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Igoryamba
3 years ago
9

true or false : determining the source and motive of an ad for a health product will helph you decide whether the ad is a reliab

le source of health infomation
Biology
1 answer:
yuradex [85]3 years ago
4 0
True because if the ad was put out by the company it is most likely to be fake so the answer is true hope i helped plz give brainlyest
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Which of the following is not a negative consequence of upward urban growth?
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Answer:

C

Explanation:

all of them have negative effects on the enviroment as a whole but C gives no reason why it would be a consequence

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3 years ago
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Help please I don’t know this stuff
ivann1987 [24]
The correct answer is option B. A and B only
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Let's say that the monkey's Amino Acid sequence was the following. Use the amino acid sequence, and the table below to figure ou
julsineya [31]

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3 years ago
A certain buffer is made by mixing a weak acid HA and its conjugate base A–. When HA is present at a concentration of 0.5 mM and
MAVERICK [17]

Answer:The ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02 is 0.69

Explanation:

The dissociation constant for formic acid = K_a=1.8\times 10^{-4}

Concentration of HA= 0.5 mM

Concentration of A^-= 0.1 mM

pH = 6.16

First we have to calculate the value of K_a.

Using Henderson Hesselbach equation :

pH=pK_a+\log \frac{[A^-}{[HA]}

Now put all the given values in this expression, we get:

6.16=pK_a+\log (\frac{[0.1]}{0.5})

pK_a=6.86

To calculate the ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02.

Using Henderson Hesselbach equation :

7.02=6.86+\log \frac{[A^-]}{[HA]}

7.02=6.86+\log \frac{[A^-]}{[HA]}

\frac{[A^-]}{[HA]}=1.44

\frac{[HA]}{[A^-]}=0.69

Thus the ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02 is 0.69

7 0
3 years ago
50 points + brainliest <br> WRONG ANSWERS WILL BE REPORTED
Vsevolod [243]

Answer:

i.  (answer is in the file I attached)  

ii. underground parts of the plants are thick , fleshy and swollen because they store food in the form of starch.

iii. Spines that have been converted into leaves. These prevent water loss by reducing surface area. The spines help defend the cacti from predatory animals. To decrease water loss due to evaporation, the cuticle is very thick and waxy.

iv. this plant is called a water lettuce it's leaves are modified to form modified to form hydrophyte They are aquatic plants that have evolved to thrive in water. This is capable of comprehending with aquatic macrophyte, which will be entirely submerged in water and in some circumstances allowed to float on the water's surface.  

hope this helps :)

7 0
3 years ago
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