The principle of conversion of mass is true

a. only for reactions that take place in open systems

b. only for reactions that take place in closed systems

c. for reactions in both open and closed systems

Why do electrons affect the structure of a molecule?

What are isoelctronic species

One meter is equal to 10 9 nanometers. How long in meters is 670 nanometers? 6.70 * 10 - 7 m 6.70 * 10 - 11 m 6.70 * 10 9 m 6.70 * 10 - 9 m

Convert between the Celsius and kelvin temperature scales

Why is the ice in a glacier considered a mineral and the water of a river is not

Which of the following statements about protons are true? Protons have twice the mass of neutrons. Protons have the same magnitude of charge as electrons but are opposite in sign. Protons have a charge of 1+.

What is true of an acidic solution at room temperature?

Why does a higher concentration make a reaction faster? There are more collisions per second and the collisions are of greater energy. Collisions occur with greater energy. There are more collisions per second.

A property of metals is high thermal conductivity which is

Do exorthermic reactions make surrounding hotter?