What is a example of a molecule of a single element

How many C-13 atoms are present, on average, in a 3.0000*104-atom sample of carbon?

What best explains how two oxygen atoms, each with six valence electrons, can bond with each other? One atom can lose two electrons so that the other atom can gain them and have eight valence electrons.

1. Which statement best describes scientific laws Scientific laws are scientists' opinions of why events occur in nature. Scientific laws describe specific relationships in nature without offering an explanation.

Check all statements below that are true. Heating air under the balloon will cause the air inside to expand. The air inside will have the same mass but more volume. Heating the air under the balloon will cause the entire balloon to rise.

When the following equation is balanced, what is the coefficient for HCl? Mg (s) + HCl (aq) → MgCl2 (aq) + H2 (g) 2 1 3 6

The volume of a gas is reduced from 4 L to 0.5 L while the temperature is held constant. How does the gas pressure change? It increases by a factor of two. It increases by a factor of eight. It decreases by a factor of eight.

Write the complete balanced equation for the decomposition of sodium chloride (NaCl)

What is the term for the different phases water can take?

The amazing successes of science are because scientists have followed the rules of science True or false

In this assignment, you will write and balance a chemical equation. Then, you will use a table of enthalpy values to calculate the energy change in the reaction. Next, you will create a model of the energy change in the reaction.