Calculate what is the atomic number of a sodium atom that has 11 protons and 12 neutrons

Litharge, PbO, is an ore that can be roasted (heated) in the presence of carbon monoxide, CO, to produce elemental lead. This is the balanced equation: PbO (s) + CO (g) - -> Pb (s) + CO_2 (g) What is the oxidation number of lead in litharge.

In an atomic model that includes a nucleus, positive charge is a. located in the space outside the nucleus. b. spread evenly throughout an atom. c. concentrated at multiple sites in an atom. d. concentrated in the center of an atom.

In a different experiment, the student uses a calorimeter which is perfectly insulated. She fills the calorimeter with 100.0 g of 25.00°C dilute HCl solution and adds 0.594 g Mg metal (24.3 g/mol). The final temperature of the apparatus comes to 41.

What is true of a molecule? Question 2 options: Each molecule of a compound has different properties. All molecules of a compound have the same properties. All molecules of a compound have one type of atom. Each atom of a molecule is the same.

Where are the youngest regions in the ocean? Where are the youngest regions in the ocean?

Which two factors determine sound intensity? A the wave's frequency and speed B the wave's amplitude and the distance from the sound source C the wave's amplitude and speed D the wave's frequency and the distance from the sound source

The electrical wires in your home use what type of circuits? parallel circuits series circuits

In the actual co2 molecule the best description of the number of bonds between c-o atoms is

How many hydrogen atoms are in Ca (OH) 2

Explain fajan's rule