Blog

Elements will fill their first shell with 2 electrons and each shell after that with _____. This can be done through _____ (list one type of chemical bond). Why do elements try to do this?

We are carbon-based life forms. Looking at this periodic table, make a reasonable guess which element could replace carbon or function most similarly to it based upon its valence electrons.

True or false: A hypothesis and a theory are the same thing.

What is the name of the chemical reaction used to make a new bond between two glucose molecules? What would we call this specific covalent bond formed?

A chemical reaction occurs in a beaker and the temperature inside the container goes down.  Is the sign of

A motorist drives north for 90.0 minutes (=1.5 hours) at 80.0 km/h and then stops for 90 minutes (=1.5 hours). She then continues north, traveling 120 km in 1 hour. What is her average speed?

A  soccer ball is kicked from the ground with an initial speed of 20.0 m/s at an upward angle of 50˚. A player 53.0 m away in the direction of the kick starts running to meet the ball at that instant. What must be his average speed if he is to meet the ball just before it hits the ground? Neglect air resistance. (Type a numerical answer without units.)

A  soccer ball is kicked from the ground with an initial speed of 21.0 m/s at an upward angle of 46˚. A player 49.0 m away in the direction of the kick starts running to meet the ball at that instant. What must be his average speed if he is to meet the ball just before it hits the ground? Neglect air resistance. (Type a numerical answer without units.)

What is the difference between a Matrix and a Data Frame?

A nurse is caring for a client who is incontinent of urine and has a stage 1 pressure ulcer on the coccyx.  Which of the following dressings should the nurse plan to apply?