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3 years ago

PLEASE ANSWER THIS FAST!! (I’ll give ALL my points)!!

Chemistry

1 answer:

Lapatulllka [165]3 years ago

4 0

Answer:

Explanation:

hakuna

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There are 6.022 x 10^23 atoms of Hg in 1 mole of Hg. The number of atoms in 4.5 moles of Hg can be found by multiplying 4.5 by 6

serious [3.7K]

Answer:

D. 27.099 x 10²³.

Explanation:

It is known that every 1.0 mole of an atom contains Avogadro's no. (6.022 x 10²³) atoms.

So, 4.5 mol of Hg will contain:

(4.5 mol)(6.022 x 10²³) = 27.099 x 10²³ atoms.

So, the right choice is: D. 27.099 x 10²³.

4 0

3 years ago

Read 2 more answers

13. What is the photon energy associated with visible light with a wavelength of 4.25x10^-7 m?

4vir4ik [10]

$\\ \sf\bull\longmapsto E=hv$

$\\ \sf\bull\longmapsto E=\dfrac{hc}{\lambda}$

$\\ \sf\bull\longmapsto E=\dfrac{6.626\times 10^{-34}Js\times 3\times 10^8ms^{-1}}{4.25\times 10^{-7}m}$

$\\ \sf\bull\longmapsto E=\dfrac{19.878\times 10^{-26}Jm}{4.25\times 10^{-7}m}$

$\\ \sf\bull\longmapsto E=4.677\times 10^{-19}J$

$\\ \sf\bull\longmapsto E=4677\times 10^{-16}J$

$\\ \sf\bull\longmapsto E=4677eV$

5 0

2 years ago

Sodium permanganate and iron(III) chloride are both dissolved in a beaker of water. In a double displacement reaction, two new p

Nastasia [14]

Answer: The balanced chemical equation is written below.

Explanation:

Double displacement reaction is defined as the reaction in which exchange of ions takes place.

$AB+CD\rightarrow CB+AD$

When sodium permanganate reacts with iron (III) chloride, it leads to the production of sodium chloride and iron (III) permanganate.

The chemical equation for the reaction of sodium permanganate and iron (III) chloride follows:

$3NaMnO_4(aq.)+FeCl_3(aq.)\rightarrow Fe(MnO_4)_3(s)+3NaCl(aq.)$

By Stoichiometry of the reaction:

3 moles of aqueous solution of sodium permanganate reacts with 1 mole of aqueous solution of iron (III) chloride to produce 1 mole of solid iron permanganate and 3 moles of aqueous solution of sodium chloride

Hence, the balanced chemical equation is written above.

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3 years ago

How cold does it have to be for boiling water to freeze instantly

scZoUnD [109]

Answer:

Below 0° degrees Celcius

Explanation:

For deposition (gas to solid) to happen, the temperature has to be below 0° Celsius. If so, deposition occurs, and ice crystals form.

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2 years ago

Елементите от IА и IIА групи на Периодичната система

sergiy2304 [10]

Yes yes you are totally right

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3 years ago