Front

What is a transition element?

Back

Transition elements are metallic elements that have partially filled d orbitals. They are found in the d-block of the periodic table and include elements like iron, copper, and nickel.

Front

What is the electron configuration for iron (Fe)?

Back

The electron configuration for iron (Fe) is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶.

Front

How do you calculate percent by mass of an element in a compound?

Back

Percent by mass = (mass of element in 1 mole of compound / molar mass of compound) x 100%.

Front

What is the molar mass of Fe₂O₃?

Back

The molar mass of Fe₂O₃ is approximately 159.69 g/mol.

Front

What is the formula for calculating partial pressure in a gas mixture?

Back

Partial pressure = Total pressure - Sum of the partial pressures of other gases.

Front

What is the ideal gas law equation?

Back

The ideal gas law is PV = nRT, where P is pressure, V is volume, n is number of moles, R is the ideal gas constant, and T is temperature in Kelvin.

Front

What is the chemical formula for calcium nitrate?

Back

The chemical formula for calcium nitrate is Ca(NO₃)₂.

Front

What is STP in chemistry?

Back

STP stands for Standard Temperature and Pressure, which is defined as 0 degrees Celsius (273.15 K) and 1 atm pressure.

Front

How many liters of gas are produced at STP from 1 mole of gas?

Back

At STP, 1 mole of an ideal gas occupies 22.4 liters.

Front

What is the balanced equation for the decomposition of water?

Back

The balanced equation is 2H₂O(l) → 2H₂(g) + O₂(g).