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3 years ago

Think about what you've learned about how particle motion is related to temperature.

Chemistry

1 answer:

statuscvo [17]3 years ago

8 0

Answer:

1& 4

Explanation:

1. The average kinetic energy of the particles in a substance determines the substance's temperature.

4. How fast a substance's particles are moving determines how hot or cold the substance is.

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The compound AlP (aluminum phosphide) is a compound semiconductor having mixed ionic and covalent bonding. Calculate the fractio

netineya [11]

Answer:

0.086

Explanation:

The formula for calculating the fraction of a covalent bond can be expressed as:

= exp (-0.25ΔE²)

$= exp[-0.25(E_{Al}-E_{p})^2]---(1)$

from the equation above;

$E_{Al}$ = the electronegativity of aluminum

$E_P$ = electronegativity of phosphorus

Using the data from periodic table figures;

$E_{Al}$ = 1.5

$E_P$ = 2.1

∴

fraction of the covalent = exp[-0.25(1.5 - 2.1)²]

fraction of the covalent = exp(-0.09)

fraction of the covalent = 0.914

Now, the fraction of ionic bond will be = 1 - the fraction of covalent bond

= 1 - 0.914

∴

the fraction of bond that is ionic = 0.086

6 0

3 years ago

10.0 g of gaseous ammonia and 6.50 g of oxygen gas are introduced into a previously evacuated 5.50 L vessel. If the ammonia and

Shalnov [3]

Answer:

The density is 3g/L

Explanation:

The reaction that occurs in the vessel is:

4 NH₃ + 5 O₂ → 4 NO + 6 H₂O

10,0g of NH₃ are:

$10,0g * \frac{1mol}{17,031g} = 0,587 moles$

6,50 g of O₂ are:

$6,50g * \frac{1mol}{32g} = 0,203 moles$

For a complete reaction of O₂ there are necessaries:

$0,203 mol * \frac{4molNH_{3}}{5molO_{2}}= 0,163 moles of NH_{3}$

O₂ is limiting reactant. The excess moles of NH₃ are:

0,587 - 0,163 = 0,424 moles of NH₃

These moles are:

$0,424mol * \frac{17,031g}{1mol} =$ 7,22g of NH₃

Knowing O₂ is limiting reactant, mass of NO and H₂O are:

$0,203molO_{2}*\frac{4molNO}{5molO_{2}}*\frac{30,01g}{1molNO} =$ 4,87g of NO

$0,203molO_{2}*\frac{6molH_{2}O}{5molO_{2}}*\frac{18,02g}{1molH_{2}O} =$ 4,39g of H₂O

The total mass is: 7,22g + 4,87g + 4,39g = 16,48g ≡ 16,5g

-The same mass add in the first. By matter conservation law-

As vessel volume is 5,50L, density is:

16,5g/5,50L = 3g/L

I hope it helps!

7 0

4 years ago

If a substance has a high hydronium concentration, the substance has a ____ pH.

aalyn [17]

Answer: low pH

Hydronium is H^+ and acids give hydronium ions to water solution.

PH = -log H^+ concentration. The higher the concentration, the lower pH value

4 0

3 years ago

I need help pleaseee!!!!!!!! Fast

AfilCa [17]

Answer:

C is the correct answer

Explanation:

Hope this helps:)

4 0

3 years ago

Read 2 more answers

What’s 25mg in grams

Aliun [14]

1 gram = 1000 mg

1 mg = 1/1000 g

25 mg = 25* (1/1000) g = 25/1000 g = 0.025g

3 0

4 years ago