Are aliens real.

(Obviously they are I'm just bored)

If 420 joules of heat energy is added to 25 grams of water at 25 degrees celcius, what will be the final temperature of the water, in Celcius degrees?

Calculate the atomic mass of gallium, symbol Ga. Gallium has two isotopes: Ga-69 and Ga-71. The relative abundance of Ga-69 is 60.12% and its atomic mass is 68.9257 amu. The relative abundance of Ga-71 is 39.88% and its atomic mass is 70.9249 amu

What is about 40 km thick on average

The form of oxygen that combines three oxygen atoms to each molecule, is found in the stratosphere and shields out harmful UV rays from the sun is:

Which of the following observations likely describes a physical change?

Watch the animation, then check off the samples that will conduct electricity. Check all that apply. View Available Hint (s) Check all that apply. NaCl solution Solid NaCl Solid sugar Sugar solution

Burning wood represents a chemical change. True or False?

Why are phosphates in laundry detergent

What is the name of the scientist who discovered the electron

Which of these is not a covalent molecule? 1. F2 2. CO 3. LiF 4. NH3