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Genrish500 [490]
4 years ago
11

How many moles are in 2.3 grams of phosphorus? :(

Chemistry
1 answer:
tatiyna4 years ago
4 0

Answer:

there are 0.074 moles in 2.3 grams of phosphorus

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which has more kinetic energy, a 5-kg object moving at 5 m/s 1 m off the ground or a 5-kg object at rest 2 m off the ground?
irina1246 [14]

Answer:

Explanation:

Kinetic energy is the energy due to changes in position of a body. It is always with regards to motion of a body.

Potential energy on the other hand is the energy at rest of a body.

To estimate kinetic energy, we use the formula:

      K.E =  \frac{1}{2}m v^{2}

where m is the mass of the body and v is the velocity of the object.

mass is 5kg and velocity is 5ms⁻¹

      K.E =  \frac{1}{2}5 x  5^{2}

      K.E = 62.5J

for the object at rest;

    potential energy is calculated:

    P.E = mgh

where m is the mass, g is the acceleration due to gravity and h is the height

m is 5kg, h is 2 and g is 9.8

    P.E = 5 x 9.8 x 2 = 98J

The moving object has kinetic energy with the object  at rest having potential energy.

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Answer:

The chemical reaction between the citric acid and sodium bicarbonate

Explanation:

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Which is the reason that ionic compounds are brittle?
lisabon 2012 [21]
Ionic bonds are the weakest bonds. 
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Glycolysis is the process by which energy is harvested from glucose by living things. Several of the reactions of glycolysis are
nika2105 [10]

Answer: Reaction A: pi + glucose ⇒ glucose-6-phosphate + H2O ΔG = 13.8 kJ/mol

Reaction B: pi + frutose-6-phosphate ⇒fructose-1,6-biphosphate + H2O ΔG = 16.3kJ/mol

Explanation: ΔG is the representation of the change in Gibbs Free Energy and relates enthalpy and entropy in a single value, which is:

ΔG = ΔH - TΔS

where:

ΔH is enthalpy

T is temperature

ΔS is entropy (measure of the )

It can also predict the direction of the reaction with the conditions of temperature and pressure being constant.

When the change is positive, the reaction is non-spontaneous, which means the reaction needs external energy to occur. If the change is negative, it is spontaneous, i.e., happens without external help.

Analyzing the reaction, we see that reaction A and B have a positive ΔG, while reaction C is negative, so the reaction that are unfavorable or nonspontaneous are <u>reactions A and B</u>.

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