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Eva8 [605]
3 years ago
10

Select the correct answer.

Chemistry
1 answer:
padilas [110]3 years ago
8 0
The answer is C. It cooled down before large crystals could form
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Aluminum metal and manganese (IV) oxide react to produce aluminum oxide and manganese metal. What mass of manganese (IV) oxide r
gayaneshka [121]

Answer: 1.77 kg of manganese (IV) oxide reacts to produce 1.12kg of manganese metal.

Explanation:

The balanced chemical equation is:

4Al+3MnO_2\rightarrow 2Al_2O_3+3Mn

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

moles of manganese = \frac{1.12\times 1000g}{55g/mol}=20.4mol

According to stoichiometry :

3 moles of Mn is produced by = 3 moles of MnO_2

Thus 20.4 moles of Mn is produced by =\frac{3}{3}\times 20.4=20.4moles  of MnO_2

Mass of MnO_2=moles\times {\text {Molar mass}}=20.4moles\times 86.9g/mol=1773g=1.773kg    (1kg=1000g)

Thus 1.77 kg of manganese (IV) oxide reacts to produce 1.12kg of manganese metal.

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3 years ago
Which food type will show no colour charge when it is tested with millon's reagent /Bluret solution​
MAVERICK [17]

Answer:

hssj

Explanation:

sjzh ill jj sonámbulas

8 0
3 years ago
What is the hybridization of the central atom in becl2?
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Its hybridization would be sp because Be only has 2 covalent bonds with Cl
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What is the element presented, in this compound?
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compound name compound formula elements present

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carbon monoxide CO carbon (C) and oxygen (O)

carbon dioxide CO2 carbon (C) and oxygen (O)

4 0
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If a container contains 3.5 moles and has a volume of 1.5 L, then what volume is it when it contains 8 moles? *
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Volume would be 3.4 L
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