Chemistry, 02.10.2019 19:20 Ciarrathereal

Ammonium perchlorate (nh, cio) is the solid rocket fuel used by the u. s. space shuttle. it reacts with itself to produce nitrogen gas (n), chlorine gas (ci), oxygen gas (o), water ( and a great deal of energy, what mass of oxygen gas is produced by the reaction of 8.84 g of ammonium perchlorate? be sure your answer has the correct number of significant digits.

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Answer from: hilzepesqtatiana

The mass of oxygen gas produced is 2.4 grams

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

Given mass of ammonium perchlorate = 8.84 g

Molar mass of ammonium perchlorate = 117.5 g/mol

Putting values in equation 1, we get:

$\text{Moles of ammonium perchlorate}=\frac{8.84g}{117.5g/mol}=0.0752mol$

The chemical equation for the decomposition of ammonium perchlorate follows:

$2NH_4ClO_4\rightarrow N_2+Cl_2+2O_2+4H_2O$

By Stoichiometry of the reaction:

2 moles of ammonium perchlorate produces 2 moles of oxygen gas.

So, 0.0752 moles of ammonium perchlorate will produce = $\frac{2}{2}\times 0.0752=0.0752mol$ of oxygen gas

Now, calculating the mass of oxygen gas from equation 1, we get:

Molar mass of oxygen gas = 32 g/mol

Moles of oxygen gas = 0.0752 moles

Putting values in equation 1, we get:

$0.0752mol=\frac{\text{Mass of oxygen gas}}{32g/mol}\\\\\text{Mass of oxygen gas}=(0.0752mol\times 32g/mol)=2.4g$

Hence, the mass of oxygen gas produced is 2.4 grams

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.

Answer from: Quest

Afraidsugar lol it’s the third one

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Ammonium perchlorate (nh, cio) is the solid rocket fuel used by the u. s. space shuttle. it reacts w...

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