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2 years ago

Which of the following elements has the first ionization energy?

Chemistry

2 answers:

Ratling [72]2 years ago

8 0

Answer:

Explanation:

adell [148]2 years ago

7 0

<h2>Answer:</h2>

Among these elements the strontium (Sr) has lowest first ionization energy.

<h3>Explanation:</h3>

The first ionization energy is the energy required to remove one mole of the most loosely held electrons from one mole of gaseous atoms to produce 1 mole of gaseous ions each with a charge of 1+.

The first of two main methods which scientists use to calculate the ionization energy is the Subtraction Method.

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Which pollutants come from air? How and why do these form?

IgorC [24]

Answer:

Air pollution is caused by solid and liquid particles and certain gases that are suspended in the air. These particles and gases can come from car and truck exhaust, factories, dust, pollen, mold spores, volcanoes and wildfires.

Explanation:

4 0

2 years ago

On a mission to a newly discovered planet, an astronaut finds chlorine abundances of 13.85 % for 35Cl and 86.15 % for 37Cl. What

diamong [38]

Answer:

36.693

Explanation:

From the question given, the following were obtained:

Let 35Cl be isotope A and 37Cl be isotope

For isotope A (35Cl),

Mass number = 34.9700

Abundance = 13.85 %

For isotope B (37Cl),

Mass number = 36.9700

Abundance = 86.15 %

Atomic mass =

[( Mass of AxAbundance A)/100] + [(Mass of BxAbundance B)/100]

[(34.97x13.85)/100] + [(36.97x86.15)/100]

= 36.693

6 0

2 years ago

What is the mass of 5.130 moles of Table salt, sodium chloride (NaCl)

mina [271]

<em>The answer is 58.44277</em>

5 0

2 years ago

A mixture of gaseous CO and H2, called synthesis gas, is used commercially to prepare methanol (CH3OH), a compound considered an

Anit [1.1K]

<u>Answer:</u> The value of $K_c$ for the reaction at 550.3 K is 247.83

<u>Explanation:</u>

Equilibrium constant in terms of concentration is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. It is expressed as $K_{c}$

For a general chemical reaction:

$aA+bB\rightarrow cC+dD$

The expression for $K_{c}$ is written as:

$K_{c}=\frac{[C]^c[D]^d}{[A]^a[B]^b}$

The chemical equation for the production of methanol follows:

$CO+2H_2\rightleftharpoons CH_3OH$

The expression of $K_c$ for above equation follows:

$K_c=\frac{[CH_3OH]}{[CO][H_2]^2}$

We are given:

$[CH_3OH]=0.0401mol/L$

$[CO]=0.02722mol/L$

$[H_2]=0.07710mol/L$

Putting values in above equation, we get:

$K_c=\frac{0.0401}{0.02722\times (0.07710)^2}\\\\K_c=247.83$

Hence, the value of $K_c$ for the reaction at 550.3 K is 247.83

3 0

2 years ago

PLZZ HELLLPBalance the following reaction: AL2O3 + HCI ⇒ ALCI3 + H2O

Alina [70]

Im assuming that the 2 is a sub of the Al and not the # for O and that u made a type of AL which is Al
its been a while but

Al2O3 + 6HCl = 2ALCl3 + 3H2O

3 0

3 years ago