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grin007 [14]
3 years ago
15

If 21.4 grams of hydrogen reacts completely with 120.3 grams of oxyge to form hydrogen peroxide, what percent by mass of hydroge

n in hydrogen peroxide?
Chemistry
1 answer:
gulaghasi [49]3 years ago
5 0

Answer:

In its pure form, it is a very pale blue liquid, slightly more viscous than water. Hydrogen peroxide is the simplest peroxide (a compound with an oxygen–oxygen single bond).

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What effect does supercritical mass have on a nuclear reaction?
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4 years ago
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The molar mass of iron(Fe) is 55.8 g/mol. what is the mass in grams of 2.25 moles of iron?
AnnyKZ [126]

Try this solution:

if 1 mole is 55.8 gr., then 2.25 moles the mass should be 55.8*2.25=125.55 gr.


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7 0
3 years ago
A certain element exists as two different isotopes. 90.50% of its atoms have a mass of 20.00 amu and 9.500% of its atoms have a
Serga [27]

Answer:

20.19 amu.

Explanation:

From the question given above, the following data were obtained:

Isotope A:

Abundance (A%) = 90.5%

Mass of A = 20 amu

Isotope B:

Abundance (B%) = 9.5%

Mass of B = 22 amu

Average atomic mass =..?

The average atomic mass of the element can be obtained as follow:

Average atomic mass = [(Mass of A × A%)/100] + [(Mass of B × B%)/100]

Average atomic mass = [(20 × 90.5)/100] + [(22 × 9.5)/100]

Average atomic mass = 18.1 + 2.09

Average atomic mass = 20.19 amu

Therefore, the average atomic mass of the element is 20.19 amu

6 0
3 years ago
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