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Rudiy27
3 years ago
8

Need help! Don’t understand

Chemistry
1 answer:
shtirl [24]3 years ago
8 0
Bro honestly I don’t understand either
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La formula quimica de la molecula de agua H20 , si H = 1 gramos y O = 16 gramos . Cual es su composicion porcentual ? 88,88 % de
vesna_86 [32]

Answer:

88,88 % de O y 11,11 % de H

Explanation:

La composición porcentual se define como la masa que hay de cada mol de átomo en 100g. Las moles de agua en 100g son:

<em>Masa molar agua:</em>

2H = 2*1g/mol = 2g/mol

1O = 1*16g/mol = 16g/mol

Masa molar = 2 + 16 = 18g/mol

100g H2O * (1mol / 18g) = 5.556 moles H2O.

Moles de hidrógeno:

5.556 moles H2O * (2mol H / 1mol H2O) = 11.11 moles H

Moles Oxígeno = Moles H2O = 5.556 moles

La masa de hidrógeno es:

11.11mol * (1g/mol) 11.11g H

La masa de oxígeno es:

5.556 mol * (16g / 1mol) = 88.89g O

Así, el porcentaje de O es 88.89% y el de H es 11.11%. La opción correcta es:

<h3>88,88 % de O y 11,11 % de H</h3>
7 0
3 years ago
If an iron atom loses two electrons, the name of the iron ion is
adoni [48]
If iron atom looses 3 electrons, it forms Fe+3 (ferric) and if iron looses 2 electrons, it forms Fe+2(ferrous). Hope this helps!
5 0
3 years ago
Read 2 more answers
3. Rebecca puts her backpack on a fan cart and turns the fan on. She then measures the speed each second afterward. At 10 second
Dmitrij [34]

Answer:

u just have to multiply 20x12 because its tells ya how fast the cart will be moving at 12 sec.

Explanation:because its tells ya how fast the cart will be moving at 12 sec.

7 0
3 years ago
Which of the elements below has the greatest electronegativity? <br> He <br> F <br> Fr <br> Rn
Law Incorporation [45]

F.
it's the greatest electron "hogger"
as you get closet to it, the stronger the electro negitivity.
He is halogen : they don't like to gain electrons. they are already stable.

Fr and Rn
are metals as far is I can remember. they would prefer losing electrons.
3 0
3 years ago
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Why do scientists study the natural world to find solutions to human problems?
Vlad1618 [11]

5e earth holds many answers to things we don’t know about.

5 0
3 years ago
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