Determine the average atomic mass of helium, which has two isotopes having atomic masses 4.0026 amu and 3.0160 amu. The relative abundance of the two isotopes is 99.9999 percent and 0.0001 percent, respectively.

A student makes measurements to calculate the density of a rod of aluminum to be 3.26 g/cm3. If the actual density of the aluminum rod is 2.70 g/cm3, what is the percent error? 15.5% 5.93% 94.41% 20.7%

In chemical reactions, atoms are a. created. c. rearranged. b. destroyed. d. neutralized.

The number of blank in an atom of an element is the element's atomic number

What is the difference between natural capital and natural resources?

Identify special properties of water including surface tension and specific heat

Initially you dissolved all, or most, of the p-aminobenzoic acid in ethanol. then you slowly added sulfuric acid. as you did this, a large amount of white solid formed. during the course of the reaction, that white solid dissolved.

How do you know if a chemical reaction has occurred?

Why must a container or system be closed for equilibrium to be established?

What is the bond angle between the hydrogen atoms in an ammonia (NH₃) molecule?

In Experiment 1, the density of pure ethanol was found to be:Question 1 options:less than 0.793 g/mL. 0.793 g/mL. 0.999 g/mL. greater than 0.999 g/mL.