Chemistry, 19.02.2021 14:00 grimwolf1023
Imran did an experiment to see how changing the
surface area of limestone affected the rate at which
it reacts with hydrochloric acid. He timed how long it
took for the reaction to produce 50 cm3 of carbon
dioxide gas. His results are shownin the picture
a) What was the independent variable in this
experiment?
b) What was the dependent variable in this
experiment?
c) Which had the biggest surface area large chips,
small chips or powder?
d) What is the relationship between the surface area
and the time the reaction takes?
e) What is the relationship between the surface area
and the rate of the reaction?
Answers: 3
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Express the following number in scientific notation. 0.026890 =
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Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?
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Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy
Answers: 1
Imran did an experiment to see how changing the
surface area of limestone affected the rate at whic...
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