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The answer to this is: C) a factor that may affect an experiment or investigation. This is the best answer. A and B can be eliminated. D describes a controlled variable which is more specific than a scientific variable, thus C is the best answer. It is the best description of just a scientific variable. And, The second one is B: Robert Hooke was a famous scientist who experimented with springs (metal coils). He found that the farther you stretched the spring, the larger the force with which the spring pulled back on you.
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The trait of the dental gap is present in apes but absent in hominins.
<h3>
What do you understand by hominins?</h3>
The term "hominin" refers to a group that includes all living humans, all extinct human species, and all of our direct predecessors (including members of the genera Homo, Australopithecus, Paranthropus, and Ardipithecus). Sahelanthropus, Orrorin, and Ardipithecus are the earliest hominins. Many characteristics that set humans apart from other primates were absent in the ancestors of the human lineage. Sahelanthropus tchadensis from the Chad and Orrorin tugenensis from Kenya are the oldest hominins that are currently known. The skull of Sahelanthropus, which dates to between 6 and 7 mya, is mostly complete, and there are also some additional fragmentary bones.
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I believe that the other person who answers u is right
The correct answer is gamete.
The volume of the ethanol is 6.7 mL
<h3>What is the density of the ethanol?</h3>
We know that density is defined as the ratio of the mass to the volume of an object. We know that the density is said to be an intrinsic property and this means that we can use the density of the object to be able to obtain the kind of object that we are dealing with.
We have the information that the mass of the carbon dioxide that can be obtained from the reaction is about 10 g. We can now use this to obtain the number of moles by the use of the formula;
Number of moles = mass/ molar mass
= 10 g/44 g/mol
= 0.23 moles
From the reaction equation:
1 mole of ethanol produces 2 moles of carbon dioxide
x moles of ethanol produces 0.23 moles of carbon dioxide
x = 0.23 × 1 /2
= 0.115 moles
Mass of ethanol = 0.115 moles × 46 g/mol
= 5.29 g
Volume of the ethanol = mass/density
volume = 5.29 g/0.789 g/mL
= 6.7 mL
Learn more about ethanol;brainly.com/question/250024
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