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3 years ago

A generator is not required to generate electrical energy when which of the following energy sources is used?

Chemistry

2 answers:

Anon25 [30]3 years ago

5 0

Answer:

think it's C but my gut is telling me A

Explanation:

ladessa [460]3 years ago

3 0

Hydroelectric is the energy source used

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How do chemists model the valence electrons in a metal

Bumek [7]

Answer:

the valence electrons of atoms in a pure metal can be modeled as a sea of electrons

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2 years ago

When 0.5141 g of biphenyl (C12H10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.823 °C to 29.419 °C

natka813 [3]

Answer:

$\Delta_{r}U$ of the reaction is -6313 kJ/mol

$\Delta_{r}H$ of the reaction is -6312 kJ/mol

Explanation:

$Temperature\,\,change= \Delta U = 29.419-25.823 =3.506^{o}C$

$q_{cal}= C \times \Delta T$

$=5.861 \times 3.596 = 21.076\,kJ$

$q_{rxn}= -q_{cal}= -21.076\,kJ$

$\Delta_{r}U= -21.076 \times \frac{154}{0.5141}= -6313\, kJ/mol$

Therefore, $\Delta_{r}U$ of the reaction is -6313 kJ/mol.

The chemical reaction in bomb calorimeter is as follows.

$C_{12}H_{10}(s)+\frac{27}{2}O_{2}(g)\rightarrow 12CO_{2}(g)+5H_{2}O(g)$

$Number\,of\,moles\Delta n=(12+5)-\frac{27}{2}=3.5$

$\Delta_{r}H=\Delta E+ \Delta n. RT$

$=-6313+3.5\times 8.314\times 10^{-3} \times 3.596=-6312\,kJ/mol$

Therefore, $\Delta_{r}H$ of the reaction is -6312 kJ/mol.

3 0

3 years ago

Multiplication & Division

Tatiana [17]

Answer:

0.008 ÷ 51.3 = 0.00015594541910331380.00015594541910331382Round 0.0001559454191033138 → 0.0002 (Sig Figs: 1)

6 0

3 years ago

Read 2 more answers

In the image above, the region labeled “ A “ is called the . . .

tatyana61 [14]

The awnser is central canal the third one

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2 years ago

Read 2 more answers

When this element was discovered, it exhibited luster and malleability, and it reacted very vigorously with water. This element

rjkz [21]

The answer is potassium

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3 years ago