Which of the following is necessary for plants to exhibit phototropism?

A. Gravity

B. Touch

C. Auxin

D. Dormancy

Which of the following elements would be likely to form an anion? a. Na c. Ar b. Cl d. Ne

What fuel is produced by the electrolysis of water? chlorine gas hydrogen gas natural gas oxygen gas

What is a scientific explanation that can be tested?

An aqueous solution containing 6.51 g NaOH is added to an aqueous solution containing 19.3 g H3PO4. (a) Write a balanced equation for the acid-base reaction that should occur. (Include physical states.)

Write a balanced equation for the combustion of hexane, C6H14 (l)

How can a neutral atom become a positively-charged particle?

The last column of the periodic table contains the noble gases, elements that do not easily form chemical bonds.

When pollution is removed from the air by a natural process, it

What atomic property is different in each isotope of an element?

How do carbon-12 and carbon-13 differ? Select all that apply. They have different amounts of neutrons. They have different atomic charges. They have different mass numbers. They have different amounts of electrons.