Chemistry, 19.09.2019 03:00 tylerwayneparks

Eva is performing an experiment to determine which type of disinfectant kills the most bacteria. she has six plates of the same kind and amount of bacteria. she adds one of five different kinds of disinfectant to each plate and leaves one plate without any disinfectant as a control.
what role does the independent variable play in this experiment
a.
the type of disinfectant determines the amount of bacteria killed.
b.
the amount of bacteria killed determines the type of bacteria used.
c.
the type of disinfectant used determines the type of bacteria used.
d.
the amount of bacteria killed determines the type of disinfectant used.

Answers: 2

Show answers

Other questions on the subject: Chemistry

Chemistry, 22.06.2019 09:10, aleilyg2005

Select the correct answer from each drop-down menu. describe what happens to a carbon-11 atom when it undergoes positron emission. the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons

Answers: 3

continue

Chemistry, 22.06.2019 21:30, thompsonhomes1

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted

Answers: 3

continue

Chemistry, 23.06.2019 11:30, spalmer7

How do you calculate the mass of a product when the amounts of more than one reactant are given?

Answers: 3

continue

Chemistry, 23.06.2019 21:50, kayla6653

Absalon adds 1 g of salt to 1 l of room temperature water (25 °c). then, he starts a timer and observes what happens. he notices that it takes 1 minute for the salt to dissolve. he decides to repeat his experiment, and he adds 1 g of salt to another 1 l of room temperature water (25 °c). after he adds the salt, he starts a timer. but, instead of watching the salt dissolve, he stirs the salt and water with a spoon until it dissolves. he notices that it only takes 30 seconds for the salt to dissolve in his second experiment. why does the salt dissolve faster in absalon's second experiment? stirring the salt and water increases the polarity of the water molecules, which causes the ionic bonds of the salt to break. stirring the salt and water increases particle motion, which causes more collisions to occur between the water and salt. stirring the salt and water increases the surface area of the water, which causes more collisions to occur between the water and salt. stirring the salt and water increases the pressure on the solution, which causes the ionic bonds of the salt to break.

Answers: 1

continue

You know the right answer?

Eva is performing an experiment to determine which type of disinfectant kills the most bacteria. she...