Kiran lit a candle. she placed a 100cm glass jar over the candle. the candle flame went out after 2 seconds. why did the flame go out

A graduated cylinder contains 49.2 mL of water. A 51.3-g piece of metal is carefully dropped into the cylinder. When the metal is completely covered with water, the water rises to the 56.1 mL mark. What is the density of the metal? a) 6.9 mL b) 6.

The visible spectrum of the Cr (acac) 3 complex is significantly different from the [Cr (en) 3]Br3 complex. Why?

Which of the following has the smallest first ionization energy: F, Be, Sr or Ra? F Be Sr Ra

During an experiment, iron powder and sulfur powder were heated together to form a black mass. It was observed that a magnet, when brought near the black mass, did not attract the black mass.

Calculate the number of moles of o2 gas held in a sealed, 2.00-l tank at 3.50 atm and 25.0°c. how many moles would be in the tank if the temperature was raised to 49.0°c and the pressure remained constant (trick question) ?

Describe a chemical formula give an example

Consider the reaction between barium chloride and sodium sulphate. If 25.0 mL of 0.75 M barium chloride react, how many grams of solid are produced?

Which of the following is the correct definition of nuclear energy? energy produced from the splitting of atoms energy an object has because of its motion or position energy stored in chemical bonds of molecules energy resulting from the flow of

Ethyl acetate reacts with H2, in the presence of a catalyst to yield ethyl alcohol: C4H8O2 + 2H2--> 2C2H6O. A. How many grams of ethyl alcohol are produced by reaction of 2.7 mol of ethyl acetate with H2? B.

Why is it incorrect to balance a chemical equation by changing the subscripts?