A reaction releases 489.34 J of heat how many calories of heat is that equal to 1 cal equals 4.186 J

A chemistry student found the density of Freon-11 (CFCl3) to be 5.58 g/L under her experimental conditions. Her measurements showed that the density of an unknown gas was 4.38 g/L under the same conditions. What is the molar mass of the unknown?

Iron metal reacts with chlorine gas according to the equation:2Fe (s) + 3Cl2 (g) →2FeCl3 (s) If 25.6 g of iron react completely, how much FeCl3 will be formed?

Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot?

What is the concentration of a solution made by dissolving 8.0 g ch3oh in 250. g of water? find in molality.

Which element is always present in a combustion reaction?

According to the ph scale, what is the approximate ph of acid rain? a. 4.0 b. 4.5 c. 5.0 d. 5.5

You find a little bit (0.150g) of a chemical marked Tri-Nitro-Toluene, and upon combusting it in oxygen, collect 0.204 g of CO2 and 0.030 g H2O (we'll assume that these are the products, along with nitrogen).

What reaction occurs when two amino acids are put together?

A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains of water at. During the reaction of heat flows out of the bath and into the flask. Calculate the new temperature of the water bath.

An aluminum can has a height of 4.83 inches, a diameter of 2.60 inches, and a uniform wall/end thickness of 0.0112 inches.