Which of the following is an example of a double replacement reaction?

(a) 3Fe + 2O2 Fe3O4

(b) BaCl2 + K2CO3 BaCO3 + 2KCl

(c) NiCO3 NiO + CO2

(d) Cl2 + 2NaBr 2NaCl + Br2

Potassium has a 1 + charge, and oxygen has a 2 - charge. A Lewis dot diagram should contain two potassium atoms and one oxygen atom to show how these atoms form an ionic bond. True or false

Which arrow best dedcribes the process that arrow one represents

How did Dalton describe the relationship between atoms and elements? An element is made up of one kind of atom. Atoms are made up of combinations of elements. Elements are made up of atoms arranged in whole-number ratios.

How cobalt can be produced from aqueous cobalt sulphate?

Describe how the mass of the product can be calculated when one reactant is in excess

What does the dashes line represent? A. Medium B. Boundary C. Normal D. Incident Ray

Only a small amount of cerium oxide nanoparticles is needed because the nanoparticles ... 1) are elements 2) are very reactive 3) have a high surface area to volume ration

Describe the solubility of water compared to ethanol?

When the free-energy change (AG) of a reaction is negative, the reaction is said to be: Endergonic Non spontaneous Spontaneous Endothermic

The solubility of carbon dioxide gas in water can be increased by