An acute staphylococcal infection with blister-like lesions containing millions of virulent bacteria is known as

Impetigo.

Explanation:

Impetigo is the condition caused by bacterial infection and shows yellow crust  on the patient's arms, legs and face. Antibiotics are useful in the treatment of impetigo.

Impetigo is caused by the bacteria Staphylococcus aureus. Acute infection with bacteria can cause large blister like lesions in the armpits or groin. These lesion contain millions of virulent bacteria.

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.