Evaluate the following chemical equations selecting the correct grouping.  Balanced equations are marked with a T and unbalanced equations are marked with an F. (a)   2Fe(s) + O2 (g) → Fe2O3 (s)(b)  8Fe(s) + 3O2 (g) → 4Fe2O3 (s)(c)   4Fe(s) + 3O2 (g) → 2Fe2O3 (s)(d)  4Fe(s) + 2O2 (g) → 2Fe2O3 (s)

A cart moves along a frictionless surface while attached to a rope that can be pulled. The graph shows that during the time interval 3s – 8s, the cart is moving at an average speed of…

Diffraction is hard to notice when…

Which of the following best describes Pascal’s law?

In the following chemical equation, what does the expression ▵H = 181 kJ indicate?N2 (g) + O2(g) ⇄  2NO(g) ▵H = 181 kJ

Based on the graph, the resistor most likely has a value of…

An aluminum block (mass = 753 g) is pulled horizontally across a flat steel surface. The graph shows the average force applied to the block in order to start moving it, and it shows the average applied force needed to move the block at a slow steady speed. Based upon the graph, the static frictional force is approximately…

A supermarket checkout attendant does __________ amount of work on a can of soup that he pushes 0.600 m horizontally with a force of 5.00 N? 

Walking across a carpet is an example of charge being transferred by…

Solve the following system of equations using Gaussian elimination: 2x+y−2z=−1  3x−3y−z=5 x−2y+3z=6