After three half-lives, what fraction of a radioactive sample remains.

The expression below was formed by combining different gas laws. Van Which law was used to determine the relationship between the volume and the number of moles in this equation? Boyle's law Charles's law Avogadro's law Gay-Lussac's law

When placed in a freezer, liquid water turns into solid ice. What best describes this change? The water molecules slow down, bonds are broken, and the separated atoms spread out.

The mass number of an atom is equal to which of the following? Question 4 options: A. the number of protons plus the number of electrons in an atom B. the number of electrons circling the nucleus of an atom C.

What is a hydrocarbon? A. A molecule containing only carbon and oxygen B. A molecule containing only carbon as a solid C. A molecule containing carbon, oxygen, and hydrogen D. A molecule containing only carbon and hydrogen

How many grams are equal to 3.46 moles of sodium sulfide

An easy way to assign the number of d-electrons (the “d count”) in a transition metal ion is to first look at the periodic table and take note of which group the element is in.

A basketball weigh more after it was inflated with air then when it was deflated how does this show that gas is matter

When was Magnesium discovered and how or who discovered it

Consider these statements regarding the body's inability to convert fat to carbohydrates. Select each statement that is true. 1. Acetoacetate is a normal, major energy source for the brain, heart muscle, and renal cortex. 2.

Which is the best term to use describing the energy of position