What are the five indicators of a chemical change

The chemical equation below shows the combustion of methane (CH4). CH4 + 2O2 - > CO2 + 2H2O The molar mass of oxygen gas (O2) is 32.00 g/mol. The molar mass of carbon dioxide (CO2) is 44.01 g/mol. What mass of CO2, in grams, will form when 8.

Enough of a monoprotic acid is dissolved in water to produce a 1.35 M solution. The pH of the resulting solution is 2.93. Calculate the Ka for the acid.

Cell that perform similar function combine to from

If chocolate is given to teachers, then amount of homework will decrease

List the elements of carbon

H2S (g) + O2 (g) - > SO2 + H2O, how many grams of O2 are needed to make 25.0 g of SO2 (Hint: balance the equation first) a.) 12.5g b.) 18.7g c.) 32.0g d.) can't be determined

With the exception of our sun, most stars are huge, bright balls of gas located trillions of miles away from earth true or false

Which geologic time span covers the majority of Earth's history?

as the flames heat the gases in the balloon the volume of the gases increases at constant pressure the volume of all gases increases with increasing temperatures is this statement a scientific theory or law explain

At 1.0 atm, terell heats a sample of soild caffeine at 178c the soild converts directly into gas. what is the name of this phase change?