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3 years ago

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The symbol for iron is Fe. The chemical symbol for oxygen is O. The formula for iron oxide, a type of rust is Fe2O3. How many ir

on atoms are in one molecule of iron oxide? A. 1
B. 2
C. 3
D. 4

1 answer:

borishaifa [10]3 years ago

5 0

The answer is B 2 Hope it helps

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Evaluate importance:<br> - Why does a patch of garbage in the ocean effect humans on land?

andrew-mc [135]

Why does a patch of garbage in the ocean effect humans on land

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3 years ago

Would a false positive from the reaction between the inoculating loop and hydrogen peroxide

Svetradugi [14.3K]

The false positive from the response of hydrogen peroxide and the immunizing circle would be created by poor specificity. The recipe for specificity is TN/TN+FP. False-positive outcomes can be ascribed to meddling substances in nature where the strips are put away or utilized, for example, hydrogen peroxide (H2O2) or fade (hypochlorite).

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3 years ago

A 8.00 L tank at 26.9 C is filled with 5.53 g of dinitrogen difluoride gas and 17.3 g of sulfur hexafluoride gas. You can assume

alexandr402 [8]

Answer:

$x_{N_2F_2}= 0.415\\\\x_{SF_6}=0.585$

Explanation:

Hello!

In this case, since the mole fraction of both gases in the tank is computed via:

$x_{N_2F_2}=\frac{n_{N_2F_2}}{n_{N_2F_2}+n_{SF_6}} \\\\x_{SF_6}=\frac{n_{SF_6}}{n_{N_2F_2}+n_{SF_6}}$

It means we need to compute the moles of each gas, just as it is shown down below:

$n_{N_2F_2}}=5.53gN_2F_2*\frac{1molN_2F_2}{66.01gN_2F_2} =0.0838molN_2F_2\\\\n_{SF_6}=17.3gSF_6*\frac{1molSF_6}{146.06gSF_6} =0.118molSF_6$

Thus, the mole fractions turn out:

$x_{N_2F_2}=\frac{0.0838mol}{0.0838mol+0.118mol}= 0.415\\\\x_{SF_6}=\frac{0.0838mol}{0.0838mol+0.0838mol}=0.585$

Best regards!

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3 years ago

Arrange the following compounds in decreasing order of acidity from left to right, and explain the reason in less than 90 words.

saveliy_v [14]

Explanation:

More is the electronegativity of atoms attached to the alpha carbon atom more will be the attraction of electron towards it. As a result, release of hydrogen ion will be easier.

Therefore, there will be increased in acidity of the compound.

Since, fluorine, chlorine and bromine are all group 17 elements and fluorine is more reactive than chlorine. On the other hand, chlorine is more reactive than bromine.

Hence, ability to attract the electrons towards itself will be maximum in fluorine and least in bromine.

Therefore, decreasing order of acidity of the given compounds is as follows.

$CF_{3}COOH$ > $CCl_{3}COOH$ > $CBr_{3}COOH$ > $CH_{3}COOH$

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3 years ago

In a molecule of methane, carbon (having four valence electrons) binds to four hydrogen atoms. How many lone pairs of electrons

antiseptic1488 [7]

None. To bind with an hydrogem atom, the carbon needs to ''share'' one of it's valence electron's with the hydrogen's valence electron. Therefore, forming 4 bounds means the carbon atom will share it's 4 valence electrons and there will be no lone electrons.

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