How many hydrogen atoms are in 2.20 mol of ammonium sulfide?

Why does the ionization energy change when moving down a group of elements? The number of valence electrons increases. The nuclear positive charge increases. The energy levels are increasing. The attractive force decreases as the atom gets larger.

Mass = 386g volume = 30cm3

How is the movement of particles in diffusion determined?

Given the balanced reaction CH4 + 2O2 - > CO2 + 2H2O2 How many moles of oxygen are needed to completely react with 1 mole of CH4? 2 moles 4 moles 1 mole 0.5 moles

Five pulses are generated every 0.112 s in a tank of water. What is the speed of propagation of the wave if the wavelength of the surface wave is 1.20 cm?

Marissa is learning about the unique properties of waves. She has learned that whenever the wavelength of a wave increases, the frequency of the wave decreases.

Which answer choice best explains why uranium-238 can be used in power plants to generate electricity? A) Nuclides of uranium-238 decay over time. They release large amounts of energy as their nuclei break apart.

Explain how you can use physical properties to compare substances.

How is this model useful?

What is the frequency of a wave? A. The amount of time that one full cycle takes B. The distance traveled by the wave during one full cycle C. The amount of cycles that occur in a given time D. The distance from the beginning to the end of a cycle