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3 years ago

How many moles of gas Does it take to occupy 520 mL at a pressure of 400 torr and a temperature of 340 k

Chemistry

1 answer:

Lubov Fominskaja [6]3 years ago

3 0

Answer would be B. I provided work on an image attached. Message me if u have any other questions on how to do it

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What is the elements don’t bond with other elements because their outer shell is filled?

Shtirlitz [24]

Answer:

Inert gases or noble gases

Explanation:

These gases have 8 outer shells meaning their full so they won't allow chemical reactions therefore providing an inert environment hence the name inert gas.

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3 years ago

Give the ΔH value for the decomposition of silver chloride as shown in the reaction 2AgCl(s)+127 kJ→2Ag(s)+Cl2(g).

choli [55]

Answer: $\Delta H=+127kJ$

Explanation:

$2AgCl(s)+127kJ\rightarrow 2Ag(s)+Cl_2(g)$

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and $\Delta H$ for the reaction comes out to be negative.

Endothermic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat and $\Delta H$ for the reaction comes out to be positive.

As the heat is absorbed the reactants , the reaction is endothermic and $\Delta H$ for the given endothermic reaction will be +127 KJ

6 0

4 years ago

Balance<br> Sn(s) + HNO3(aq) →SnO2(s) + NO2(g) + H2O(1)

OlgaM077 [116]

Answer:

Sn + 4HNO3 → SnO2 + 4NO2 + 2H2O

Explanation:

7 0

3 years ago

A solid reactant is placed into a beaker of a warm water. The liquid vigorously bubbles as the solid dissolves into the solution

Nataly [62]

Answer:

Fewer bubbles will be produced because of fewer collisions of reactant molecules

Explanation:

As the solid dissolves into the solution after the liquid has been vigorously bubbled, if the temperature of the liquid is reduced a little, what will happen is that fewer bubbles will be produced as a result of lesser amount of collisions occurring between the reactant molecules

3 0

3 years ago

A marshmallow is burned in a soda can calorimeter and heats up .255 kg of water by 12. 9°C the calorimeter was calibrated and ha

lara31 [8.8K]

A marshmallow containing 7.00 g of sugar is burned in a soda can calorimeter heating .255 kg of water by 12.9 °C.

A marshmallow is burned in a soda can calorimeter heating .255kg of water by 12.9 °C. We can calculate the heat absorbed (Qa) by the calorimeter using the following expression.

$Qa = c \times m \times \Delta T = \frac{8.50kcal}{kg.\° C } \times 0.255kg \times 12.9 \° C = 28.0 kcal$

where,

c: calorimetry constant
m: mass of water in the calorimeter
ΔT: change in the temperature

According to the law of conservation of energy, the sum of the heat released by the combustion (Qr) and the heat absorbed by the water (Qa) is zero.

$Qr + Qa = 0\\\\Qr = -Qa = -28.0 kcal$

Carbohydrates contain 4.00 kcal per gram. The mass of sugar that released 28.0 kcal is:

$-28.0 kcal \times \frac{1g}{-4.00 kcal } = 7.00 g$

A marshmallow containing 7.00 g of sugar is burned in a soda can calorimeter heating .255 kg of water by 12.9 °C.

Learn more: brainly.com/question/15053365

5 0

2 years ago