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myrzilka
19 days ago
6

Aluminum has a specific heat of 0.902 j/gC. How much heat is lost when a piece of aluminum with a mass of 23.984 g cools from a

temperature of 415 degrees to 22 degrees?
Chemistry
1 answer:
Anarel [2.6K]19 days ago
8 0
The heat exchange is quantified as Q = -8501.99 j. The specific heat for aluminum is listed at 0.902 j/g.°C with a sample mass of 23.984 g. The sample's temperature drops from 415°C to 22°C.
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The electron configuration of an element is 1s22s22p4. Describe what most likely happens when two atoms of this element move tow
castortr0y [2808]

Answer:

Cuando dos átomos se acercan entre sí, se genera un compuesto al compartir pares de electrones que cada uno de los átomos aporta, permitiéndoles alcanzar los 8 electrones de valencia (octeto) en su capa externa.

Explanation:

La configuración electrónica del elemento puede escribirse de la siguiente manera;

1s²2s²2p⁴

La configuración electrónica dada es equivalente a la del oxígeno, por lo tanto, tenemos;

El número de electrones en la capa de valencia = 2 + 4 = 6 electrones

Por consiguiente, cada átomo necesita 2 electrones para completar sus 8 electrones (octeto) en la capa externa.

Al acercarse los dos átomos, reaccionan y se combinan para formar un compuesto al compartir 4 electrones, 2 de cada átomo, de modo que cada átomo obtenga 2 electrones adicionales en su órbita externa en el nuevo compuesto y así se logre la configuración estable de octeto para cada uno de los átomos en el compuesto recién formado.

4 0
1 month ago
Read 2 more answers
A sample of H2SO4 contains 2.02 g of hydrogen, 32.07 g of sulfur, and 64.00 g of oxygen. How many grams of sulfur and grams of o
VMariaS [2753]
Analyzing the formula for sulfuric acid reveals the molar proportions:

H: S: O
2: 1: 4

Next, we need to convert the provided mass of hydrogen into moles, calculated by:

Moles = mass / Mr
Moles = 7.27 / 1
Moles = 7.27

Thus, the number of moles for each element are:

S = 7.27 / 2 = 3.64 moles
O = 7.27 * 2 = 14.54 moles

Subsequently, the masses for sulfur and oxygen are:
S = 32 * 3.64 = 116.48 grams
O = 16 * 14.54 = 232.64 grams 
7 0
1 month ago
a 0.5678 of KHP required 26.64cm³ of NaOH to complete neutralization.calculate the molarity of the NaOH solution​
lions [2696]

Answer:

Explanation:

0.5678 G        X GRAMS

KHC8H4O4 + NaOH = NaKC8H4O4 + H2O

1 MOL               1 MOL

0.5678G X 204G/MOL = 0.00278 MOL KHC8H4O4

0.00278 MOL KHC8H4O4 X 1 MOLE NaOH/1 MOLE  KHC8H4O4=0.00278 MOL NaOH

0.00278 MOL NaOH/26.26ml=0.106 molar

4 0
25 days ago
If angle ABE = 2n + 7 and angle EBF=4n-13,<br>find angle ABE.​
VMariaS [2753]

Answer:

Angle ABE measures 27°.

Explanation:

Refer to the attached diagram related to this question.

The given values are ∠ABE=2n+7 and ∠EBF=4n-13.

Clearly seen in the diagram, ∠ABE and ∠EBF are equal in measure.

m\angle ABE=m\angle EBF

2n+7=4n-13

Move variable components to one side of the equation.

7+13=4n-2n

20=2n

Split both sides by 2.

10=n

The solution for n arrives at 10.

The next step is to calculate ∠ABE.

\angle ABE=2(10)+7=20+7=27

Consequently, the measurement of angle ABE is 27°.

4 0
1 month ago
The ions Ca2+ and PO43- form salt with the formula
Alekssandra [2787]

Ca3(PO4)2 is the correct formula.

7 0
21 day ago
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