Which gas is produced when Mg (s) is added to HCl (aq) ?

O2

H2

Cl2

CO2

Which of the following statements is true? Algae belong to the Plantae kingdom. Bacteria belong to the Protista kingdom. Organisms in the Monera kingdom are prokaryotes. A red rose and a pinkfose are variations of the same species.

The tidal range is best defined as which of the following

What sample of matter has a crystalline structure?

Which set of procedures and observations indicates a chemical change? (1) Ethanol is added to an empty beaker and the ethanol eventually disappears. (2) A solid is gently heated in a crucible and the solid slowly turns to liquid.

How do you know when a phase change happens?

The smallest unit of an element is a blank

How many sodium atoms will create an ionic bond with sulfur?

Rank the elements from smallest to largest electronegativity negativity (smallest at top) 1. N 2. P 3. As 4. Sb

A bicyclist pedaling up a Hill. What type of energy potential or kinetic?

What improvements have been made in modern farming? Select all that apply. 1. machines can do more work over less time 2. better seeds sprout and grow much more quickly 3. trains can transport food over long distances faster 4.