3 years ago

Which greenhouse gas is emitted when people burn fossil fuels for energy?

Chemistry

1 answer:

Volgvan3 years ago

5 0

It would be carbon dioxide because carbon dioxide makes up the vast majority of greenhouse gas .

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Number of H in 3(NH4)2Cro4

zlopas [31]

The number of H atoms in 3(NH₄)₂CrO₄ = 24

<h3>Further explanation </h3>

The empirical formula is the smallest comparison of atoms of compound forming elements.

A molecular formula is a formula that shows the number of atomic elements that make up a compound.

(empirical formula) n = molecular formula

Subscripts in the chemical formula indicate the number of atoms

The compound of 3(NH₄)₂CrO₄ ( 3 molecules of (NH₄)₂CrO₄ ) :

Number of H :

$\tt 4\times 2(subscript)\times 3(coefficient,number~of~molecules)=24~atoms$

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What happens to the individual molecules of a liquid as they gain enough kinetic energy to escape the surface of the liquid?

Bumek [7]

Im pretty sure They freeze

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Positive feedback is when the change caused by the stimulus is A )decreased B) changes constantly C) nonexistent D) Increased HE

polet [3.4K]

Answer:

c) nonexistent

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3 years ago

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elena55 [62]

Answer:

Explanation:

North and South must always be opposite of each other.

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A 20.0 g piece of a metal is heated and place into a calorimeter containing 250.0 g of water initially at 25.0 oC. The final tem

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Answer:

$Q_{metal} = -6799\,J$

Explanation:

By the First Law of Thermodynamics, the piece of metal and water reaches thermal equilibrium when water receives heat from the piece of metal. Then:

$Q_{metal} = - Q_{w}$

$Q_{metal} = m_{w} \cdot c_{p,w}\cdot (T_{1}-T_{2})$

$Q_{metal} = (250\,g)\cdot \left(4.184\,\frac{J}{g\cdot ^{\textdegree}C} \right)\cdot (25\,^{\textdegree}C - 31.5\,^{\textdegree}C)$

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