If the heat involved in a chemical reaction has a negative sign,

A. heat is lost to the surroundings.

B. heat is gained from the surroundings.

C. no heat is exchanged in the process.

A substance is on its fifth half-life. Which approximates the percentages of radioactive and stable isotopes, respectively? 96.9%; 3.1% 3.1%; 96.9% 12.5%; 87.5% 87.5%; 12.5% Need an answer fast

The ease which an acid or base dissociates in a solution refers to a. strength b. concentration c. saturation d. indicator

Most transition metals lose one electron to form a + 1 cation. True or False?

Is carbon tetrachloride ccl4 an element or compound?

Jackie has two solutions that are 2 percent sulfuric acid and 12 percent sulfuric acid by volume, respectively.

Reaction rates are affected by how often the particles collide true false

A 25 N and 5 N force pull to the right. Friction is 10 N. If the object is 5 kg, find the net force and acceleration.

What properties of matter are intensive independent of their size

What is the density of an object having a mass of 8.0g and a volume of 25cm3

What is a Cilla? (In drawing)