A large sample of solid calcium sulfate is crushed into smaller pieces for testing. which two physical properties are the same for both the large sample and one of the smaller pieces?

How many inner, outer, and valence electrons are present in an atom of each of the following elements? (a) O (b) Sn (c) Ca (d) Fe (e) Se

NH3+HNO2 → What is the product

Constructive interference occurs when the amplitudes of two waves combine to produce a wave with a smaller amplitude. t or f

Why is Medical Science Important in finding treatment for viruses?

Give the total number of atoms in one formula unit of CaC2O4

A population of crabs live on a light-colored sandy beach. In this environment there is a population of birds that eat the crabs. One year, there is a volcanic eruption near the beach and dark volcanic ash covers the beach.

It would take one light year to travel to the sun? True or false?

A specific, electrically neutral atom of boron has 5 protons, 5 electrons, and 6 neutrons. what is the mass number of this atom of boron? 6 5 11 16

When does hail happen?

For the reaction, calculate how many moles of the product form when 0.012 mol of O2 completely reacts. Assume that there is more than enough of the other reactant. 4Al (s) + 3O2 (g) →2Al2O3 (s) Express your answer using two significant figures.