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3 years ago

I need help on this please

Chemistry

1 answer:

Montano1993 [528]3 years ago

7 0

Answer:

Explanation:

There are three different elements in given chemical equation. These elements are hydrogen, oxygen and carbon.

Chemical equation:

2CH₄ + 4O₂ → 2CO₂ + 4H₂O

This equation shows the burning of methane. When methane burns in the presence of oxygen it produced water and carbondioxide.

We can see that all the reactant and product are made up of only three elements carbon, hydrogen and oxygen.

There are two reactant and two products in given reaction.

This reaction also follow the law of conservation of mass.

We can see that there are two carbon eight hydrogen and eight oxygen atoms on both side of equation.

This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

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how much hydrogen gas is necessary to exert a pressure of 1.4 ATM at 430k if occupying a volume of 15.1 l

lora16 [44]

Answer:

Explanation:

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3 years ago

Consider an atom having four distinct energy levels. If an electron is able to make transitions between any two levels, how many

Kryger [21]

Energy levels are the electron shells where electrons are found at a fixed distance from the nucleus of the atom. The atom could emit 6 different wavelengths.

<h3>What is wavelength?</h3>

A wavelength is a distance between the adjacent crests in wave signals propagated in a system. Wavelength $(\rm \lambda )$ is in inverse relation to the frequency of the wave.

When an electron jumps from energy level 1 to 2, 1 to 3, and 1 to 4 one wavelength each is present. Hence, making the total wavelength to be 3, in transition from the first energy level.

Similarly, from energy levels, 2 to 3 and 2 to 4, a total of 2 wavelengths, and from energy levels 3 to 4 one wavelength is produced.

So the total different wavelengths of the radiation that can be emitted will be 3 + 2 + 1 = 6.

Therefore, 6 different wavelengths of radiation will be emitted by the atom.

Learn more about wavelengths here:

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7 0

2 years ago

Plz help this was due yesterday butttttt i didn’t want to do it...

sergejj [24]

So what am I suppose to answer here?

8 0

3 years ago

Read 2 more answers

5. Why did you categorize the reactions the way you did? What do your physical reactions have in common? What do your chemical r

lapo4ka [179]

Answer:

What r u trying to ask? you need to put more stuff in your question on here so we can answer it.

Explanation:

7 0

3 years ago

What is the half-life of a pharmaceutical if the initial dose is 500 mg and only 31 mg remains after 6 hours?

Sergeu [11.5K]

Answer:

$\large \boxed{\text{b. 1.5 h}}$

Explanation:

1. Calculate the rate constant

The integrated rate law for first order decay is

$\ln \left (\dfrac{A_{0}}{A_{t}}\right ) = kt$

where

A₀ and A_t are the amounts at t = 0 and t

k is the rate constant

$\begin{array}{rcl}\ln \left (\dfrac{500}{31}\right) & = & k \times 6\\\\\ln 16.1 & = & 6k\\2.78& =& 6k\\k & = & \dfrac{2.78}{6}\\\\& = & 0.463 \text{ h}^{-1}\\\end{array}$

2. Calculate the half-life

$t_{\frac{1}{2}} = \dfrac{\ln2}{k} = \dfrac{\ln2}{\text{0.463 h}^{-1}} = \textbf{1.5 h}\\\\ \text{The half-life is $\large \boxed{\textbf{1.5 h}}$}$

4 0

3 years ago