Question

To write a valid chemical formula, what must be true?

a. The formula must represent a pure substance.
b. The formula must include at least three elements.
c. The formula must start with a consonant.
d. The formula must be written in cursive handwriting.

Answer 1

To write a valid chemical formula, it must represent a pure substance, include at least two elements, start with a consonant, be written using correct chemical symbols, and accurately represent the ratio of elements in the compound.

Step-by-step explanation:

A valid chemical formula must meet several criteria:

1. The formula must represent a pure substance.
2. The formula must include at least two elements.
3. The formula must start with a consonant.
4. The formula must be written using correct chemical symbols.
5. The formula should accurately represent the ratio of elements in the compound.