension?