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soldi70 [24.7K]
2 years ago
14

How many moles (of molecules or formula units) are in each sample? 75.83 g CF2Cl2

Chemistry
1 answer:
lianna [129]2 years ago
7 0
0.627 moles. Use dimensional analysis grid as shown (multiply across, divide by the bottom number)

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Grace injured her ankle while running a relay race at the family reunion. Her aunt breaks the inner, activator portion of an ins
Solnce55 [7]

Answer:

A

Explanation:

8 0
3 years ago
¿Cómo afectaría la velocidad de una reacción si se enfría lentamente la mezcla de los reactivos? AYUDA
hodyreva [135]

Answer:

La velocidad de reacción se ralentizará más rápidamente de lo habitual.

Explanation:

Dado que los factores que influyen en la velocidad de una reacción química son;

1) Temperatura de la mezcla reaccionante

2) Concentración (para líquidos) y área superficial de presión (para gases) (para sólidos) de los reactivos

3) catalizador

4) Reactantes naturaleza

5) Orientación de las moléculas reactivas reactivas

Tenemos que, específicamente, disminuir la temperatura del reactivo disminuye la probabilidad de que las moléculas de los reactivos involucrados en colisiones dentro de la mezcla tengan suficiente energía (que es igual o mayor que la energía de activación, Ea) para que la reacción se complete . Es decir, habrá una disminución en las colisiones efectivas (colisiones que provocan una reacción) y la reacción se ralentizará.

Dado que la velocidad de reacción se ralentiza con el tiempo, los reactivos de enfriamiento lento ralentizan rápidamente la reacción.

8 0
4 years ago
`Suppose you have a sample of NaOH (0.0315 L, to be exact). If this amount of NaOH is used to exactly titrate 0.0250 L of HCl th
yuradex [85]

Answer:

0.0835 M

Explanation:

Step 1: Write the balanced equation

NaOH + HCl ⇒ NaCl + H₂O

Step 2: Calculate the reacting moles of HCl

0.0250 L of 0.105 M HCl react.

0.0250 L × 0.105 mol/L = 2.63 × 10⁻³ mol

Step 3: Calculate the reacting moles of NaOH

The molar ratio of NaOH to HCl is 1:1. The reacting moles of NaOH are 1/1 × 2.63 × 10⁻³ mol = 2.63 × 10⁻³ mol.

Step 4: Calculate the molarity of NaOH

2.63 × 10⁻³ moles of NaOH are in 0.0315 L of solution.

M = 2.63 × 10⁻³ mol / 0.0315 L = 0.0835 M

7 0
3 years ago
The value of Δ for the [CrF6]^3- complex is 182 kJ/mol.Calculate the expected wavelength of the absorption corresponding to prom
anastassius [24]

Answer:

6.63*10-7 m

Explanation:

The energy of one mole of the compound is obtained by dividing by the Avogadro number. Then the wavelength is obtained from

E= hc/wavelength as shown in the question.

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4 years ago
For an assignment, Alexis has to write a scientific question. She writes, "How much money should be spent to research brain canc
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D will brain cancer eventually be curable?

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