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3 years ago

Read the following story and then answer the questions.

Chemistry

2 answers:

Mice21 [21]3 years ago

6 0

Answer:

sentence 6

Explanation:

A hypothesis is a supposition or proposed explanation that is made by observing such evidence. The hypothesis is the start point of further investigation. The scientific method is demonstrated by the sentences:

Sentence 1 represents the problem, or the research question: why sea water freezes at a lower temperature than fresh water?;

Sentences 2 and 3 represent the initial research;

Sentences 4 and 5 represent the observation;

Sentence 6 is the hypothesis;

Sentences 7, 8 and 9 are the experimental phase, and

Sentence 10 is the theory: hypothesis was tested and proved in the experiment.

Sliva [168]3 years ago

4 0

Place both breaking in a freezer at a temperature

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Water supplies are often treated with chlorine as one of the processing steps in treating wastewater. Estimate the liquid diffus

jekas [21]

Answer:

⇒D_AB= 1.21×10^(-9)

Explanation:

Wike chang equation is given as:

$D_{AB}= \frac{117.3\times10^{-18}\times\(\phi\times M_B)^{0.5}\times T}{\mu\times\nu^{0.6}}$

Where

D_AB= diffusivity of chlorine in water

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ν= 0.0484 for chlorine as solute

M_B = Molecular weight of water

τ= temperature=289 K

μ= viscosity = 1.1×10^{-3}

Now putting these values in the above equation we get

$D_{AB}= \frac{117.3\times10^{-18}\times\(\2.26\times18)^{0.5}\times289}{\1.1\times10^{-3}\times\0.0484^{0.6}}$

⇒D_AB= 1.21×10^(-9)

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Answer:

HC2H3O2

Explanation:

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