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SVETLANKA909090 [29]
3 years ago
10

Which parenting behavior does not increase the probability that offspring will survive? A. Producing milk to feed young B. Guard

ing young from predators C. Protecting young from cold weather D. Abandoning young before eggs are hatched 10 points
Chemistry
1 answer:
horsena [70]3 years ago
8 0
The answer would be D, abandoning young before eggs hatched, due to the fact that the eggs would probably fail to develop correctly as a result of improper care. The other choices would actually increase their chances of survival.
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What's the atomic weight of salt ?
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58.44 g/mol

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58.44 g/mol

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Which best defines partial pressure in a mixture of gases?
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Pressure that is exerted by one gas as if it occupied a container by itself.

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Aqueous acetic acid is neutralized by aqueous potassium hydroxide. True or False
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Answer:

i think its true but I’m not sure

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A 5.00-mL sample of blood was treated with trichloroacetic acid to precipitate proteins. After centrifugation, the resulting sol
Anarel [89]

Explanation:

According to the Beer-lambert' s law,

        Absrobance = absrobptitvity × lenght × concentration

So, if we will plot a graph between absrobance and concentration then we will obtain a straight line

Hence, formula to calculate slope of the graph is as follows.

   The slope of graph = \frac{\text{difference in absrobance at two points}}{\text{difference in concentrations at those points}}

The given data is as follows.

     A_{1} = 0.412 (first point)

     A_{2} = 0.642 (second point)

     C_{1} = 0.240 ppm (first point)

     C_{2} = 0.475 ppm (second point)

Hence, putting these values into the above formula we will calculate the value of slope as follows.

           Slope = \frac{\text{difference in absrobance at two points}}{\text{difference in concentrations at those points}}

                     = \frac{0.642 - 0.412}{0.475 - 0.240}

                      = \frac{0.23}{0.235}

                     = 0.978

It is known that for the graph, line equation can be written as follows.

                       y = mx + c  ........... (1)

where,      C = intercept

                 m = slope

Hence, calculate the value of intercept as follows.

           0.412 = 0.24 \times 0.978 + c

               c = 0.178

As it is given that the absorbance values 0.454 (the y-axis value). Therefore, putting this value into equation (1) we get the following.

                     y = mx + c

                  0.454 = x \times 0.978 + 0.178

                   0.276 = 0.978x

                         x = 0.282 ppm

Thus, we can conclude that the concentration of Pb in the given sample is 0.282 ppm.

3 0
3 years ago
Hurry!! Please
Vanyuwa [196]

c

Explanation:

pay attention in class next time bye hope it helps THE ANSWER IS C bye

7 0
2 years ago
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