If an object is in motion is it passing through the air,moving along the ground, or both

Changes of state are a result of a change in the______of the matter.

jasenka [17]

Answer: -

Kinetic energy.

Explanation: -

Solids have the least kinetic energy and the highest intermolecular force of attraction among the three states of matter.

When heat energy is supplied to the solid, the kinetic energy of the solid particles increases. At some point, the kinetic energy becomes comparable to the intermolecular force of attraction. At that point solids change into liquids.

When further heat energy is given, at certain point the kinetic energy becomes far greater than the intermolecular forces of attraction. At that point it becomes gas.

4 0

4 years ago

Phosphorus pentachloride decomposes according to this equation. PCl5(g) equilibrium reaction arrow PCl3(g) + Cl2(g) An equilibri

melisa1 [442]

Answer:

PCl₅ = 0.03 X 208 = 6.24g

PCl₃ = 0.05 X 137 =6.85 g

Cl₂ = 0.03X71 = 2.13 g

Explanation:

The equilibrium constant will remain the same irrespective of the amount of reactant taken.

Let us calculate the equilibrium constant of the reaction.

Kc= $\frac{[PCl_{3}][Cl_{2}]}{[PCl_{5}]}$

Let us calculate the moles of each present at equilibrium

$moles=\frac{mass}{molarmass}$

molar mass of PCl₅=208

molar mass of PCl₃=137

molar mass of Cl₂=71

moles of PCl₅ = $\frac{mass}{molarmass}=\frac{4.13}{208}=0.02$

moles of PCl₃= $\frac{mass}{molarmass}=\frac{8.87}{137}=0.06$

moles of Cl₂ = $\frac{mass}{molarmass}=\frac{2.90}{71}=0.04$

the volume is 5 L

So concentration will be moles per unit volume

Putting values

Kc = $\frac{\frac{0.06}{5}\frac{0.04}{5}}{\frac{0.02}{5}}=0.024$

Now if the same moles are being transferred in another beaker of volume 2L then there will change in the concentration of each as follow

$PCl_{5}--->PCl_{3}+Cl_{2}$

Initial 0.02 0.06 0.04

Change -x +x +x

Equilibrium 0.02-x 0.06+x 0.04+x

Conc. (0.02-x)/2 (0.06+x)/2 (0.04+x)/2

Putting values

0.024 = $\frac{(0.06+x)(0.04+x)}{(0.02-x)2}$

Solving

$(0.024(2)(0.02-x)=(0.06+x)(0.04+x)$

$0.00096-0.048x=0.0024+x^{2}+0.1x$

$0.148x+x^{2}+0.00144=0$

x = -0.01

so the new moles of

PCl₅ = 0.02 + 0.01 =0.03

PCl₃ = 0.06-0.01 = 0.05

Cl₂ = 0.04-0.01 = 0.03

mass of each will be:

mass= moles X molar mass

PCl₅ = 0.03 X 208 = 6.24g

PCl₃ = 0.05 X 137 =6.85 g

Cl₂ = 0.03X71 = 2.13 g

5 0

3 years ago

Although we think of land when we hear the word biome, there are also aquatic biomes. The abiotic factors that influence life fo

trapecia [35]

The correct option is C.
Kelp are brown large algae, which live in cool, shallow water, close to the shore. Because they depend on light for photosynthesis, they usually inhabit shallow open water and they are found at depths that is not greater than 131 feet.

3 0

4 years ago

Read 2 more answers

A 2.0 sample of N2 occupy 50.0L at 15 degrees Celsius and 640mmHg. What volume will the gas occupy at 45 degrees Celsius and 160

inysia [295]

Answer:

220.8L

Explanation:

Given parameters:

Initial volume = 50L

Initial temperature = 15°C = 288K

Initial pressure = 640mmHg

Final temperature = 45°C = 318K

Final pressure = 160mmHg

Unknown:

Final volume = ?

Solution:

Using the combined law;

$\frac{p_{1}v_{1} }{T_{1} }$ = $\frac{p_{2}v_{2} }{T_{2} }$

p,v and T are pressure, volume and Temperature

$\frac{640 x 50}{288}$ = $\frac{160 x v_{2} }{318}$

160 x 288 x v₂ = 640 x 50 x 318

v₂ = 220.8L

6 0

3 years ago

Calculate the mass in grams of each of the following using dimensional analysis:

Mashutka [201]

The mass in grams of each of the following using dimensional analysis is:

6.02 x 10²³ atoms of Mg = 12g of Mg
3.01 x 10²³ formula units of CaCl2 = 55.5g of CaCl2
12.4 x 10¹⁵ molecules of formaldehyde (CH2O) = 0.000000618g of formaldehyde

<h3>How to calculate mass?</h3>

The mass of a substance can be calculated in different ways depending on whether molecules or moles are given.

First, we need to convert atoms/formula units/molecules to moles as follows:

6.02 × 10²³ ÷ 6.02 × 10²³ = 1 mole of Mg
3.01 x 10²³ ÷ 6.02 × 10²³ = 0.5 moles of CaCl2
12.4 x 10¹⁵ ÷ 6.02 × 10²³ = 2.06 × 10-⁸ moles of formaldehyde

Next, we convert each mole value to mass as follows:

1 mole of Mg = 1 × 12 = 12g of Mg
0.5 moles of CaCl2 = 0.5 × 111 = 55.5g of CaCl2
2.06 × 10-⁸ moles of CH2O = 0.000000618g of formaldehyde

Learn more about mass at: brainly.com/question/19694949

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3 0

2 years ago