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3 years ago

Which methods will help you properly identify ph With indicated paper?check all that apply

Chemistry

2 answers:

notka56 [123]3 years ago

7 0

Answer:

A, C, D

Explanation:

The rest of the answers too:)

VashaNatasha [74]3 years ago

5 0

Answer: Dip the pH paper into each test tube and lay it on the table to let it change color. Use a transfer pipet to remove a few drops from the solution to drop onto the paper. Wait a minute or so before reading color. Use the same piece of indicator paper for each solution to conserve paper.

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Which argument best explains the charge of an atomic nucleus?

xeze [42]

The answer is "An atomic nucleus is positively charged because it is composed of protons". An atomic nucleus actually contains nucleons which are made up of both protons and neutrons. Since neutrons are neutral or have no charge, the charge of an atomic nucleus mainly relies on the positive charge of the protons.

6 0

3 years ago

Read 2 more answers

Buffers are substances that help resist shifts in pH by Question 10 options: 1) releasing H in acidic solutions. 2) donating H t

ehidna [41]

Answer:

5) donating H to a solution when they have been depleted and accepting H when they are in excess.

Explanation:

A buffer solution is a solution that undergoes a negligible change in pH in addition of moderate quantities of acid or alkali. In other words, a buffer solution is one that resists a change in pH on addition or dilution of small amounts of acids or alkalis.

So, from the given question:

Buffers are substances that help resist shifts in pH by donating H to a solution when they have been depleted and accepting H when they are in excess.

8 0

3 years ago

I've decided that i still want to have some orange juice

lina2011 [118]

Answer:

Oh thats great..

But I hate juice :(

6 0

3 years ago

The hybridization associated with the central atom of a molecule in which all the bond angles are 180° is ____.

enot [183]

Answer:

Sp hybrid

Explanation:

Sp is linear I n shape

7 0

4 years ago

Methyl salicylate (oil of wintergreen) is prepared by heating salicylic acid, , with methanol, . In an experiment, 1.60 g of sal

bekas [8.4K]

Answer:

90.71%

Explanation:

From the equation of reaction:

$C_7H_6O_3 + CH_4O --> C_8H_8O_3$

1 mole of salicylic acid requires 1 mole of methanol in order to produce 1 mole of methyl salicylate.

mole = mass/molar mass

1.6 g of salicylic acid = 1.6/138.121 = 0.012 moles

15 g of methanol = 15/32.04 = 0.47 moles

Salicylic acid is the limiting reagent and hence, 0.012 moles of methyl salicylate would be produced according to the mole ratio above.

0.012 moles of methyl salicylate = 0.012 x 152.1494 = 1.83 g

The theoretical yield of methyl salicylate is 1.83 g while the actual yield is 1.66 g.

Percentage yield = actual yield/theoretical yield x 100%

1.66/1.83 x 100% = 90.71%

7 0

3 years ago