A tree was chopped down and cut up in a local forest. The tree changed in shape.

Which kind of change took place?

A. change in reaction

B. phase change

C. physical change

D. chemical change

The space shuttle's solid rocket boosters use ammonium perchlorate and aluminum to create an explosive reaction. The unbalanced reaction can be seen below.

Arrange these gases in order of decreasing standard molar entropy: Rank from largest to smallest. Kr, Cl2, SO3

A property of matter will stay the same during a physical change

Which is the correct mole ratio for aluminum chloride to chlorine in the chemical reaction alcl3 br2? albr3 cl2?

A system is a person who is perpiring is. This system endothermic or exothermic

When the isotonic saline solution described in part A is connected to an unknown solution via a semipermeable membrane, the unknown solution level drops.

What is the best estimate and range for 22 20 18 24 21 23

19 How many moles of Cly are produced from 1 mole of CCle.

Which question can be answered using the scientific method? A) Which dog food is best for healthy teeth? B) What color is the most attractive? C) What is my purpose in life? D) Which flower smells the best?

elect all of the true statements regarding chemical equilibrium. The concentrations of reactants and products are equal. The concentrations of reactants and products remain constant. Reactants are being converted to products and vice versa.