Inna K.

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Psychology

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Question:

Sasha has noticed that she is able to stay focused on her studying if she puts m&m's at the end of each page. What kind of motivation does Sasha have for studying?

Inna K.

Answer:

Sasha is extrinsically motivated, which means she needs a reward to be present at every stage of her studying. If Sasha was intrinsically motivated she would not need a reward to visible at the current time and she would be able to study knowing that a good grade on her exam is satisfactory.

Basic Chemistry

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Question:

If you have a gas that fills up a 2 liter container at 1 atmosphere pressure and room temperature (25 C), how many moles of gas do you have?

Inna K.

Answer:

This problem is solved using the ideal gas law, which is PV = nRT where P is pressure, V is volume, n is moles, R is the gas constant, and T is the temperature. We have all the right units given in the problem except the temperature which needs to converted from Celsius to Kelvin. We plug in the information into the equation: (1)(2) = n(0.0821)(25 + 273) Simplify to get 2 = 24.4658n Divide by 24.4658 on both sides n = 0.0817 moles of gas

Biology

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Question:

Mary was looking at a DNA sequence read out that told her she has 35% cytosine in her sample, what percentages of thymine, guanine, and arginine does she have?

Inna K.

Answer:

Since she has 35% C in her sample, that means she should have an equivalent amount of G since their pair together in the double helix. So, 35 + 35 = 70%. This means Mary has a total of 30% of A and T in her sample, to get the percentage of just T or A we divide by 2. So, Mary has 15% of A and 15% of T in her sample.

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