Which of the following are exact number and which are measured numbers

Baby weighs 1.85 is measured number.

A baker's dozen is exact number.

5.0 microliters injection is measured.

79 students are exact numbers.

Explanation:

An exact number has no uncertainty in it. Measured numbers have a limited number of significant figure

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante