You go out to dinner and the bill comes to $ 34.63. How much should you tip if you want the tip to be 20.0 % of the bill? Express the dollar amount to the nearest cent.

What is the transfer of energy that occurs because of a difference in substance

The total number of oxygen atoms indicated by the formula al2 (cr2o7) 3 is

Which is an element? ... air ... carbon dioxide ... hydrogen ... water Description

An covered pot of soup is simmering on a stove, and there are water droplets on the wall above the back of the stove. What sequence can you infer has occurred?

Energy conversion and transfer together with associated temperature change in exothermic

Consider the following thermochemical equation: C (s) + O2 (g) → CO2 (g) ΔH = - 393 kJ CO (g) + ½O2 (g) → CO2 (g) ΔH =

Two colorless solutions are mixed together. Bubbles form as the solution is stirred. Give TWO possible explanations for this result.

What is a light-year? A. the distance light travels in one earth year B. the distance light travels from the sun to the earth C. the distance light travels in one orbit of the moon D. the time it takes light to travel across the universe

What's is a logical way that you could begin to investigate why your tire had low air pressure?

after balancing the redox equation FeCl3+Zn--->ZnCl2+Fe, what are the coefficients, in order from left to right?