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3 years ago

How many atoms are in 200.0 grams of Sulfur (S)?

Chemistry

1 answer:

Mama L [17]3 years ago

4 0

Answer:

37.64 × 10²³ atoms

Explanation:

Given data:

Number of atoms = ?

Mass of sulfur = 200.0 g

Solution:

First of all we will calculate the number of moles of sulfur.

Number of moles = mass/molar mass

Number of moles = 200.0 g/ 32 g/mol

Number of moles = 6.25 mol

Number of atoms:

Avogadro number:

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

6.25 mol × 6.022 × 10²³ atoms / 1mol

37.64 × 10²³ atoms

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Which element has a crystalline lattice through which electrons flow freely

xxTIMURxx [149]

Answer:

Copper

Explanation:

Metals are often arranged in crystalline lattices. The lattice consists of metal ions with an overlying sea of electrons. The conductivity of a metal depends on the nature of this crystal lattice. Naturally, some metals conduct electricity better than others. The unique properties of the crystal lattice of copper allow electrons to flow through it freely especially when it is drawn into a wire.

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3 years ago

The equilibrium reaction below has the Kc = 0.254 at 25°C. If the temperature of the system at equilibrium is decreased to 0°C,

tia_tia [17]

Answer:

The equilibrium shifts towards reagents

Explanation:

Is known $Kc=\frac{[products]}{[reagents]}$ rised to the power of their number of moles in the balanced reaction. When you have a system at equilibrium with Kc < 1, it means [products] < [reagents] and the system needs energy to react, so if you decrease tempeture the equilibrium shifts towards reagents and less products will be created.

This efect can be discribed with Van´t Hoff equation: $ln(\frac{K1}{K2}) =-\frac{dH}{R} (\frac{1}{T1} -\frac{1}{T2} )$ where we can see that if we decrease temperature (this is T2<T1) in consecuense K2<K1 and reaction doesn´t happen.

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3 years ago

A scientist is using a microscope to observe a type of (prokaryote) bacteria. Which 2 structures would the scientist most likely

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3 years ago

Read 2 more answers

A sealed container can hold

svp [43]

0.216 moles of gas can the container hold if a sealed container can hold 0.325 L of gas at 1.00 atm and 293 K.

<h3>What is an ideal gas equation?</h3>

The ideal gas law (PV = nRT) relates the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).

PV=nRT, where n is the moles and R is the gas constant. Then divide the given mass by the number of moles to get molar mass.

Given data:

R = gas constant = 0.08206 L.atm / mol K

T = temperature, Kelvin

V=5 L

P = 1.05 atm

T = 296 K

Putting value in the given equation:

$\frac{PV}{RT}=n$