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lisabon 2012 [21]

2 years ago

15

Describe the way the moon moves in space?

1 answer:

Scilla [17]2 years ago

4 0

Gravitational Pull, is the answer. just like we orbit the sun, the moon orbits us. we act almost like a magnet, we follow the biggest guy as leader. if the sun dissapeared, we would die, but probably, we would start to revolve around jupiter as it is the biggest

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The eagle has landed was said when man landed on mars or on the moon

nekit [7.7K]

The moon, man has not been to mars yet

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2 years ago

Why can hydrogen only form one covalent bond?

MrRa [10]

Because its in group one....which only lose or gain electrons.....thus it will only have oneelectron to fulfill its octect rule

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5. Hurricane winds are strongest and rain is heaviest in the part of a hurricane called the<br>

Igoryamba

Answer:

In the center is the eye, with nearly clear skies, surrounded by the violent eyewall, with the strongest winds and very heavy rain.

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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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2 years ago

How do kinetic tiles work?

raketka [301]

Answer:

It works because of the significant principle of piezoelectricity

Explanation:

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