I need help with this question 20 points and brainiest if ur right

What’s the percent by mass of carbon in c10h14n2

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.

What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?