NYC Chemistry Regents Exam Jan 2023 Which sample of matter is a mixture? (1) CO2 (g) (2) CCl4(l) (3) MgCl2 (aq) (4) Sn(s) Solution: A...

NYC Chemistry Regents Exam Jan 2023 Which substance can not be broken down by a chemical change? (1) ammonia (2) ethanol (3) krypton (4)...

NYC Chemistry Regents Exam Jan 2023 The degree of polarity in the bond between a hydrogen atom and an oxygen atom in a molecule of water...

NYC Chemistry Regents Exam Jan 2023 Which statement describes the changes in bonding and energy that occur when a molecule of iodine, I2,...

NYC Chemistry Regents Exam January 2023 Which type of bond forms when electrons are equally shared between two atoms? (1) a polar...

NYC Regents Exam Jan 2023 Which substance contains elements chemically combined in a fixed proportion? (1) manganese (2) methane (3)...

NY Chemistry Regents Exam Jan 2023 7 Which element has chemical properties most similar to sulfur? (1) argon (2) fluorine (3) nitrogen...

NY Regents Chemistry Exam Jan 2023 6 Which phrase describes the crystal structure and properties of two different forms of solid carbon...

Regents Chemistry Exam Jan 2023 5 Which element has the lowest density at 298 K and 101.3 kPa? (1) argon (2) fluorine (3) nitrogen (4)...

Regents Chemistry Exam January 2023 4 Which list of elements includes a metal, a metalloid, and a noble gas? (1) Rb, Cl, Ne (2) Sr, Si,...