How does breaking up a solid speed dissolving in a liquid? increases the surface areadecreases the surface areadecreases the pressureincreases the pressure?

Who identified the electron?

What is the function of a plus sign () in a chemical equation?

What is the mass of 1 mole of carbon? A) 6 grams B) 6.02 x 1023 grams C) 18 grams d) 12 grams

How would you separate a mixture of zinc chloride and zinc sulfide

Which statement describes a chemical change? 1. Alcohol evaporates. 2. Water vapor forms snowflakes. 3. Table salt (NaCl) is crushed into powder. 4. Glucose (C6H12O6) and oxygen produce CO2 and H2O.

According to the kinetic-molecular theory, the collision between two ideal gas particles is a result of neither attraction nor repulsion. repulsion from the wall of the container. repulsion from other gas particles.

A plant grows three inches in a month. Why is this a physical change?

In natural convection heat transfer, the parameter is the Choose the right answer a) Nusselt number b) Rayleigh number c) Grashof number d) Lewis number

An insulator: A. Conducts heat well B. Does not conduct heat well C. Is used to heat cold objects D. Is used to cool hot objects

Which of the following choices would have a negative entropy change? A. N2 (g) + 3H2 (g) - >2NH3 (g) B. CaCO3 (s) - > CaO (s) + CO2 (g) C. H2O (s) - > H2O (l) D. Fe2O3 (s) + 3C (s) - > 2Fe (s) + 300 (g)