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Mekhanik [1.2K]
2 years ago
15

What is one advantage to using this form of circuit? (AKS 10b) O A.

Chemistry
1 answer:
lions [1.4K]2 years ago
7 0

Answer:

i think A.

Explanation:

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What is the number of Cl atoms in a 784 gram pure sample of NC13?
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Answer:

idk

Explanation:

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5 0
3 years ago
what happen when carbon dioxide is passed through water for short time and for long time?explain with chemical reaction.​
Delicious77 [7]

Answer:

Expert Verified

Explanation:

For short duration: ... When excess of carbon dioxide gas is passed through lime water then the white precipitate calcium carbonate formed first dissolves due to the formation of a soluble salt calcium hydrogen carbonate (Ca(HCO3)2, and the Solution becomes clear again

6 0
3 years ago
Two facts about calorimetry
blagie [28]
The measure of the quantity of heat exchanged. 
Uses many different units of measurements. 
8 0
3 years ago
Why sodium chloride is a poor conductor of electricity in solid state?​
aev [14]

Answer:

Because the electrons in this ionic compound arent free to move and so cannot carry charge. For an iconic compound to conduct electricity it must be a liquid, either in a molten form or dissolved in water.

Explanation:

Is this clear?

5 0
3 years ago
A 1.757-g sample of a / alloy was dissolved in acid and diluted to exactly 250.0 mL in a volumetric flask. A 50.00-mL aliquot of
kondor19780726 [428]

Answer:

78.14% Pb²⁺ and 21.86% of Cd²⁺

Explanation:

The first titration involves the reaction of both Pb²⁺ and Cd²⁺

In the second titration, as the buffer is HCN/NaCN, the Cd²⁺ precipitates as Cd(CN)₂ and the only ion that reacts is Pb²⁺

In the first titration:

<em>Moles EDTA = Moles Pb²⁺ and Cd²⁺:</em>

28.89mL = 0.02889L * (0.06950moles / L) = 2.008x10⁻³ moles in the aliquot. In the sample:

2.008x10⁻³ moles * (250.0mL / 50.0mL) =

0.01004 moles = Pb²⁺ + Cd²⁺ <em>(1)</em>

In the second titration:

19.07mL = 0.01907L * (0.06950mol / L) = 1.325x10⁻³ moles Pb²⁺ in the aliquot. In the sample:

1.325x10⁻³ moles Pb²⁺ * (250.0mL / 50.0mL) =

6.626x10⁻³ moles Pb²⁺

That means the moles of Cd²⁺ are:

0.01004 moles = Cd²⁺ + 6.626x10⁻³ moles Cd²⁺

3.413x10⁻³ moles Cd²⁺

The mass of each ion is:

<em>Cd²⁺ -Molar mass: 112.411g/mol-:</em>

3.413x10⁻³ moles Cd²⁺ * (112.411g / mol) =

0.384g of Cd²⁺

<em>Pb²⁺ -Molar mass: 207.2g/mol-:</em>

6.626x10⁻³ moles Pb²⁺ * (207.2g / mol) =

1.373g of Pb²⁺

The percent mass of each ion is:

1.373g Pb²⁺ / 1.757g = 78.14% Pb²⁺

And:

0.384g of Cd²⁺ / 1.757g * 100 = 21.86% of Cd²⁺

4 0
3 years ago
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