Riley is doing an experiment working with friction. He wants to find two ways to modify an object that could increase or decrease the same type of friction.

Which methods could he use to perform his experiment?

10) What does mRNA copy and carry the code to produce? (1pt) a) DNA b) Proteins

Why does molecular polarity occur?

Forces can be added together only if they are?

What are the names of the structures in the lungs where gas exchange accuse?

A gas occupies 72.1 at stp. At what temperature would the gas occupy 85.9 L at a pressure of 93.6 kPa?

Why can two igneous rocks have the same minerals but different names?

Where do the heaviest elements in our solar system come from?

Four students presented different analogies to describe the formation of an ionic bond. Student A: A tug of war between seven middle school students and a high school student Student B: A small dog and a big dog tugging at a bone with equal strength

Chemical reactions occur when molecules or atoms collide so that the bonds between atoms break and new bonds form. breaking the bonds of the reactants requires energy; whereas, bond formation releases energy.

Calculate the volume of a 0.323-mol sample of a gas at 265 K and 0.900 atm.