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3 years ago

How many grams are in 562 dg? 56.2 g 56,200 g 5.620 g 5.62 g

Chemistry

1 answer:

lana66690 [7]3 years ago

7 0

Answer:

56.2

Explanation:

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An unknown amount of mercury (II) oxide was decomposed in the lab. Mercury metal was formed and 5.20 L of oxygen was released at

Yakvenalex [24]

Answer:

68.3g

Explanation:

1. Word equation:

mercury(II) oxide → mercury + oxygen

2. Balanced molecular equation:

2HgO → 2Hg + O₂(g)

3. Mole ratio

Write the ratio of the coefficients of the substances that are object of the problem:

$2molHgO/1molO_2$

4. Calculate the number of moles of O₂(g)

Use the equation for ideal gases:

$pV=nRT\\\\\\n=\dfrac{pV}{RT}\\\\\\n=\dfrac{0.970atm\times5.20L}{0.08206atm.L/K.mol\times 390.0K}\\\\\\n=0.1576mol$

5. Calculate the number of moles of HgO

$\dfrac{2molHgO}{1molO_2}\times 0.1576molO_2=0.315molHgO$

6. Convert to mass

mass = # moles × molar mass

molar mass of HgO: 216.591g/mol

mass = 0.315mol × 216.591g/mol = 68.3g

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2 years ago

In response to boyle’s law, the pressure of a gas increases as the volume decreases because

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because the gas particles are forced closer together.

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3 years ago

One example of an ionic compound is F2 CO2 HBr MgCL2

allochka39001 [22]

MgCl2 because it is the only option in which a metal appears with a nonmetal. In this case, the metal transfers electrons to the nonmental because the metal has a lower ionization energy.

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Pls help 8th grade k12

I am Lyosha [343]

Look it up online you will find it

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2 years ago

Write the molecular formula of potassium chloride

Naddik [55]

Answer:

KCl is the answers for the question

Explanation:

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