4 Suzanna notices that when she rolls a marble on the carpet, the marble slows down and stops. What

force causes the marble to change its motion? How does this force act?

Which best describes what happens when a neutral atom becomes a positive ion? O A. The remaining electrons spread farther out. O B. The excess protons pull harder on the fewer electrons O C. The remaining electrons are more easily lost. O D.

3C + 2Fe2O3 - 4Fe + 3002 What's the coefficient and subscript of Fe?

The layer that is responsible for our magnetic field.

Which is the largest number? OA. 4.5 x 10^7 OB. 9.9 x 10^6 OC. 5.8 x 10^8 OD. 5.5 x 10^5

Which is a stronger base, HSO4 or H2PO4

List at least two chemical reactions that resulted in a yellow, orange, or red precipitate. For these reactions, list the possible chemical name of the precipitate.

You place air in a sealed can at stp. ypu triple its absolute temperture (K) while leaveing the volume constant. what happenes to the pressure

A current of 10.4 a is applied to 1.25 l of a solution of 0.552 m hbr converting some of the h + to h2 (g), which bubbles out of solution.

What is a greenhouse gas?

Which statement best describes a mole?