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Debora [2.8K]
3 years ago
14

Which is the most important characteristic in determining an elements chemical properties

Chemistry
1 answer:
Mnenie [13.5K]3 years ago
8 0

Answer:

The number of electrons I think

Explanation:

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How many grams of glucose are needed to prepare 144.3 mL of a 1.4%(m/v) glucose solution?
Montano1993 [528]

Answer:

2.0202 grams

Explanation:

1.4% (m/v) glucose solution means: 1.4g glucose/100mL solution.

so ?g glucose = 144.3 mL soln

Now apply the conversion factor, and you have:

?g glucose = 144.3mL soln x (1.4g glucose/100mL soln).

so you have (144.3x1.4/100) g glucose= 2.0202 grams

6 0
3 years ago
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What is the most soluble salt of the following set? What is the most soluble salt of the following set?
DiKsa [7]

Answer:

(c) AgCN\ (K_{sp} =6.0\times 10^{-17})

Explanation:

The solubility product of a solid is the amount of solid dissociates into its respective ions in the solution. Thus more the value of the Ksp, the more is the salt soluble in the solvent.

So,  Given that:-

Sn(OH)_2\ (K_{sp} =1.6\times 10^{-19})

Al(OH)_3\ (K_{sp} =1.9\times 10^{-33})

AgCN\ (K_{sp} =6.0\times 10^{-17})

Fe(OH)_3\ (K_{sp} =2.6\times 10^{-39})

The salt having highest value of Ksp is AgCN. So, it is most soluble.

4 0
3 years ago
Systems Working Together
gogolik [260]

Answer:

Explanation:

Food moves through the digestive system with a wave-like motion called peristalsis. Muscles in the walls of the hollow organs contract and relax to cause this movement, which pushes food through the esophagus into the stomach.Apr 25, 2018

4 0
3 years ago
Acetic acid has a heat of fusion of 10.8 kJ/mol and a heat of vaporization of 24.3 kJ/mol. What is the expected value for the he
photoshop1234 [79]

Answer: 35.1 kJ/mol

Explanation:

According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.

According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.

CH_3COOH(s)\rightarrow CH_3COOH(l)    \Delta H_{fusion}=10.8kJ/mol   (1)

CH_3COOH(l)\rightarrow CH_3COOH(g)    \Delta H_{vap}=24.3kJ/mol   (1)

The final reaction is:  

CH_3COOH(s)\rightarrow CH_3COOH(g)  \Delta H_{sub}=?   (3)

By adding (1) and (2)

\Delta H_{sub}=\Delta H_{fusion}+\Delta H_{sub}=+10.8kJ+(+24.3kJ)=35.1kJ

Hence the expected value for the heat of sublimation of acetic acid is 35.1 kJ/mol

6 0
3 years ago
Which is better solar energy or wind energy
ipn [44]

Answer:

solar is better than wind

Explanation:

wind is not always blow in or blowing hard enough and most of day sun shines on us.

7 0
3 years ago
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