Which statement best describes a physical change

1. Non contact forces can act at a distance True False 2. Contact forces can act at a distance True False 3. Which of the following are examples of non contact forces? Choose ALL that apply. A. Friction B. Gravitational force C. Magnetic force D.

What causes earth 's plate to move

What are 5 questions that have the answer scicne safety

What is the new pressure of 150 mL of a gas that is compressed to 50 mL when the original pressure was 2.0 atm and the temperature is held constant? 2. A sample of a gas in a rigid container at 30.0°C and 2.00 atm has its temperature increased to 40.

Some atoms are exceptions to the octet rule by having an expanded octet. which characteristic of needed for an atom to have an extended octet

There is inverse relation between pressure and diffusion in liquid phase? •True •False

What do you need in order to do a stoichiometric calculation? (Choose multiple) Balanced Chemical Equation Molar masses of compounds involved The type of reaction taking place Oxidation Numbers

The correct mathematical expression for finding the molar solubility (s) of sn (oh) 2 is:

18. which bond is most polar? H--F H--Cl H--Br H--I

What kind of reaction is ca (s) + h3po4 (aq) ca3 (po4) 2 (s) + h2 (g)