Four 250 ml beakers containing 100 ml of water each were placed side by side on a table.
she then put 50 g sodium chloride , 50 g vegetable oil, 50 g sugar,50 g glycerin into the first, second, third and fourth beakers, respectively.
finally she stirred each beaker for exactly 2 minutes using a different stirring rod for each beaker.
which of the following factors was the variable in her experinent?
a. the quantities of the substances.
b. the time that she stirred the beaker.
c. the substances that were placed in water.
d. the volume of water.
Answers: 1
Chemistry, 21.06.2019 23:30
Whatβs the scientific notation for the number 6,840,000,000
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Chemistry, 22.06.2019 14:30
Consider the reduction reactions and their equilibrium constants. cu+(aq)+eββ½βββcu(s)pb2+(aq)+2eββ½βββpb(s)fe3+(aq)+3eββ½βββfe(=6.2Γ108=4.0Γ10β5=9.3Γ10β3 cu + ( aq ) + e β β½ β β β cu ( s ) k =6.2Γ 10 8 pb 2 + ( aq ) +2 e β β½ β β β pb ( s ) k =4.0Γ 10 β 5 fe 3 + ( aq ) +3 e β β½ β β β fe ( s ) k =9.3Γ 10 β 3 arrange these ions from strongest to weakest oxidizing agent.
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Chemistry, 22.06.2019 18:00
The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.
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Four 250 ml beakers containing 100 ml of water each were placed side by side on a table.
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