Which element is a solid at STP and a good conductor of electricity?

(1) iodine (3) nickel

(2) mercury (4) sulfur

How does a sample of helium at 15 °C compare to a sample of helium at 215 K? The helium at 15 °C has a higher average kinetic energy than the sample at 215 K. The helium at 15 °C has lower nuclear energy than the sample at 215 K.

Which best describes heat? energy that is carried by electric and magnetic fields energy that decreases as a car slows to a stop energy that increases as a book is lifted to a higher shelf energy that flows from a hot mug of tea to a cold hand

Identify the precipitate (if any) that forms when Na2S and CdSO4 are mixed. Express your answer as a chemical formula. Enter noreaction if no precipitate is formed.

Think about the lab procedure you just read. Label each factor below with V for variable or C for constant Temperature of the gas: Volume of the gas in the syringe: Weight put on the syringe Number of moles of gas in the syringe: Mass of gas in the

A tank contains 100 gallons of water and 50 oz of salt. water containing a salt solution of concentration 2 + sin t oz/gallon flows into the tank at a rate of 2 gal/min and the well mixed solution drains at the same rate. a.

Why are ionic crystals soluble in water?

What group is more reactive than the alkaline earth metals

You roll a baseball to your little brother A. Static Friction B. Sliding friction C. Rolling friction

What volume of 18.0 M H2SO4 is needed to contain 2.45 moles of H2SO4?

For an experiment, a biology student makes 1 liter of a solution containing the following substances, which are shown in the table below.