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Alex777 [14]
3 years ago
8

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

next to determine the pH of her solution?
Chemistry
1 answer:
Svetllana [295]3 years ago
8 0
Compare it to the chart showing how base or acidic a substance is
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Element M has two isotopes,^104M and ^106M.
snow_lady [41]
To calculate atomic mass, you have to take to weighted average of the isotopes' masses. What that means is M = RA*106 + (1 – RA)*104, where RA is relative abundance expressed in decimal form. If you simplify the right side of that equation, you get M = 2*RA + 104. Doing a little more algebra yields RA = (M –104)/2 = (104.4 – 104)/2 = 0.4 / 2 = 0.2, which is 20%. So the answer is B.
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Which statement is true about sodium hydroxide (NaOH)?
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It's a base because it increases the concentration of hydroxid ions
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Which statements about the operation of an automated micropipettor are true? The volume dial has already been set, do not alter
yanalaym [24]

Answer:

The correct statement is that the point of initial resistance is the level of depression that will fill the pipette with the desired volume of solution.

Explanation:

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The correct statement is that the point of initial resistance is the level of depression that will fill the pipette with the desired volume of solution.

4 0
3 years ago
How many 325mg aspirin tablets can be made from 3628 grams of aspirins ? Need an answer by tonight it’s getting late .
krek1111 [17]

I took the mg and converted it to grams. That gave me .325 grams. I took that and multiplied that by 3628 grams. If I did my math correctly, the answer would be 1179.1. Rounded up, that would be 1179 aspirin tablets.   Hope this helps. :)

4 0
3 years ago
What is the volume of 220 grams of an object with a density of 55g/cm square
AnnyKZ [126]
I'm assuming that you meant 55 g/cm^3. Density=\frac{Mass}{Volume}. This is the definition of density. If you rearrange this equation by multiplying each side of the equation by the volume, you get: (Density)(Volume)=Mass. Divide each side by the density to get: Volume=Mass/Density. Now just plug everything in:
V=220 (grams)/55 (grams/cm^3)=<u>4 cm^3</u>
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3 years ago
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