A student does not observe a change when holding a test tube in a flame. However, a change is expected. What is the most likely reason for this?

How do scientists determine the number of neutrons in an isotope of an atom A. They find the number of protons B. They add the number of electrons and protons C. They divide the atomic mass by two D.

A certain solution has [H3O+] = 8.1 X 10-8 M Calculate the pH of this solution

Which would result in radioactive decay? Check all that apply

The symbol for xenon (Xe) would be a part of the noble gas notation for the element antimony. cesium. radium. uranium.

An ideal gas will occupy 22.4 L at standard temperature and pressure. What is this volume in cubic centimeters? - cm3

Happened to dodo birds and tasmanian wolves

A 0.642g sample of an unknown gas was collected over water at 25.0°C and 1.04 atm. The collection cylinder contained 151.3 mL of gas after the sample was released. Find the molar mass of the unknown gas.

When the energy of a sound wave is transferred to a particle of a medium and causes it to vibrate and generate heat the sound wave is

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