Jeff's father is installing a do-it-yourself security system at his house. He needs to get a device from his workshop that converts electric energy to sound energy. Which device is Jeff's father looking for?

In what other planets did differentiation occur? Neptune Mercury Venus Jupiter Mars

If there are 11 protons and 10 neutrons in the nucleus of an atom, what is the atomic number?

A 0.055 mol sample of formaldehyde vapor, CH2O, was placed in a heated 500 mL vessel and some of it decomposed. The reaction is CH2O (g) H2 (g) + CO (g) At equilibrium, the CH2O (g) concentration was 0.051 mol L-1.

What is the electron configuration of kr?

If you leave a solar powered flashlight in the sun for 8 hours, it will be able to stay lit for 3 hours. What would happen if you placed the flashlight under a bright light bulb for 8 hours?

How many moles of a gas will occupy 2.50L at STP

Which has more kinetic energy, a small sports car traveling at 30 km/hr or a large tractor-trailer traveling at 75 km/hr?

A Lay's potato chip weighing 4.03g is put into a bomb calorimeter containing 895.5g of water at 25.10°C. If this increases the temperature of the surrounding water to 48.89°C, what is the amount of calories per serving if 1 serving = 28.38g.

Which element is the least metallic between cadmium, silver, zinc, or iron?

Describe the motion of molecules in an ice cube an in a radiator in winter