Which statement best describes the nobel gases?

A) they are highly reactive

B) they combine easily with other elements.

C) They have an outer shell that needs only 1 electron

D) they have a full outer electron shell.

Engineers increase output in crop production by combining the strengths of two plants. This can be done by using one plant to pollinate a different plant so that their strengths are combined into a new plant. What is this technique called?

A patient needs to take 625 mg of ibuprofen twice daily. the pills are each 250 mg. how many pills does the patient need to take each time?

Which best describes ionization energy? energy needed to add an electron to a neutral atom in the gas phase energy needed to add an electron to a neutral atom in the liquid phase energy needed to remove an electron from an atom or ion in the gas

Which of the following influence the pressure of gases? (select ALL that apply) Volume Temperature Color Amount of gas (moles) Location Type of gas

Active transport requires chemical energy. True False

The atomic mass of fluorine in 19.0 amu, so the molar mass is?

A rod shaped organism with no nucleus commonly found in Garbage will most likely belong to which kingdom

Alka-Seltzer is a solid mixture of two substances, sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O7). The substances react to form water, carbon dioxide (CO2), and Na3C6H5O7.

Four properties of water are listed. 1. It is colorless and odorless in its pure form. 2. It reacts with metals to form metal hydroxide and hydrogen gas. 3. When heated to 100 °C, water evaporates. 4. It decomposes to form hydrogen and oxygen.

Water is A. Acidic B. Basic C. Neutral