Determine the mechanical energy of this object:

a 1kg ball sits on a 10 meter high cliff

a. 980j

b. the ball isn't moving. so the mechanical energy is zero

c. 98j

d. 10j

Given the reaction: HSO4 - + HPO42 - ↔ SO42 - + H2PO4-Which pair represents an acid and its conjugate base? A) HSO4 - and HPO42- B) SO42 - and H2PO4- C) HSO4 - and SO42- D) SO42 - and HPO42-

Consider the following unbalanced redox reaction: Cr2O72 - (aq) + NO2 (aq) - Cr3 + (aq) + NO3 (aq) What is the oxidizing agent in the reaction?

The men's world record for swimming 1500 m in a long course pool is 14 min 34.56 s. At this rate how many seconds would it take to swim 0.700 miles

When heat, light, or sound is given off or absorbed, is it a chemical change, chemical property, physical change, or physical property?

What is a formula unit of a compound

What mass of methanol is combusted in a reaction that produces 112 L of Co2 at STP? A. 112g B. 81.6g C. 64.1g D. 160g

How many moles of O2 are needed to react with 24 moles of C2H6?

The Second Law of Thermodynamics states that the total amount of entropy in the universe is

Which force acts an an object to move it from rest or a constant, straight-line motion? A-balanced B-unbalanced C-inertial D-along a straight line

When preparing a buret for use in lab, the buret must always be cleaned thoroughly. prior to being filled with solution, the buret is rinsed one last time. what is the buret rinsed with, and why?