Answered

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D
more than 80 s.
2.
A student carried out 2 experiments to investigate the rate at which gas was given
off when indigestion tablets were added to dilute hydrochloric acid.
She used her results to draw curves on a graph.
syringe
Experiment1
volume
of gas
(cm)
Experiment 2
tablet
50 cm acid
Experiment
Time/seconds
Experiment 2 could have been carried out
A
B
at a lower temperature
using more concentrated hydrochloric acid
using half an indigestion tablet
using a crushed tablet.
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Sagot :

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B is the answer I


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A Ana
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