What are the basic building blocks of matter?

A elements

B compounds

C mixtures

D solutions

chlorine has an average atomic mass of 35.45 amu. the two naturally occurring isotopes of chlorine are clorine-35 and chlorne - 37 why doesthis idicate that most clorine atoms contain 18 neutrons

Find the density of a rock that has a mass of 18 g and when dropped into 50mL of water, causes the water to rise to the 67mL mark

Which atomic theory involves quantum mechanics? A. the orbital model of the atom B. the nucleus model of the atom C. the billiard ball model of the atom D. the plum pudding model of the atom

In a power plant, coal enters which of these first? the boiler the power lines the turbine the smoke stack

How can the pH of a solution be calculated if the pOH is known? A) by taking the negative logarithm of pOH B) by adding the pOH to 14 C) by raising 10 to the power of - pOH D) by subtracting the pOH from 14

Explain the relationship between the observations and the hypothesis

Be sure to answer all parts. Be sure to report your answer to the correct number of significant figures. Determine Kb of the weak base B whose conjugate acid HB + has Ka 6.6 * 10-4.

Compare and contrast each of the following terms. mass and matter

The rate constant of a reaction is 4.7*10-3 s-1 at 25°C, and the activation energy is 33.6 kJ/mol. What is k at 75°C?

What are the pros of using steel?