In an experiment, a 2.514-g sample of calcium was heated in a stream of pure

oxygen, and was found to increase in mass by 1.004 g. Calculate the empirical

formula of calcium oxide.

A mixture in which particles are not evenly distributed and particles keep their unique properties. A) Element bonding B) homogeneous mixture C) compound D) heterogeneous mixture

How can you locate a family of elements in the table? Name all the elements in the oxygen family.

There are__electrons in the covalent bond between C and O in CO.

What are the major function of the digestive system

6) Find the pH of the following solutions: a) 0.00010 M HClO4 b) 2.35 x 10-3 M HI c) 4.678 x 10-5 M HNO3 d) 0.0000877 M HCl e) 0.00020 M HF f) 0.0000061 M H3O+ g) 4.3 x 10-3 M NaOH (This is a base! Remember you will be finding pOH first!) h) 6.

Given that the molar mass of NaCl is 58.44 g/mol, what is the molarity of a solution that contains 87.75 g of NaCl in 500. mL of solution? moles of solute Use molarity - liters of solution

What are 3 ways to seperate metal particles and salt

Sarah heated some orange coloured crystals in a test tube. The crystals turned green and fizzed. After the fizzing stopped, the test tube was allowed to cool. A green powder was left in the tube.

In which orbital does an electron in a bromine atom experience the greatest effective nuclear charge?

Kool-Aid is made up of sugar (C6H12O6), food coloring, and water. It is an example of a (n) element heterogeneous mixture homogeneous mixture compound