iron has a density of 7.874 g/mL. if a sample of iron has a mass of 7.75 grams, what is the volume of this sample in dL

during which of the following processes does the entropy of the system decrease? salt crystals dissolve in water air escapes from a hole in a balloon ice melts at room temperature liquid water boils methane gas and oxygen gas combust to form carbon

How many atoms are there in 15.999g of oxygen

What pressure is required to reduce 57 mL of a gas at standard conditions to 19 mL at a temperature of 26°C?

In what important way was Mendeleev's Periodic Table different from the modern Periodic Table?

Which term labels a solution A. a graduated substance B. a homogeneous mixture C. a heterogeneous mixture D. a primary make sure of elements

Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus.

Consider the polymerization of styrene in toluene at 60°C initiated by di-t-butylperoxide for a solution containing 0.04 mol of initiator and 2 mol of monomer per liter. The initial rates of initiation, Ri, and propagation, RP, are found to be 1.

If an atom has an atomic number of 15 and an atomic mass of 31, how many protons, neutrons and electrons does the atom contain?

What is formed when sediment is blown against an obstacle and settles behind it

Compared to the radius of a chlorine atom, the radius of a chloride ion is (1) larger because chlorine loses an electron (2) larger because chlorine gains an electron (3) smaller because chlorine loses an electron (4) smaller because chlorine gains