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3 years ago

Balance the equation by inserting coefficients as needed. equation: C 2 H 6 O+O 2 longrightarrow CO 2 +H 2 O

Chemistry

1 answer:

shepuryov [24]3 years ago

4 0

The coefficients needed to balance the equation would be 2, 7, 4, and 6 respectively.

<h3>Balancing chemical equation</h3>

This requires that the number of atoms of each element is the same both on the reactant and product's sides.

Hence, the balanced equation of the reaction becomes:

$2C_2 H_6 O+ 7O_2 --- > 4CO_2 +6H_2 O$

Thus, the coefficient for each species would be 2, 7, 4, and 6 respectively.

More on balancing chemical equations can be found here: brainly.com/question/15052184

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2. Ultraviolet radiation has a frequency of 6.8 x 10'5Hz. Calculate the energy, in

Gnoma [55]

Answer:

$E=4.5\times 10^{-18}\ J$

Explanation:

It is given that, the frequency of Ultraviolet radiation is $6.8\times 10^{15}\ Hz$

We need to find the energy of the photon. The formula for the energy of a photon is given by :

$E=hf\\\\\text{Where h is Planck's constant}\\\\E=6.63\times 10^{-34}\times 6.8\times 10^{15}\\\\E=4.5\times 10^{-18}\ J$

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3 years ago

Calculate the heat released when 454 grams of steam at 100 degrees C condenses.

sasho [114]

<h3>Answer:</h3>

1026.05 kJ

<h3>Explanation:</h3>

The Quantity of heat is calculated by multiplying the mass of a substance by specific heat capacity and the change in temperature.
However, condensation takes place at a constant temperature.
Therefore, Quantity of heat is calculated by multiplying mass by the latent heat of vaporization.

That is; Q = m × Lv

In this case we are given;

Mass of steam as 454 g

To calculate the amount of heat released we must know the value of latent heat of vaporization;

The latent heat of vaporization of steam is 2260 J/g

Therefore;

Heat released, Q = 454 g × 2260 J/g

=1026040 Joules

But, 1000 joules = 1 kilo-joules

Thus, Q = 1026.04 kJ

Hence, the amount of heat released is 1026.05 kJ

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3 years ago

A metal that lost 2 electrons

Ymorist [56]

Answer:

is a member of IIA group

Explanation:

it has capacity to lose to electrons so that the become stable

8 0

3 years ago

P and Q are two substances such that the melting point of P and the boiling point of Q are the same. If P is a solid at a certai

Nimfa-mama [501]

Answer:

Explanation:

Firstly, it should be noted that melting and freezing points are the same. Thus, when a substance melts at a certain temperature, it means it can also start freezing/solidifying at that same temperature. That been said, <u>when the substance P is a solid at a certain temperature, the other compound Q will boil at that same temperature and hence will be a gas at that same temperature</u>.

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3 years ago

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TiliK225 [7]

Answer:

Coal, crude oil, and natural gas are all considered fossil fuels because they were formed from the fossilized, buried remains of plants and animals that lived millions of years ago. Because of their origins, fossil fuels have a high carbon content.

Explanation:

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3 years ago