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3 years ago

6

Will mark brainlist need help

1 answer:

Stella [2.4K]3 years ago

4 0

Answer:

0.219 mol HCI

Explanation:

Iron(II) sulfide reacts with hydrochloric acid according to the reaction:

FeS (s) + 2HCl (aq) → FeCl2 (s) + H2S (g)

A reaction mixture initially contains 0.223 mol FeS and 0.665 mol HCl.

Once the reaction has occurred as completely as possible, what amount (in moles) of the excess reactant remains?

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The chemical formula tells the types of atoms and how many of each are contained in a compound. Please select the best answer fr

ANEK [815]

A chemical formula can tell one the consisting atoms, the types of atoms and which they belong.Also through mole ratios, the number of atoms contained in a compound can also be identified through the chemical formula. In this problem, the answer is a. True.

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2 years ago

Which statements are correct about Avogadro’s constant?

abruzzese [7]

Answer:

Explanation:

I,II, and III

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2 years ago

What is the percent yield if 107.50 g NH3 reacts with excess O2 according to the

Maksim231197 [3]

Answer:

81.59%

Explanation:

4NH₃ + 5O₂ → 4NO + 6H₂O

First we <u>convert 107.50 g of NH₃ into moles</u>, using its <em>molar mass</em>:

107.50 g NH₃ ÷ 17 g/mol = 6.32 mol NH₃

Now we <u>calculate how many moles of NO would have been formed by the complete reaction of 6.32 moles of NH₃</u>:

6.32 mol NH₃ * $\frac{4molNO}{4molNH_3}$ = 6.32 mol NO

Then we <u>convert 6.32 moles of NO to grams</u>, using its <em>molar mass</em>:

6.32 mol NO * 30 g/mol = 189.60 g NO

Finally we <u>calculate the percent yield</u>:

154.70 g / 189.60 g * 100% = 81.59%

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3 years ago

If a 60-g object has a volume of 30 cm3, what is its density? 2 g/cm3 0.5 cm3/g 1800 g * cm3 none of the above

jasenka [17]

Answer : The density of an object is, $2g/cm^3$

Solution : Given,

Mass of an object = 60 g

Volume of an object = $30cm^3$

Formula used :

$\text{Density of an object}=\frac{\text{Mass of an object}}{\text{Volume of an object}}$

Now put all the given values in this formula, we get the density of an object.

$\text{Density of an object}=\frac{60g}{30cm^3}=2g/cm^3$

Therefore, the density of an object is, $2g/cm^3$

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3 years ago

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Anarel [89]

Answer:

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2 years ago