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2 years ago

In 2021 the James Webb Telescope will begin operation focusing on infrared wavelengths and must be kept extremely _______.

1 answer:

5 0

In 2021 the James Webb Telescope will begin operation focusing on infrared wavelengths and must be kept extremely cold.

<h3>What is James Webb Telescope?</h3>

The James Webb Telescope is the most important optical telescope present in space, which is employed by astronomers to observe celestial bodies and physical phenomena in the universe.

This space telescope (James Webb Telescope) is based on the infrared wavelengths that cover a specific length of 0.57 to 28-micrometer waves and enable to observe different spectra across the Universe.

In conclusion, in 2021 the James Webb Telescope will begin operation focusing on infrared wavelengths and must be kept extremely cold.

Learn more about the James Webb Telescope here:

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Steam reforming of methane ( CH4 ) produces "synthesis gas," a mixture of carbon monoxide gas and hydrogen gas, which is the sta

sertanlavr [38]

<u>Answer:</u> The pressure equilibrium constant for the reaction is $4.5\times 10^0$

<u>Explanation:</u>

We are given:

Initial partial pressure of methane = 0.60 atm

Initial partial pressure of water vapor = 2.6 atm

Equilibrium partial pressure of hydrogen gas = 1.4 atm

The chemical equation for the reaction of methane gas and water vapor follows:

$CH_4+H_2O\rightleftharpoons CO+3H_2$

<u>Initial:</u> 0.60 2.6

<u>At eqllm:</u> 0.60-x 2.6-x x 3x

Evaluating the value of 'x':

$\Rightarrow 3x=1.4\\\\x=0.467$

So, equilibrium partial pressure of methane gas = (0.60 - x) = [0.60 - 0.467] = 0.133 atm

Equilibrium partial pressure of water vapor = (2.6 - x) = [2.6 - 0.467] = 2.133 atm

Equilibrium partial pressure of carbon monoxide gas = x = 0.467 atm

The expression of $K_p$ for above equation follows:

$K_p=\frac{p_{CO}\times (p_{H_2})^3}{p_{CH_4}\times p_{H_2O}}$

Putting values in above equation, we get:

$K_p=\frac{0.467\times (1.4)^3}{0.133\times 2.133}\\\\K_p=4.517\times 10^0$

Hence, the pressure equilibrium constant for the reaction is $4.5\times 10^0$

8 0

3 years ago

A sample of gold has a mass of 645.0 lb and a volume of 0.5348 ft. What is its specific gravity? Number SG= What are the units o

LekaFEV [45]

Explanation:

The given data is as follows.

Mass of gold = 645 lb, Volume = 0.5348 ft3

Density of water = 62.4 lbs/ft3

It is known that specific gravity is defined as density of substance divided by the density of standard fluid.

Mathematically, Specific gravity = $\frac{\text{density of gold}}{\text{density of water}}$

Specific gravity = $\frac{\text{density of gold}}{62.4 (lbs.ft^{-3})}$

Now, calculate the density of gold then from density we will calculate specific gravity as follows

Since, Density = $\frac{mass}{volume}$

Density = $\frac{645 lbs}{0.5348 ft^{3}}$

= 1206.06 $lbs/ft^{3}$

As, Specific gravity = $\frac{\text{density of gold}}{\text{density of water (standard fluid)}}$

= $\frac{1206.06 (lbs/ft^{3})}{62.4 (lbs/ft^{3})}$

= 19.32

Therefore, the value of specific gravity is 19.32.

Specific gravity has no units as it is density divided by density. Hence, all the units get canceled out.

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3 years ago

An elements atomic number is the number of protons in its __________

elena55 [62]

Answer:

Nucleus

Explanation:

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3 years ago

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Identify the reaction type:

WARRIOR [948]

Answer:

The reaction type is Synthesis

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3 years ago

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What is the phase change that occurs when a soild becomes a liquid

Mademuasel [1]

Fusion or melting is the phase change from solid to liquid.

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4 years ago