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1 month ago

El teñido de una camiseta blanca con pintura es un cambio fisico o quimico

Chemistry

1 answer:

Anarel [2.9K]1 month ago

4 0

respuesta: cambio fisico

explicacion: Un cambio químico ocurre cuando se altera la estructura atómica, en este caso, al teñir la camiseta, esta sigue siendo una camiseta sin perder su identidad.

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a movable chamber has a volume of 18.5 L (at temperature of 18.5 C) assuming no gas escapes and the pressure remains constant wh

VMariaS [2998]

Answer:

$39 ^\circ C$

Explanation:

We have:

V₁ = 18.5 L

T₁ = 18.5° C = 273 + 18.5 = 291.5 K

V₂ = 19.8 L

T₂ =?

Pressure remains constant

Applying the ideal gas law

$\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}$

$\dfrac{18.5}{291.5}=\dfrac{19.8}{T_2}$

$T_2 = 312 K$

$T_2 = 312 -273 =39 ^\circ C$

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1 month ago

Compound A reacts with Compound B to form only one product, Compound C, and it's known the usual percent yield of C in this reac

VMariaS [2998]

Response:

1. 16.54 grams.

2. 6.64 grams.

Clarification:

Greetings,

In this situation, the chemical reaction taking place is:

$A+B\rightarrow C$

Thus, based on the provided data, the theoretical yield of C can be determined as:

$m_C^{theoretical}=\frac{12.9g}{0.78}=16.54g$

Additionally, taking into account the principle of conservation of mass, the mass prior to the reaction is equal to the mass following the reaction, hence, the mass of B that was utilized amounts to:

$m_B=m_C-m_A=16.54g-10.0g=6.64g$

Best regards.

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17 days ago

What assumption is being made if scientists conclude that aspartic acid was formed by the prebiological synthesis in the passage

lorasvet [2795]

Answer:

A....

Explanation:

8 0

22 days ago

Read 2 more answers

The next 3 questions will walk you through using the Henderson-Hasselbalch equation for the following question. For each step pr

lions [2927]

Response:

The pKa value is 13.0.

Clarification:

pKa + pKb = 14

For trimethylamine, Kb = 6.3 × $10^{-5}$

Calculating pKb: pKb = - log (6.3 × $10^{-5}$ )

= 1.0

Thus, pKa = 14 - pKb = 14 - 1.0

pKa = 13.0

Verification: The typical range for pKa in weak acids is from 2 to 13.

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1 month ago

Is N2 + H2 →NH4 a balanced chemical equation? Is it obeying the law of conservation of matter?

eduard [2782]

The response is:

No, the equation is not balanced. Neither the Nitrogen (N) nor the Hydrogen (H) are in balance!

Here's the reasoning:

⓵ A properly balanced chemical equation means that the quantity of atoms on the reactants side matches that on the products side.

→ The equation lacks balance because there are 2 Nitrogen atoms and 2 Hydrogen atoms on the reactants side. In contrast, on the products side, there is only 1 Nitrogen atom and 4 Hydrogen atoms. Thus, the number of atoms on each side is not consistent!

Hopefully, this clarification is helpful; feel free to reach out if you have any further questions! ☻

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1 month ago