In chemical reactions, the substances present at the start of the reaction are called, and the substances produced are called

In which substance would heat transfer by conduction work best

Which scientist proposed the "plum pudding" model of the atom?

What is a semiconductor? A: a substance that completely blocks the flow of electricity B: a comductor that has less conductivity than do metallic conductors C: a conductor that operates only at low temperatures D: a conductor that conducts

The diagram below shows the movement of Earth plates. Which of these features is most likely formed as a result of the movement of Earth plates shown in the diagram? Select one: a. a fault b. a ridge c. a trench

When soap is shaken with water, is a solution, a suspension, or a colloid formed? Explain.

Which of the following is a mixture A aluminum B BaSO3 C Milk D table salt

Which of the following quantum number combinations is not allowed in an atom? A. n = 2, l = 1, mr = - 1 B. n = 1, l = 1, m = 0 C. n = 8, l = 5, m = - 4 D. n = 6, l = 3, m = 2

13. Adding thermal energy to a gas at constant pressure will cause

A 3 ml volume of a solution containing an unknown concentration of hcl is added to 7 ml of water. it is then determined that the concentration of the hcl in the diluted solution is 630 mm. what was the concentration of hcl in the original solution?

How do you find the ph of water