Quantitative observations always include a. numbers b. words c. time d. symbols

A. numbers

Explanation:

Quantitative observations are those that quantify data through the use of numbers. This is done in order to generalize results from a sample to the population that is being studied. Quantitative research tends to rely on random samples and statistical data and analysis. Moreover, it tends to use methods such as questionnaires, surveys and interviews.

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products

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