Which of the following is an endothermic reaction?

a. burning wood

b. an explosion

c. burning a match

d. the cooling of an ice pack

What is the pH of borax solution with a hydroxide ion concentrattion,[OH-], of 1.25*10^-5M

How many valence electrons does sodium have? * Na

The combination of cohesion and adhesion allows plants to draw water up through their roots. This process is called?

What is the molarity of a solution that contains 612 grams of CaCl2 in 3.04 liters of solution? 1.81 M 201 M 5.52 M

What evidence cause thompson to change dalton's solid sphere model into the plum pudding model?

Is the degree of highness or lowness of sound

A student has two substances at a lab table. One substance is iron pyrite (fool's gold) and the other is real gold. After placing a 20.0-gram sample of iron pyrite into 40.0 mL of water in a graduated cylinder, it displaces 4.0 mL of water.

Hydrolysis is an example of which type of reaction?

Which of the following best represents a neutralization reaction

What is borons atomic number