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3 years ago

If a sealed syringe that contains some gas is plunged into cold water, in which direction will the syringe piston slide?

Chemistry

2 answers:

s344n2d4d5 [400]3 years ago

7 0

Answer: Syringe piston will slide down .

Explanation: If a sealed syringe that contains some gas is plunged unto cold water, now the gas will also gets cool by the effect of cold water.

As the cold gas has a tendency to occupy the less volume, thus making the syringe to move down.

Thus the direction of the syringe piston will be downwards making the way for the cold gas to occupy the lesser volume.

Anton [14]3 years ago

3 0

If the piston is facing towards the bottom of the container holding the cold water, the piston will not move. It will move wherever it is facing.

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Given 7.65 mol AgNO3, determine the number of formula units.

Komok [63]

Answer:

The number of formula units of silver nitrate is $4.61\times 10^{24}$ .

Explanation:

Moles of silver nitrate = n = 7.65 mol

1 mole = $N_A=6.022\times 10^{23}$ atoms/ molecules/ ions

Let the number of formula units of silver nitrate be N.

$N=n\times N_A$

$N=7.65 mol\times 6.022\times 10^{23}=4.61\times 10^{24}$

The number of formula units of silver nitrate is $4.61\times 10^{24}$ .

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4 years ago

elixir [45]

Answer:

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3 years ago

A sample of gas contains 0.1900 mol of CO(g) and 0.1900 mol of NO(g) and occupies a volume of 22.0 L. The following reaction tak

worty [1.4K]

Answer:

V₂ = 16.5 L

Explanation:

To solve this problem we use Avogadro's law, which applies when temperature and pressure remain constant:

V₁/n₁ = V₂/n₂

In this case, V₁ is 22.0 L, n₁ is [mol CO + mol NO], V₂ is our unknown, and n₂ is [mol CO₂ + mol N₂].

n₁ = mol CO + mol NO = 0.1900 + 0.1900 = 0.3800 mol

We use the reaction to calculate n₂:

2CO(g) + 2NO(g) → 2CO₂(g) + N₂(g)

mol CO₂:

0.1900 mol CO * $\frac{2molCO_{2}}{2molCO} =$ 0.1900 mol CO₂

mol N₂:

0.1900 mol NO * $\frac{1molN_{2}}{2molNO} =$ 0.095 mol N₂

n₂ = mol CO₂ + mol N₂ = 0.1900 + 0.095 = 0.2850 mol

Calculating V₂:

22.0 L / 0.3800 mol = V₂ / 0.2850 mol

V₂ = 16.5 L

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4 years ago

Most of earths fresh water is in glaciers True or false PEASE HELPP

Sati [7]

Answer:

True

Explanation:

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3 years ago

Read 2 more answers

A metal hammer has been lying in the sunlight on a hot day. When you pick up the hammer, it feels very warm in your hand. Can yo

tangare [24]

Answer:

When the hammer is in the sun, heat flows by radiation

When you pick up the hammer, heat flows by conduction

Explanation:

As the hammer lies in the sun, heat is transferred to the hammer by radiation. Heat energy reaches the earth from the sun by radiation. Radiation is a mode of beat transfer in which heat is transferred without a material medium.

When you pick up the hammer, heat flows to your hand by conduction because your body is a conductor of heat.

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3 years ago