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3 years ago

Part A

Chemistry

1 answer:

den301095 [7]3 years ago

3 0

Answer:

$n_{Cl_2}=0.3molCl_2$

Explanation:

Hello there!

In this case, according to the given chemical reaction whereas the sodium chloride is in a 2:1 mole ratio with chlorine, the required moles of the later are computed as shown below:

$n_{Cl_2}=0.6molNaCl*\frac{1molCl_2}{2molNaCl}$

So we cancel out the moles of NaCl to obtain:

$n_{Cl_2}=0.3molCl_2$

Best regards!

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HELP IM BEING TIMED: btw its science im just putting some thing random

neonofarm [45]

Answer:

I thinks something bad will happen but science can change so im not sure

Explanation:

Science changes because of diffrent thing like enviorment

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3 years ago

A buffer is prepared such that [H2PO4-] = 0.095M and [HPO42-] = 0.125M? What is the pH of this buffer solution? (pKa = 7.21 for

ANTONII [103]

Answer:

pH of the buffer is 7.33

Explanation:

The mixture of the ions H₂PO₄⁻ and HPO₄²⁻ produce a buffer (The mixture of a weak acid, H₂PO₄⁻, with its conjugate base, HPO₄²⁻).

To find pH of a buffer we use H-H equation:

pH = pka + log [A⁻] / [HA]

<em>Where A⁻ is conjugate base and HA weak acid.</em>

<em />

For the H₂PO₄⁻ and HPO₄²⁻ buffer:

pH = pka + log [HPO₄²⁻] / [H₂PO₄⁻]

Computing values of the problem:

pH =7.21 + log [0.125M] / [0.095M]

pH = 7.33

<h3>pH of the buffer is 7.33</h3>

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3 years ago

Choose the correct answer. The difference between the mass number of an isotope and its atomic number is:

lisabon 2012 [21]

The difference between the mass number of an isotope and its atomic number is number of neutrons.

<h3>What is atomic mass? </h3>

Atomic mass is defined as the sum of number of protons and number of neutrons of an element.

Atomic mass is represented by A.

<h3>What is Atomic number?</h3>

Atomic number is defined as the number of electron in an element.

Atomic number is represented by Z.

<h3>What is Isotopes? </h3>

Isotopes are the element which have same atomic number but have different atomic mass.

Number of proton is equal to number of electrons.

Proton is positively charged, electrons are negativity charge while neutrons are neutral in nature.

Proton and neutrons are present in the nucleus of an element. On the other hand, electron revolves around the nucleus.

For example:

The atomic mass of¹⁶₈O is 16, while of ¹⁷₈O is 17.

Neutrons = atomic mass - atomic number

Neutrons of ¹⁶₈O = 16-8 = 8

Neutrons of ¹⁷₈O = 17-8 = 9

So, they have different atomic mass and number of neutrons.

Thus, we concluded that the difference between the mass number of an isotope and its atomic number is number of neutrons.

learn more about atomic mass:

brainly.com/question/14250653

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2 years ago

An enzyme is discovered that catalyzes the chemical reaction:SAD -------->HAPPY

jekas [21]

Answer: Km = 10μM

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Enzyme veolcity is calculated as:

$V_{0} = \frac{E_{t}.K_{cat}.[substrate]}{K_{m}+[substrate]}$