Which of the following is an example of a chemical change?

a.

ice melting

b.

pounding gold into a coin

c.

milk souring

d.

a puddle of water evaporating

If the moles and volume of a gas are held constant, dropping the temperature from 40 degrees Celsius to 20 degrees Celsius causes would cause an initial pressure of 3 atmospheres to drop to 1.5 atmospheres. T/F

What features of earth's crust do convergent divergent and transform boundaries form

A bottle contains 475 ml of insulin at a concentration of 20.0 mg/ml. what is the total mass of insulin in the bottle?

According to the periodic table which element most readily accepts electrons?

Which is the correct chemical formula for hydrogen gas? A. H2O B. OH C. H3 D. H2

Which diagram is the correct electron dot diagram for magnesium?

Which statement best describes electrolysis? Electrolysis stores electrons in an aqueous solution. Electrolysis converts chemical energy into electrical energy. Electrolysis separates protons and electrons in an electrolyte.

Why can xenon expand its octet to form compounds but neon can't

What do we call the group of organisms that share the same characteristics?

Oblicz masę azotu w pustym pomieszczeniu o wymiarach podanych na ilustracji gęstość azotu w temperaturze pokojowej wynosi 1,15kg m3 3m, 2,5m, 4m