12 Which gas is monatomic at room temperature and

pressure?

(1) nitrogen

(2) neon

(3) fluorine

(4) chlorine

7.) A syringe initially holds a sample of gas with a volume of 285 mL at 355 K and 1.88 atm. To what temperature must the gas in the syringe be heated/cooled in order to have a volume of 435 mL at 2.

Which one of the following melts the fastest: rectangular prism, cylinder, and rectangular trapezoidal trough?

What is electron configuration? How does it work?

When bromobenzene reacts with propene in a heck reaction (in the presence of pd (php3) 4 and et3n), two constitutional isomers are obtained as the products. give the structures of the two products. interactive 3d display mode?

Write the complete symbol, including mass number and atomic number, for each atom. contains 28 protons and 30 neutrons : a. ^{58}_{28}Ni5828Ni contains 22 protons and 21 neutrons : b. ^{43}_{22}Ti4322Ti contains 15 electrons and 19 neutrons c.

When can polar bears take care of themselves

What are two objects used to find density

A sample of oxygen gas (O2) at STP has a mass of 48.0 grams. What is the volume of the gas?

What is the oxidation number for Our in NaHCO3?

To determine if a reaction is exoteric a student should use