3 years ago

Jenny places a strip of pH paper into a solution. When she removes the pH paper, it has turned yellow-green.

Chemistry

2 answers:

Ronch [10]3 years ago

4 0

Jenny puts the ph paper and lines it up PH SCALE to find how strong the solution.

vaieri [72.5K]3 years ago

4 0

Answer: compare the pH paper's color with a chart of colors and pH ranges

Explanation:

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Determine the number of molecules in 43.9 g of carbon tetrachloride

ddd [48]

Answer: There are about 0.28 molecules in 43.9 g of carbon tetrachloride. If you are rounding up, it would be 0.3

Explanation:

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2 years ago

Which of the following is a physical property of a substance?? A. Combustion B. Corrosion C. Tendency to tarnish D. Solubility

Fofino [41]

A physical property does not change the substance.

Solubility would be the answer since all of the rest are changing the substance. They all deal with bonds except solubility.

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3 years ago

Read 2 more answers

Calculate concentration of methylene blue . Give answer in molarity. concentration in ppm=4.8

PSYCHO15rus [73]

Answer:

The molarity of methylene blue is 1.5 × 10⁻⁵ M

Explanation:

When we talk about aqueous solutions, 1 ppm means 1 mg of solute per liter of solution. We need to express this concentration in molarity, which is moles of solute per liter of solution. To convert mass to moles we need the molar mass of methylene blue(MB), which is 320 g/mol.

Then,

$\frac{4.8mgMB}{1Lsolution} .\frac{1gMB}{10^{3}mgMB } .\frac{1molMB}{320gMB} =1.5 \times 10^{-5} M$