Which of the following is an element?

a. zinc metal (zn)

b. carbon monoxide gas (co)

c. magnesium chloride salt (mgcl)

d. hydrochloric acid (hcl) ?

Why isn't a different base broth required for each decarboxylase test?

How has earth changed during our masses era?

On the periodic table, a "period" is A. all of the elements colored orange. B. all of the elements colored green. C. a vertical column of elements. D. a horizontal row of elements.

Water is known as a polar molecule because check all that apply. the oxygen atom has a greater attraction for electrons than the hydrogen atom does. the hydrogen atom attracts electrons much more strongly than the oxygen atom.

Ionization energy is a measure of the ability of atoms to attract electrons within a bond. True False

Which Group 16 element combines with hydrogen to form a compound that has the strongest hydrogen bonding between its molecules? 1. oxygen 2. selenium 3. sulfur 4. tellurium

How many hydrogen atoms are in 2.80 mol of ammonium sulfide?

What is a large oval structure that directs all of the cells activities?

HBr + H₂SO₄ SO₂ + Br₂ + H₂O What is the oxidation number of the oxidizing agent? What is the oxidation number of the reducing agent?

How do find the volume of 60.0g of ether if the density is. 70g/mL?