A teacher did an experiment to show the movement of particles in solids, liquids, and gases. The experimental set-up is shown below: A glass box is shown. Small spheres are shown inside the box taking up half of the space in the box. A blow dryer is shown with its mouth fitted inside a circular hole on the middle of the top surface of the glass box.

The dryer speed can be adjusted at low, medium, and high to represent each state of matter. Which combination of the state of matter and the corresponding dryer speed is correct? (5 points)

a
liquid = low; solid = medium; gas = high.

b
solid = low; liquid = medium; gas = high.

c
liquid = low; gas = medium; solid = high.

d
gas = low; liquid = medium; solid = high.

Consider three unlabeled bottles, each contain small pieces of one of the following metals. - magnesium - sodium - silver the following reagents are used for identifying the metals. - pure water - a solution of 1.0 molar hcl - a solution of concentrated hno3 (a) which metal can be easily identified because it is much softer than the other two? describe a chemical test that distinguishes this metal from the other two, using only one of the reagents above. write a balanced chemical equation for the reaction that occurs. (b) one of the other two metals reacts readily with the hcl solution. identify the metal and write the balanced chemical equation for the reaction that occurs when this metal is added to the hcl solution. use the table of standard reduction potentials (attached) to account for the fact that this metal reacts with hcl while the other does not. (c) the one remaining metal reacts with the concentrated hno3 solution. write a balanced chemical equation for the reaction that occurs. (d) the solution obtained in (c) is diluted and a few drops of 1 m hcl is added. describe what would be observed. write a balanced chemical equation for the reaction that occurs.

According to the tide table below what time of day will the highest tide occur? (2 pt) the highest tide will occur at

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?