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3 years ago

90 POINTS TO BRAINLIEST!

Chemistry

1 answer:

Lemur [1.5K]3 years ago

6 0

Answer:

Explanation:

1). 2Cs + F2 ---> 2CsF

assigning the oxidation number to reactants and products of the above reaction:

Reactant = Cs + F2 (oxidation number of Cs = +1, oxidation number of F2 = 0)

Product = CsF ( Oxidation number of Cs in CsF is +2 and F is -1)

oxidized element in the reaction is one with increase in oxidation number

Oxidation number of Cs increases from +1 to +2

F is reduced because oxidation number is decreased from 0 to -1.

F is the oxidizing agent because it got reduced in the reaction.

2). Balanced equation:

Sn + HNO3 ---> SnO2 + NO2 + H2O

oxidation numbers 0 +1+5 -2 ⇔ -2+4-2 +4-2 +1-2

oxidation reaction= Sn ⇒ SnO2 + 4 e-

0 +4 -2

reduction reaction = HNO3 + e- ⇒ NO2

+1+5-2 +-2

combining the oxidation and reduction reaction equation, we will balance them by balancing the charges on them.

Sn + 2H2O ⇒ SnO2 + 4 e- +4 H+

HNO3 + e-+H+ ⇒ NO2 +H20

final reaction=

Sn + 4HNO3 SnO2 + 4 NO2 +2H20

0 +1+5-2 +4-2 +4-2

Charges on both the sides of reactant is

4 = 4

hence equation is balanced.

3 ) Voltaic cell and electrolyte cell difference is that voltaic cell converts chemical energy into electrical energy. Electrons are provided by redox reactions while in electrolyte cell electrical energy is converted to chemical energy and electron is given by external AC or DC battery.

Voltaic and electrolyte are similar as both these convert energy forms and require electron source for the reaction.

Read more on Brainly.com - brainly.com/question/15571088#readmore

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What evidence is there that all state of matter have mass

katovenus [111]

Answer:

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3 years ago

Calcular el volumen que ocupa 66 gramos de CO medido a 27°C y 624 mm Hg Dato: Masas atómicas: C= 12 y O=16 . R=62,4 mmHg L/mol K

jonny [76]

Respuesta:

72 L

Explicación:

Paso 1: Calcular los moles de CO

La masa molar de CO es 28,01 g/mol.

$66g \times \frac{1mol}{28,01g} =2,4mol$

Paso 2: Convertir la temperatura a Kelvin

Siempre que trabajamos con gases ideales, debemos convertir las temperaturas a la escala Kelvin. Usaremos la siguiente formula.

K = °C + 273,15

K = 27°C + 273.15

K = 300 K

Paso 3: Calcular el volumen de gas

Usaremos la ecuación del gas ideal

$P \times V = n \times R \times T\\V = \frac{n \times R \times T}{P} = \frac{2,4mol \times 62,4mmHg.L/mol.K \times 300K}{624mmHg} = 72 L$

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3 years ago

The graph above shows the distribution of molecular speeds for four different gases at the same temperature. What property of th

Eduardwww [97]

Answer:

The correct option is;

D.) The molecular masses of the gases, because the gas molecules have the same average kinetic energy and mass can be calculated using the equation, $KE_{avg} = \dfrac{1}{2} \times m \times v^2$