Is it possible to identify something as an element, compound or pure substance

Bromine (63 g) and fluorine (60 g) are mixed to give bromine trifluoride. a) Write a balanced chemical reaction. b) What is the limiting reactant? c) Determine how many grams of the product will form if the percent yield of the reaction is 80%.

A doubling of the concentration of a doubles the rate of the reaction. a. True b. False

A 27.40 g sample of liquid mercury is initially at 158.30°C. If the sample is heated at constant pressure ( = 1 atm), kJ of energy are needed to raise the temperature of the sample to 376.20°C. How much energy in kJ is required?

Is humidity a measure of water vapor or brametric pressure

What is the valence electron configuration of the group 2a elements?

What is the molarity of a solution with 1.17 moles of Ca (OH) 2 disolved in 0.2 liters of water? A. 1.17 M B. 0.2 M C. 0.17 M D. 5.85 M

What happens to acetone molecules when you add heat to a beaker of liquid acetone?

An effluent discharge with a flow of 1.5 m3/s and an ammonium-N concentration of 2 mg/L is released to a river with a flow of 12 m3/s and an ammonium-N concentration of 0.015 mg/L.

If you were to pour 4 different liquids into a glass and the liquids separated into 4 layers, which liquid would have the highest density?

As magma rises to the surface what happens to the gases in it