In the formula 5CaSO4 the total number of sulfur atoms present is a. 1. b. 5. c. 9. d. 20?

Which of the following enzymes breaks down the "glue" that holds cells together? 1) Hyaluronidase 2) Streptokinase 3) Fibrinolysin 4) Collagenase

A neutral atom of nitrogen (N) gains three electrons to create the anion, N-3. To which suborbital are these electrons added? A. 1s B. 2s C. 2p D. 3s

According to this graph, a lake that has a pH level of 4

Each human skin cell has pairs of chromosomes.

A parallelogram has side lengths of 4 and 6 and an angle of measure 55°. Law of cosines: a2 = b2 + c2 - 2bccos (A) What is x, the length of the diagonal, to the nearest whole number? 3 5 6 7

Identify the precipitate (if any) that forms when KOH and Cu (NO3) 2 are mixed

An atom has a mass number of 27 and 14 neutrons. what is the atomic number of this atom?

The two forms of oxygen, O2 (g) and O3 (g), have (1) different molecular structures and identical properties (2) different molecular structures and different properties (3) identical molecular structures and identical properties (4) identical

What is the difference between a distraction and a reaction

if carbon which has an electrongavity of 2.5 bonds with hydrogen, which has an electrongavity of 2.1, the bond between the two atoms will be classified as a (n) covalent bond