The electron pair geometry of a molecule is tetrahedral. What is its bond angle if it shows one lone pair of electrons and three bonding pairs?

A) Less than 109.5°

B) More than 109.5°

C) Equal to 109.5°

D) Zero

The mass of 3.45 L of hydrogen gas at SATP

What are the coefficients for the following reaction when it is properly balanced? ___HCl + ___Mg → ___MgCl 2 + ___ H2

Which of the following is an example of a molecule? (A) CO₂ (carbon dioxide). (B) H₂O (water). (C) O₂ (oxygen in atmosphere). (D) NaCI (sodium chloride:table salt).?

The Lewis structure of HCl has a double-bond. TRUE FALSE

Por qué dos iones sodio reemplazan un ion de calcio o de magnesio

Which requires the removal of heat, melting or freezing? Is it evaporation? What is it? Why?

Waves are the major force of erosion along coasts

Cup A and cup B are identical. They contain equal volumes of soup at equal temperatures. Both cups are put in a refrigerator. Cup A has a lid, but cup B does not. Which statement best explains why cup A will cool more slowly than cup B? A.

Water is intentionally present in a state where its molecules are far apart during a change of state is molecule slow down which change of state has most likely taking place

What determines the definite energies of electrons?