How much energy is required to raise the temperature of 12.4 grams of solid magnesium from 23.1 °C to 36.9 °C?
In joules

How air particles exert a pressure on the inside of the balloon

You have 125g of a certain seasoning and are told that it contains 76.0 g of salt what is the percentage of salt by mass in this seasoning

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6