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algol13
3 years ago
8

A student mixes chemicals A and B together and records the amount of time it takes for a color change to occur. The student repe

ats the process 5 more times each time changing the amount of chemical B used in the mixture. The independent variable in this experiment is the:
Chemistry
1 answer:
k0ka [10]3 years ago
8 0

Answer:

It is mentioned that the student is mixing chemicals A and B and observes the time taken for the color to change. However, in the experiment, it is noticed that the student has repeated the procedure five times and each time he or she is modifying the concentration of chemical B. Thus, it is clear that the concentration of chemical B is the independent variable in the experiment. An independent variable is illustrated as the variable, which is controlled or modified in the experiment.

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5 0
3 years ago
Read 2 more answers
Which choice gives the correct oxidation numbers for all three elements in rb2so3 in the order that the elements are shown in th
vlabodo [156]
<h3>Answer:</h3>

             Rb  =  + 1

              S    =  + 4

              O   =  - 2

<h3>Explanation:</h3>

                   Oxidation states of the elements were calculated keeping in mind the basic rules of assigning oxidation states which included assignment of +1 charge to first group elements i.e. Rubidium (Rb) and assignment of -2 charge to Oxygen atom. Then the oxidation state of Sulfur was calculated as follow,

Rb₂ + S + O₃  =  0

Above zero (0) means that the overall molecule is neutral.

Putting values of Rb and O,

                                           (+1)₂ + S + (-2)₃  =  0

                                           (+2) + S + (-6)  =  0

                                           +2 + S - 6  = 0

                                           S - 6  =  -2

                                          S  =  -2 + 6

                                           S  =  + 4

7 0
3 years ago
3. How many moles of HCl are present in 3.70 L of a 2.33 M HCl solution?
Lubov Fominskaja [6]

Answer:

8.6 mol

Explanation:

number of moles = molar concentration x volume in litre

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4 0
3 years ago
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I believe it’s cold receptor
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2 years ago
This is a specific type of dipole-dipole force that exists between molecules with hydrogen atoms and molecules with nitrogen, ox
RoseWind [281]
Answer:  This description refers to:  "hydrogen bonding" .
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<u>  Hydrogen bonding  </u> is a specific type of "dipole-dipole force" that exists <u /><em><u>between</u> </em> [molecules with hydrogen atoms]  <em><u>and</u> </em> [molecules with nitrogen, oxygen, or fluorine atoms.] .
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5 0
3 years ago
Read 2 more answers
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