What is the difference between elements, compounds, and mixtures?

Explanation:

The difference between an element and a compound is that an element is a substance made of same type of atoms , whereas a compound is made of different elements in definite proportions . Mixtures contain different elements and compounds but the ratio is not fixed nor are they combined via chemical bonds.

introduction of a drug directly into the respiratory tract is a form of inhalation administration.

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.