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2 years ago

PLEASE SOMEONE HELP ASAP: why does alcohol dissolve permanent marker

Chemistry

1 answer:

Volgvan2 years ago

4 0

Explanation:

Isopropyl alcohol is the solvent used in whiteboard markers. When it comes into contact with the permanent marker, the solvent breaks the cohesive force between the ink molecules and the whiteboard by solubilising them (i.e. returning them to solution).

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Are mass vs. density the same

Ierofanga [76]

Mass is the amount of matter in an object. Density is the degree of compactness of a substance

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3 years ago

Define the term chemotherapy.

Ksivusya [100]

I'm not able to understand that what is written in the pic.. As I can't understand this language..

Treatment that uses drugs to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. Chemotherapy may be given by mouth, injection, or infusion, or on the skin, depending on the type and stage of the cancer being treated.

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2 years ago

Read 2 more answers

How many molecules are in 643.21 grams of Mg3(PO4)2?

Eva8 [605]

Answer:

643.21g 1 mol 6.022^23

262.87 g 1 mol

= 1.4735E24 [Mg3(PO4)2]

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2 years ago

What is the ratio strength of 100 ml containing a 1:50 povidone iodine solution diluted to 1000 ml? (answer must be numeric; no

guapka [62]

We are given that:

100 mL total solution with 1:50 povidone iodine solution

This means that there is 1 mL of povidone iodine solution per 50 mL of total solution. Since we are given a total of 100 mL solution, therefore we have an initial amount of:

pure povidone iodine solution = 2 mL

This amount of pure povidone iodine solution is added or diluted (most perhaps with water) to make a total of 1000 mL total solution, therefore the new ratio is:

2:1000 povidone iodine solution

By dividing both sides by 2, this simplifies to

1:500 povidone iodine solution

Answer:

1:500

4 0

3 years ago

Please help with 1 chemistry question thank you!

ale4655 [162]

Here are the CORRECT names and molecular formulas

carbonate: $CO_3^{2-}$
bicarbonate: $HCO_3^{-}$

Choice 1 is incorrect

nitrite: $NO_2^{-}$
nitrate: $NO_3^{-}$

Choice 2 is incorrect

sulfite: $SO_3^{2-}$
sulfide: $S^{2-}$

Choice 3 is incorrect

By process of elimination, you can infer choice 4 is correct.

Actually, choice 4 is the only choice that displays the correct name and formula.

Have an awesome day! :)

7 0

3 years ago