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3 years ago

How many mL of 2.50% glucose solution are needed to obtain 0.500g glucose

Chemistry

1 answer:

mel-nik [20]3 years ago

7 0

To determine the volume of the solution given the amount of solute, we need the concentration of the solute. As we can see the given percent are in units of mass per volume. We calculate as follows:
.0250 = .500 / Volume of solutionVolume of solution = 20 mL

Hope this answers the question.

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3 years ago

Jacques Charles and Guy-Lussac were influenced by the earlier gas research in the 1600s by ____.

mario62 [17]

Answer:

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3 years ago

Calculate the pH of the solution:<br> [OH-] = 1x10^-11M<br> a.11.0<br> b.12.0<br> c.2.7<br> d.3.0

Veronika [31]

p [OH-] = -log[OH-]= -log ( 1x10^-11M) = 11

we know that

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so p[H+] = 14- p[OH-] = 14- 11 = 3

pH = 3, answer

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3 years ago

How many grams are in 9.05 x 1023 atoms of silicon?

Sergeu [11.5K]

Explanation:

Number of moles(n)=Number of atoms(N)/Avogadro's constant.

Avogadro's constant=6.02×10²³

so we have

n=9.05×10²³/6.02×10²³

n=1.0503moles.

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mass=1.0503×28

mass=29.4084g

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3 years ago

What is the specific activity (in Bq/g) if 1.07 kg of an isotope emits 3.77X10⁷β⁻ particles per minute?

raketka [301]

Specific activity is the activity per unit mass of a radionuclide and is a physical property of that radionuclide. Activity is a quantity (for which the SI unit is the becquerel) related to radioactivity, and is defined as the number of radioactive transformations per second that occur in a particular radionuclide.

How do you find the specific activity of an isotopes?

Activity = λN.
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= 3 x 1011 atoms/sec I-131.
= 3 x 1011 dps I-131.

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Learn more about specific activity of isotopes here:

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1 year ago