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3 years ago

A cell is placed in a salt solution that has the same concentration as the inside of the cell. What will happen to the cell?

Chemistry

1 answer:

nata0808 [166]3 years ago

4 0

Answer:

Explanation:

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Explain two ways that bills penguin toy is similar to the water cycle

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All the water on the earth is the same water that has been here since

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3 years ago

Methanol (ch3oh) has been proposed as an alternative fuel. calculate the standard enthalpy of combustion per gram of liquid meth

Kruka [31]

Answer:The standard enthalpy of combustion per gram of liquid methanol is 45.40kJ/g

Explanation:

$2CH_3OH(l)+3O_2(g)\rightarrow 2CO_2(g)+4H_2O(l)$

$\Delta H_{f,CH3OH(l)}=-239 kJ/mol$

$\Delta H_{f,O_2(g)}=0 kJ/mol$

$\Delta H_{f,CO_2(g)}=-393.5 kJ/mol$

$\Delta H_{f,H_2O(l)}=-286 kJ/mol$

Standard enthalpy of combustion of methanol : $\sum{\Delta H_{f,products}}-\sum{\Delta H_{f,reactants}}$

$=(2\times \Delta H_{f,CO_2(l)}+4\times \Delta H_{f,H_2O(g)})-(2\times \Delta H_{f,CH3OH(l)}+3\times \Delta H_{f,O_2(g)})$

$=[2\times (-393.5 kJ/mol)+4\times (-286 kJ/mol)]-[2\times (-239 kJ/mol)+3\times (0 kJ/mol)]=-1453 kj/mol$

The standard enthalpy of combustion per gram of liquid methanol:

$\frac{Delta H_{combustion}}{\text{molar mass of}CH_3OH}=\frac{-1453kJ/mol }{32g/mol}=-45.40kJ/g$

The standard enthalpy of combustion per gram of liquid methanol is 45.40kJ/g

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3 years ago

Early historical models of the solar system were geocentric. Which of these phrases describes a geocentric solar system?

likoan [24]

Answer:

Explanation:

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3 years ago

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4. One of the two products of this reaction is carbonic acid (H2CO3), which immediately forms water and the gas you identified a

Step2247 [10]

Answer:

H₂CO₃ (aq) ⇒ H₂O (l) + CO₂ (g)

Explanation:

Carbonic acid dissociates into water and carbon dioxide which is gas which is used as a fire extinguisher and also which is identified after expose to the flaming and glowing splints. It is a colorless gas which can be identified by brisk effervescence seen in the tube.

<u>The balanced reaction of the decomposition of carbonic acid is:</u>

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4 years ago

Please help me ASAP State 2 uses of a retort<br>stand according to Chemistry

skad [1K]

Answer:

2 uses of retort stand:

Retorts are used for distillation experiments (such as organic distillations) and titrations (where they hold a burette).
They are also used as supports in filtration.

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3 years ago