The chemical equation below shows that hydrogen and oxygen chemically react to form water. Which of these is true?
A.
Water is a pure substance and has the same properties as oxygen.

B.
Water is a pure substance and has the same properties as hydrogen.

C.
Hydrogen and oxygen are pure substances that have identical properties to each other.

D.
Hydrogen, oxygen, and water are pure substances that each have different properties.

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.

Increasing the pressure on one spot of a fluid will increase the pressure everywhere else in the fluid a. pascals principal b. archimedes' principal c. bernoulli's principal

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=