Which of the processes is exothermic?

1. evaporation of alcohol

2. sublimation of iodine

3. solidification of volcanic lava

4. burning of paper

Sludge and water mixture is homogeneous or heterogeneous mixture?

When light is reflected by a mirror, the angel of incidence is always

Perform the following heat calculations. You must show all work and include units on answers. The specific heat capacity of water is 4.184 J/g°C. How much heat is required to heat 500.0 g of water from 50.0°C to 100.°C? A 45.

Using a value of Ksp = 1.8 x 10-2 for the reaction PbCl2 Pb+2 (aq) + 2Cl - (aq). If the value of Ksp was determined to be only 1.2 x 10-2: Too much solid has dissolved. Additional precipitate is forming. The solution is unsaturated.

A brick has dimensions of 15 cm x 6.0 cm x 12cm. What is the volume of the brick in cubic meters? (Recall that 100 cm = 1m)

Complete and balance the molecular equation, including phases, for the reaction of aqueous ammonium bromide, nh4br, and aqueous lead (ii) acetate, pb (c2h3o2) 2.

A magnesium atom has 2 valence electrons in its third shell. Which is a TRUE statement about what happens when it forms an ion? A. It will be an anion. B. It will have more electrons than protons. C.

What scientific discoveries led to changes in Dalton's atomic theory?

What does berkelium react with

Classifying living things