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3 years ago

How do scientist determine by using frogs to study their environment

Chemistry

2 answers:

NemiM [27]3 years ago

7 0

To show there environment

Lilit [14]3 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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a fraction collected during distillation ethanol-water what is the mass of ethanol that is present in this fraction

AURORKA [14]

Answer:

80 kg

Explanation:

because the liquid with high boiling point is going to be collected the first

4 0

1 year ago

Identify the only polyatomic ion below that is NOT an oxyanion. Your answer: A Cyanide B Nitrate C Hydroxide D Sulfate

DochEvi [55]

Answer:

Cyanide

Explanation:

Molecular Structure of Each Answer

A: CN-

B: NO3-

C: OH-

D: SO4 2-

As you can see, only A (Cyanide) is the only compound that does not contain oxygen, meaning it is NOT an oxyanion.

7 0

3 years ago

Which temperature in Celsius (°C) does this thermometer show? –8° 0° 25° 32°

natka813 [3]

Answer:

0° Celsius

Explanation:

The thermometer shows 0° Celsius which corresponds to 32° F.

3 0

3 years ago

A solution contains 0.021 M Cl and 0.017 M I. A solution containing copper (I) ions is added to selectively precipitate one of t

lidiya [134]

Answer: Copper (I) iodide will precipitate first.

Explanation:

We are given:

$K_{sp}$ of CuCl = $1.0\times 10^{-6}$

$K_{sp}$ of CuI = $5.1\times 10^{-12}$

Concentration of $Cl^-\text{ ion}=0.021M$

Concentration of $I^-\text{ ion}=0.017M$

Solubility product is defined as the product of concentration of ions present in a solution each raised to the power its stoichiometric ratio.

For CuCl:

$K_{sp}=[Cu^+][Cl^-]$

Putting values in above equation, we get:

$1.0\times 10^{-6}=[Cu^+]\times 0.021$

$[Cu^+]=\frac{1.0\times 10^{-6}}{0.021}=4.76\times 10^{-5}M$

Concentration of copper (I) ion = $4.76\times 10^{-5}M$

For CuI:

$K_{sp}=[Cu^+][I^-]$

Putting values in above equation, we get:

$5.1\times 10^{-12}=[Cu^+]\times 0.017$

$[Cu^+]=\frac{5.1\times 10^{-12}}{0.017}=3.00\times 10^{-10}M$

Concentration of copper (I) ion = $3.00\times 10^{-10}M$

For the precipitation of copper (I) ions, we need less concentration of copper (I) ions. So, copper (I) iodide will precipitate first.

7 0

3 years ago

Comparing the energy and particle motion of the four states of matter, rank them from most energy to least energy.

julsineya [31]

Answer:

I believe it's plasma, solid, liquid, gas.

Explanation:

<h2>plasma and solids consist of lots, one jumbled, one together. liquid is still quite a bit, and gas is everywhere but there isn't much in one.</h2>

7 0

1 year ago