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1 year ago

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A 3.5 kg iron shovel is left outside through the winter. The shovel, now orange with rust, is rediscovered in the spring. Its ma

ss is 3.7 kg. How much oxygen combined with the iron?

1 answer:

Anton [14]1 year ago

8 0

Answer:

a

Explanation:

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The pressure of a 609.64 gram sample of F2 in a 88.84 L container is measured to be 2770.96 torr. What is the temperature of thi

Oxana [17]

Answer : The temperature of the gas is, 245.9 K

Explanation :

To calculate the temperature of gas we are using ideal gas equation:

$PV=nRT\\\\PV=\frac{w}{M}RT$

where,

P = pressure of gas = 2770.96 torr = 3.646 atm

Conversion used : (1 atm = 760 torr)

V = volume of gas = 88.84 L

T = temperature of gas = ?

R = gas constant = 0.0821 L.atm/mole.K

w = mass of gas = 609.64 g

M = molar mass of $F_2$ gas = 38 g/mole

Now put all the given values in the ideal gas equation, we get:

$(3.646atm)\times (88.84L)=\frac{609.64g}{38g/mole}\times (0.0821L.atm/mole.K)\times (T)$

$T=245.9K$

Therefore, the temperature of the gas is, 245.9 K

4 0

1 year ago

Which statements are true of the electron cloud model? Check all that apply. It is also known as the planetary model. It is cons

barxatty [35]

Answer:

-It is considered the modern atomic model.

-It describes the probable locations of the electrons

Explanation:

edge 2020

8 0

1 year ago

Read 2 more answers

Draw the Lewis structure (including resonance structures) for diazomethane (CH2N2)(CH2N2). For each resonance structure, assign

Tanya [424]

Answer : The Lewis-dot structure and resonating structure of $CH_2N_2$ is shown below.

Explanation :

Resonance structure : Resonance structure is an alternating method or way of drawing a Lewis-dot structure for a compound.

Resonance structure is defined as any of two or more possible structures of the compound. These structures have the identical geometry but have different arrangements of the paired electrons. Thus, we can say that the resonating structure are just the way of representing the same molecule.

First we have to determine the Lewis-dot structure of $CH_2N_2$ .

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is, $CH_2N_2$

As we know that carbon has '4' valence electrons, nitrogen has '5' valence electrons and hydrogen has '1' valence electrons.

Therefore, the total number of valence electrons in $CH_2N_2$ = 4 + 2(1) + 2(5) = 16

Now we have to determine the formal charge for each atom.

Formula for formal charge :

$\text{Formal charge}=\text{Valence electrons}-\text{Non-bonding electrons}-\frac{\text{Bonding electrons}}{2}$

For structure 1 :

$\text{Formal charge on H}=1-0-\frac{2}{2}=0$

$\text{Formal charge on H}=1-0-\frac{2}{2}=0$

$\text{Formal charge on C}=4-2-\frac{6}{2}=-1$

For structure 2 :

$\text{Formal charge on H}=1-0-\frac{2}{2}=0$

$\text{Formal charge on H}=1-0-\frac{2}{2}=0$

$\text{Formal charge on C}=4-0-\frac{8}{2}=0$

8 0

2 years ago

Plseas help Calculate the amount of moles in 57.6 Liters of Carbon Dioxide.

slavikrds [6]

Convert 57.6 L to dm3 and divide it by 24

8 0

1 year ago

Chromium (III) forms a complex with diphenylcarbazide whose molar absorptivity is 4.17x104 at 540 nm.

son4ous [18]

Answer:

3.00 cm

Explanation:

The absorbance can be expressed using <em>Beer-Lambert's law</em>:

A = ε*b*c

Where ε is a constant for each compound, b is the optical path, and c is the molar concentration of the compound.

Now we <u>match the absorbance values for both solutions</u>, because we want the absorbance value to be the same for both solutions:

A = ε * 1.00 cm * 7.68x10⁻⁶M = ε * b * 2.56x10⁻⁶ M

And <u>solve for b:</u>

ε * 1.00 cm * 7.68x10⁻⁶M = ε * b * 2.56x10⁻⁶ M

1.00 cm * 7.68x10⁻⁶M = b * 2.56x10⁻⁶ M

b = 3.00 cm

5 0

1 year ago