Plz unit
1 ) terry heats to different masses of substance a to different temperatures, and measures the amount of both carbon dioxide and water produced. which of the following is true about this experiment?
a. this experiment is uncontrolled because to gaseous products are measured.
b. this experiment is well control because the masses of substance a and the product are varied.
c. this experiment is uncontrolled because two different masses of substance a are used.
d. this experiment is well controlled because only the mass of substance a is varied.
2 ) a material has a density of 8.9 g / cm3 you have 3 cubic centimeters of substance. what is the material's mass in grams
a. 0.3 g
b. 3.0 g
c. 5.9 g
d. 27 g
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