A gas ja that has a 3.0 x 1023 molecules of Hydrogen gas, H2 at rtp. What mass of hydrogen does it contain?​

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

What term describes technology that operates on an atomic level