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kow [346]
3 years ago
9

The percent by mass of copper in CuBr2 is

Chemistry
2 answers:
xxTIMURxx [149]3 years ago
8 0

Answer: The mass percent of copper in CuBr_2 is 28.45 %.

Explanation:

In CuBr_2, there are 1 copper atom and 2 bromine atoms.

To calculate the mass percent of element in a given compound, we use the formula:

\text{Mass percent of copper}=\frac{\text{Mass of copper}}{\text{Molar mass of copper bromide}}\times 100

Mass of copper= 63.54 g

Mass of copper bromide = 223.37 g

Putting values in above equation, we get:

\text{Mass percent of copper}=\frac{63.54}{223.37}\times 100=28.45\%

Hence, the mass percent of copper in copper bromide is 28.45 %.

Sunny_sXe [5.5K]3 years ago
4 0
Hope this helps you.

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Answer: Do you take Ms. Reyes

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4 0
3 years ago
Read 2 more answers
A photon of light possesses 5 x 10^-19 J of energy. Calculate its frequency
saveliy_v [14]

Answer:

The frequency of photon is 0.75×10¹⁵ s⁻¹.

Explanation:

Given data:

Energy of photon = 5×10⁻¹⁹ J

Frequency of photon = ?

Solution:

Formula;

E = hf

h = planck's constant = 6.63×10⁻³⁴ Js

5×10⁻¹⁹ J =  6.63×10⁻³⁴ Js ×f

f =  5×10⁻¹⁹ J / 6.63×10⁻³⁴ Js

f = 0.75×10¹⁵ s⁻¹

The frequency of photon is 0.75×10¹⁵ s⁻¹.

4 0
3 years ago
Dos moléculas de Clorato de Potasio en estado sólido, al aplicarle calor se descompone en dos moléculas de Cloruro de Potasio en
DedPeter [7]

Answer:

2KClO3 (s) -------> 2KCl (s) + 3O2 (g)

Explanation:

Una ecuación de reacción química es una representación simbólica de lo que sucede en un recipiente de reacción.

Al escribir la ecuación de reacción química para una reacción particular, se utilizan los símbolos químicos de todas las especies involucradas.

Por la reacción. en el cual dos moléculas de Clorato de Potasio en estado sólido, al aplicar calor se descompone en dos moléculas de Cloruro de Potasio en estado sólido y tres moléculas diatómicas de Oxígeno en estado gaseoso, la ecuación de reacción se escribe así;

2KClO3 (s) -------> 2KCl (s) + 3O2 (g)

La regla para escribir ecuaciones de reacción química balanceada es que el número de átomos de cada elemento en el lado derecho de la ecuación de reacción debe ser el mismo que el número b de átomos del mismo elemento en el lado izquierdo de la ecuación de reacción.

Si realizamos un conteo de átomos simple en ambos lados de la ecuación de reacción, la regla se cumple

7 0
3 years ago
What is the element?
irakobra [83]

Helium  - 2 protons

lithium - 3

beryllium - 4

Carbon has 6 protons

5 0
3 years ago
Please put the molecular compound names for these compound formulas. Answer as many as you want. Thanks
never [62]

Answer:

Explanation:

N₂O₄

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SO₃

Sulfur trioxide

NO

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nitrogen dioxide

As₂O₅

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PCl₃

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CCl₄

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H₂O

Water

SeF₆

Selenium hexafluoride

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5 0
4 years ago
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