1: which of the following is the best example of a valid hypothesis?
a. children like brand...
1: which of the following is the best example of a valid hypothesis?
a. children like brand x peanut butter better than brand y peanut butter.
b. if i add substance x, then it will lower the temperature at which water freezes.
c. people should eat vegetables.
d. bananas are better for you than chocolate. 2: kobe is testing whether 100 g of substance a, 100 g of substance b, or 100 g of substance c produces more oxygen in a chemical reaction at 25°c. what is the independent variable?
a. the masses of the substances
b. the temperature of the substances
c. the amount of oxygen produced
d. the nature of the substances 3: a chemist measures the amount of mercury in sediment samples from three areas of a river (the source, the midway point, and the mouth). which of the following is the most reasonable hypothesis for the chemist's experiment?
a. if a chemical plant near the source of the river is dumping mercury, then the mercury levels should be highest at the source and lowest at the mouth.
b. if a chemical plant near the source of the river is dumping mercury, then the mercury levels should be highest at the mouth and lowest at the midway point.
c. if a chemical plant near the source of the river is dumping mercury, then the mercury levels should be highest at the mouth and lowest at the source.
d. if a chemical plant near the source of the river is dumping mercury, then the mercury levels should be the same all along the river.
Answers: 2
Chemistry, 22.06.2019 09:00, hellodarkness14
This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.
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Chemistry, 22.06.2019 14:00, Killion2022
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