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4 years ago

Question 17 of 25

Chemistry

1 answer:

77julia77 [94]4 years ago

8 0

Answer:

Why would it be false? That would be a great magic act.

Explanation:

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Valnece electrons of Zn

Nady [450]

This means that neutral zinc atom has a total of 30 electrons surrounding its nucleus. To see how many of these electrons are valence electrons, write the electron configuration of a neutral zinc atom. Notice that the outermost shell, which for zinc is the fourth shell, n=4, has two electrons. Hope this helps. :)

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3 years ago

1. Explain how you would make 550 ml of a 0.15 M NaOH solution. an

Leona [35]

Add 3.3g of NaOH to 550 mL of water.

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4 years ago

A galvanic (voltaic) cell has the generic metals X and Y as electrodes. X is more reactive than Y , that is, X more readily reac

koban [17]

Answer:

(a) X electrode

(b) Y electrode

(d) X electrode

(e) Y electrode

Explanation:

A galvanic (voltaic) cell has the generic metals X and Y as electrodes. X is more reactive than Y, that is, X more readily reacts to form a cation than Y does.

In the X electrode occurs the oxidation whereas in the Y electrode occurs the reduction.

Oxidation: X(s) → X⁺ⁿ(aq) + n e⁻

Reduction: Y⁺ˣ(aq) + x e⁻ → Y(s)

Classify the descriptions by whether they apply to the X or Y electrode.

(a) anode. Is where the oxidation takes place (X electrode).

(b) cathode. Is where the reduction takes place (Y electrode).

(c) electrons in the wire flow toward. Electrons in the wire flow toward the cathode (Y electrode).

(d) electrons in the wire flow away. Electrons in the wire flow away from the anode (X electrode).

(e) cations from salt bridge flow toward. Cations from the salt bridge flow toward the cathode (Y electrode) to maintain the electroneutrality.

5 0

3 years ago

A sample of chemical X is found to contain 5.0 grams of oxygen, 10.0 grams of carbon, and 20.0 grams of nitrogen. The law of def

frozen [14]

Answer: 75 grams sample of chemical X should contain 21.43 grams of carbon

Explanation: The law of definite proportion states that a given chemical compound always contains its component elements in fixed ratio.

From the question, chemical X contains 5.0 grams of oxygen, 10.0 grams of carbon, and 20.0 grams of nitrogen.

Sum up the masses

5.0g + 10.0g + 20.0g = 35.0g

This means, 10.0 grams of carbon are present in 35.0 grams of chemical X.

Now, to the determine the mass of carbon that 75 gram sample of chemical X should contain,

According to the law of definite proportion, the component elements of a given chemical compound are in fixed ratio. Therefore,

If 35.0g of chemical X contains 10.0g of carbon

Then, 75 g of chemical X will contain

(75 × 10) / 35 g

= 21.43 grams

Hence, 75 grams sample of chemical X should contain 21.43 grams of carbon.

4 0

3 years ago

Read 2 more answers

What is a promblem based on charles' law?

LUCKY_DIMON [66]

Answer:

You will never know the exact volume with charles law

Explanation:

Doubling the temperature of gas doubles its volume, so long as the pressure and quantity of the gas are unchanged.

5 0

4 years ago

Read 2 more answers