The combustion of methane is represented by the following chemical equation:

CH4 (9) + 202 (g) + CO2 (g) + 2H2O (g) + energy

Is this reaction endothermic or exothermic?

Something breaking is an example of what kind of change? A. physical only B. chemical only C. physical and chemical

Which one of the following exhibits dipole-dipole attraction between molecules?

Which of the following is a variable property for a gas? Select all that apply. A.) Mass B.) Denstiy C.) Volume D.) Shape

Will give brainlest. Quinn was attempting to model the rock cycle with taffy pieces. She cut the taffy into small pieces with scissors. What portion of the rock cycle is she modeling to start her activity? A.

Diamond is one of several naturally occurring forms of carbon. one carat is defined to be exactly 0.200 grams. how many atoms of carbon are in a 0.75 carat diamond? use "e" for scientific notation

What happens to iron oxide during decomposition

What is the symbol for the second most common element in the universe? a. H b. C c. Fe d. He?

Which class of organic compound would neutralize a carboxylic acid? O aldehyde amine alkyl halide ether

Calculate the molarity of the solution. 29 g of NaCl (g. f. w. = 58.5 g/mol) in 0.030 liters. 0.015 M 17 M 67 M

How can scientists study the composition of distant stars?