12. Which of the following is a combustion reaction?
A. CH4 + 202
+ CO2 + 2H2O
B. 2Fe + 3Cl2 → 2FeCl3
C. Ag + KNO3 → AgNO3 + K
D. 2H20 → 2H2 + O2

What must occur for air masses to form fronts

Complete the following statements to describe solids, liquids, and gases. select the correct answer from each drop-down menu. a solid a definite volume and a definite shape. a liquid a definite volume and a definite shape. a gas a definite volume and a definite shape

Astudent uses universal ph paper to find the ph of three solutions . solution a has a ph of 5 solution b has a ph of 11 and solution c has a ph of 7 identify which solution is acidic which solution is neutral and which solution is basic