2.5 moles of oxygen produces how many moles of water? The reaction: CH4 + 2 O2 + 2 H2o
Please explain it so i can understand

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

When the volume and number of particles of a gas are constant which of the following is also constant

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?