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2 years ago

PLZ HELP!!!!!!!!!!!!!

Chemistry

1 answer:

gregori [183]2 years ago

5 0

117.22 g are needed to react with an excess of Fe2O3 to produce 156.2 g of Fe.

Explanation:

Moles of Fe = Mass of Fe in grams / Atomic weight of Fe

= 156.2 / 55.847

Moles of Fe = 2.79.

The ratio between CO and Fe id 3 : 2.

Moles CO needed = 2.79 * (3 / 2)

= 4.185.

To calculate Atomic weight of CO,

Atomic weight of carbon = 12.011

Atomic weight of oxygen= 15.9994

Atomic weight of CO = 12.011 + 15.9994 = 28.01 g / mol.

Mass of CO = 4.185 * 28.01 = 117.22 g.

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State Boyle's, Charles's, and Gay-Lussac's laws using sentences, then equations

dimaraw [331]

Explanation:

1. Boyle's Law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

$P\propto \frac{1}{V}$ (At constant temperature and number of moles)

$P_1\times {V_1}=P_2\times V_2$

2. Charles' Law states that volume is directly proportional to the temperature of the gas at constant pressure and number of moles.

$V\propto T$ (At constant pressure and number of moles

$\frac{V_1}{T_1}=\frac{V_2}{T_2}$

3. Gay Lussac's Law states that tempertaure is directly proportional to the pressure of the gas at constant volume and number of moles of gas

$P\propto T$ (At constant volume and number of moles)

$\frac{V_1}{n_1}=\frac{V_2}{n_2}$

7 0

2 years ago

1. In the first step of the mechanism for this process, a phenoxide anion is generated. This phenoxide anion goes on to act as a

Tju [1.3M]

Answer:

See the explanation

Explanation:

In this case, in order to get an <u>elimination reaction</u> we need to have a <u>strong base</u>. In this case, the base is the phenoxide ion produced the phenol (see figure 1).

Due to the resonance, we will have a more stable anion therefore we will have a less strong base because the negative charge is moving around the molecule (see figure 2).

Finally, the phenoxide will attack the <u>primary carbon</u> attached to the Cl. The C-Cl bond would be broken and the C-O would be produced <u>at the same time</u> to get a substitution (see figure 1).

3 0

3 years ago

How many of each component are shown in the diagram? Check all that apply. one battery two switches two batteries two resistors

VikaD [51]

<h3>In reference to the diagram attached </h3><h3>Answer:</h3>

one battery, two switches, and three light bulbs

Explanation:

A circuit is an arrangement that shows the flow of electrons from a current source such as a battery.

The diagram shows a circuit that contains one battery, two switches, and three light bulbs.
The switches serves to close the circuit when necessary.
The battery supplies current to the circuit.
The light bulbs are used for lighting.