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3 years ago

9

4. a student is shown a Diagram which shows gas bubbles being made by water plant that has been exposed to light. which gas is m

ost likely in the bubbles

1 answer:

lisov135 [29]3 years ago

5 0

Carbon dioxide is in the bubbles

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The bones in the front limbs of many mammals are similar in their structures

Olenka [21]

Is this a true or false? If so believe itd be true<span />

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4 years ago

Which things from the image make up the pond community?

olga55 [171]

D because community is also full of abiotic factors

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3 years ago

What volume of a 0.00945-M solution of potassium hydroxicce would be required to titrae 50.00mL of a sample of acid rain with a

Zepler [3.9K]

<u>Answer:</u> The volume of HBr solution required is 130.16 mL

<u>Explanation:</u>

To calculate the concentration of base, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of acid which is $H_2SO_4$

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is $KOH$

We are given:

$n_1=2\\M_1=123\times 10^{-4}M=0.0123M\\V_1=50mL\\n_2=1\\M_2=0.00945M\\V_2=?mL$

Putting values in above equation, we get:

$2\times 0.0123\times 50=1\times 0.00945\times V_2\\\\V_2=130.16mL$

Hence, the volume of KOH solution required is 130.16 mL

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4 years ago

H2O (s) ⇒ H2O What would be the best argument against writing this in the form of a chemical equation?

Goshia [24]

Answer: Since this is merely a Physical Change, it is improper to write it as a chemical equation.

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4 years ago

In a DNA molecule, if 38% of the molecular bases are C (cytosine), what percent of the bases are T (thymine)?

andreyandreev [35.5K]

Answer:

thymine is 19%

Explanation:

Acc to Chargaff's rule, amount of Adenine= amount of Thymine as well as amount of Guanine= amount of Cytosine. Amount left for Thymine and Adenine is 38% now. Since both Adenine and Thymine are, again in equal quantities, so therefore percentage of thymine is 19%.

8 0

4 years ago