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3 years ago

11

URGENT

1 answer:

pantera1 [17]3 years ago

4 0

Answer:

Option A. Double Replacement

Explanation:

A double displacement reaction is a kind of reaction in which there is an exchange of the ions of the two reactants to form a different products. In the equation, K in KOH displaces H in H3PO4 to form K3PO4 and also, the H combines with OH to form water.

H3PO4+3KOH -> K3PO4+3H20

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ser-zykov [4K]

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3 years ago

Which of the following models give the volume of a molecule?

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Answer:

Space filling model

Explanation:

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4 years ago

Is an amethyst a Silicate or Nonsilicate?

vovikov84 [41]

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3 years ago

How many grams of SO3 are produced when 20.0 g FeS2 reacts with 16.0 g O2 according to this balanced equation

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7 0

3 years ago

Estradiol is a female sexual hormone that causes maturation and maintenance of the female reproductive system. Elemental analysi

Ipatiy [6.2K]

Answer:

The molecular formula of estradiol is: $C_{18}H_{24}O_2$ .

Explanation:

Molar mass of of estradiol = M= 272.37 g/mol

Let the molecular formula of estradiol be $C_xH_yO_z$

Percentage of an element in a compound:

$\frac{\text{Number of atoms of element}\times \text{Atomic mass of element}}{\text{molecular mass of element}}\times 100$

Percentage of carbon in estradiol :

$\frac{x\times 12 g/mol}{272.37 g/mol}\times 100=79.37\%$

x = 18.0

Percentage of hydrogen in estradiol :

$\frac{y\times 1g/mol}{272.37 g/mol}\times 100=8.88\%$

y = 24.2 ≈ 24

Percentage of oxygen in estradiol :

$\frac{z\times 16 g/mol}{272.37 g/mol}\times 100=11.75\%$

z = 2

The molecular formula of estradiol is: $C_xH_yO_z:C_{18}H_{24}O_2$

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3 years ago