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2 years ago

The reaction of aluminum metal with oxygen gas typically produces the product with the formula A) Al2O B) Al2O3 C) Al3O2 D) AlO

Chemistry

2 answers:

Ierofanga [76]2 years ago

5 0

<u>Answer:</u> The correct answer is $Al_2O_3$

<u>Explanation:</u>

Aluminium is the 13th element of the periodic table with electronic configuration of $1s^22s^22p^63s^23p^1$

This element looses 3 electrons and shows an oxidation state of +3.

Oxygen is the 8th element of the periodic table with electronic configuration $1s^22s^22p^4$

This element will gain 2 electrons and shows an oxidation state of -2.

By criss-cross method, the oxidation state of aluminium and oxygen gets revered and they form the coefficients of the compound.

Hence, the compound formed will have the chemical formula of $Al_2O_3$

Marat540 [252]2 years ago

3 0

B because Al is +3 and O is -2

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2. In the reaction NO + NO2 ⇌ N2O3, an experiment finds equilibrium concentrations of [NO] = 3.8 M, [NO2] = 3.9 M, and [N2O3] =

notsponge [240]

Kc= concentration of product divided by concentration of reactant
NO + NO2 ----> N2O3

Kc =(N2O3) / (No)(NO2)

Kc= ( 1.3 )/{ (3.9)(3.8) }

Kc=0.088 ( answer B)

4 0

3 years ago

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What is the mass (in grams) of 9.27x1024 molecules of methanol(CH3OH)

garri49 [273]

Moles of methanol = 9.27x10^24/6.02x10^23 = 15.398 moles.

Mass of methanol = moles of methanol x molar mass of methanol
= 15.398 x 32.042
= 493.38 grams.

Hope this helps!

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3 years ago

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6. What does the symbol AH stand for?

Vesnalui [34]

the heat of reaction for a chemical reaction

4 0

3 years ago

HELP! I WILL GIVE BRAINLIST!

Dominik [7]

Answer:

carbon

Explanation:

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2 years ago

Two hydraulic cylinders are connected. If the diameter of one piston is twice the other, the how does the pressure experienced b

Aneli [31]

Answer:

They experience the same pressure

Explanation:

To answer this question, we recall Pascal's, Law Pascal's law states that an increase in pressure at a point in a confined cylinder containing a fluid, there is also an equal increase at all other points in that cylinder.

According to Pascal's law the pressure if the pressure expereienced by the larger diameter piston increases, the pressure experienced by the smaller diameter piston also increases by the same amount

However considering that pressure = Force/area F1/A1 =F2/A2

thus where A1 = πD²÷4 and A2 = πD²÷ 16 we have

we have F1×4/πD² = F2×16/πD² or F1 = 4× F2

They experience the same pressure but the larger cylinder delivers four times the force transmitted from he outside to the smaller cylinder

7 0

3 years ago