4 years ago

How do scientist determine by using frogs to study their environment

Chemistry

2 answers:

NemiM [27]4 years ago

7 0

To show there environment

Lilit [14]4 years ago

6 0

They use frogs because it easy to get and shows what is going on by what they eat what happened to them and other things.

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When an experiment is replicated how should the results of the two experiments compare

Valentin [98]

The results should be very similar if done correctly. There could always be room for error and they can differ. But if they differ too much, something is most likely wrong. :)

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4 years ago

Calculate the mass of water producd from the reaction of 126g of pentaboron noahydride with 192g of moleculAR OXYGEN

Sindrei [870]

Answer:

81.08g of H $_{2}$ O will be produced.

Explanation:

Write down the balanced chemical equation:

$B_5H_9 + O_2$ ⇒ $B_2O_3+H_2O$

$2B_5H_9+12O_2$ ⇒ $5B_2O_3+9H_2O$

Determine the limiting reagent:

$B_5H_9$ :- 126/63.12646 = 1.995993 mol

1.995993/2 = 0.9979965

$O_2$ :- 192/31.9988 = 6.000225 mol

6.000225/12 = 0.50001875

Therefore, $O_2$ , is the limiting reagent.

Use stoichiometry ratios to determine the number of moles of water produced:

$O_2$ : $H_2O$

12 : 9

6.000225 : 4,500168756328362

Use the mole formula to calculate the mass of water produced:

$n=\frac{m}{M} \\m=nM\\m=(4.500168756328362)(18.01528)\\m=81.08g$

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3 years ago

Write the chemical formula for the anion present in the aqueous solution of cuso4.

ki77a [65]

SO4 -2, or Sulfate

Hope this helps! :)

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3 years ago

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In an electrolytic cell, the electrode that acts as a source of electrons to the solution is called the __________; the chemical

Artyom0805 [142]

Answer:

D. cathode; reduction

Explanation:

<em>Hope this helps~</em>

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3 years ago

4 wings one tail what am i

Karo-lina-s [1.5K]

Only possible answer i think there is its a dragonfly jas 4 wings 1 tail

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3 years ago

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