The concentration of gallium in silicon is 5.0 × 10−7 at%. What is the concentration in kilograms of gallium per cubic meter?

Answers

Answer 1

Answer:

The concentration of gallium in kilograms per cubic meter is equal to the calculated mass of gallium per cubic meter.

To determine the concentration of gallium in kilograms per cubic meter, we need to convert the concentration from atomic percent (at%) to kilograms per cubic meter.

The atomic fraction is the ratio of the number of gallium atoms to the total number of atoms in the silicon-gallium mixture.

We need to know the atomic masses of gallium and silicon. The atomic mass of gallium is 69.72 g/mol, and the atomic mass of silicon is 28.09 g/mol.

The atomic fraction of gallium can be calculated using the formula:

Atomic fraction of gallium = (Concentration of gallium in at%) / (Atomic mass of gallium) / [(Concentration of gallium in at%) / (Atomic mass of gallium) + (Concentration of silicon in at%) / (Atomic mass of silicon)]

Plugging in the given values:

Atomic fraction of gallium = ( $5.0 * 10^(-7)$ %) / (69.72 g/mol) / [( $5.0 * 10^(-7)$ at%) / (69.72 g/mol) + (100 - $5.0 * 10^(-7)$ ) at% / (28.09 g/mol)]

Now, let's convert the atomic fraction to the number of gallium atoms per cubic meter. We can use Avogadro's number, to make this conversion.

Number of gallium atoms per cubic meter = Atomic fraction of gallium × Avogadro's number.

Mass of gallium per cubic meter = Number of gallium atoms per cubic meter × (Atomic mass of gallium / 1000)

Therefore, the concentration of gallium in kilograms per cubic meter is equal to the calculated mass of gallium per cubic meter.

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Answer 2

Answer:

Final answer:

The concentration of gallium in kilograms per cubic meter can be calculated using the atomic mass of gallium and Avogadro's number.

Explanation:

To calculate the concentration of gallium in kilograms per cubic meter, we can use the atomic mass of gallium and Avogadro's number. The concentration in kilograms per cubic meter can be found using the formula:

Concentration (kg/m³) = Concentration (% by mass) x Density (g/cm³) x Atomic Mass (g/mol) / 1000 x Avogadro's Number

First, convert the concentration from at% (atomic percent) to % by mass. Since gallium has an atomic mass of 69.7 g/mol, we can use this value to find the concentration in kilograms per cubic meter.

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How many Na cations are combined with each -2 anion in the compound formulas?

Answers

In ionic compounds, the number of cations (positively charged ions) and anions (negatively charged ions) that combine in a compound is determined by the charge balance.

For example, sodium (Na) has a charge of +1 because it loses one electron to become stable, while anions like those with a -2 charge gain two electrons to become stable.

To balance the charges, you would need two sodium cations (Na+) to combine with one -2 anion. This ensures that the overall charge of the compound is neutral.

So, in compounds with a -2 anion, you would typically find two sodium cations (Na+) combined with each -2 anion.

The constant-pressure specific heat of air at 25°C is 1.005 kJ/kg °C. Express this value in kJ/kg-K. J/g °C, kcal/kg-°C, and Btu/lbm-°F.

Answers

Answer:

Cp= 1.005 kJ/kg °C = 1.005 kJ/(kg*K) = 1.005 J/g°C = 4.206 J/g°C = 0.776 BTU/lb°F

Explanation:

for the specific heat

1) Cp= 1.005 kJ/kg °C * (1 °C/ 1 K) (temperature differences) = 1.005 kJ/(kg*K)

2) Cp= 1.005 kJ/kg °C * (1000 J/ kJ)* (1 kg/1000 gr) = 1.005 J/g°C

3) Cp= 1.005 kJ/kg °C * (4.186 kcal/kJ) = 4.206 J/g°C

4) Cp= 1.005 kJ/kg °C * (1 BTU/1.055 kJ)* (0.4535 kg/lb)*(1.8°C/°F)= 0.776 BTU/lb°F

No one's even answering, so i'll just uh leave this here

Answers

Answer:

answering what???

Explanation:

Answer:

I answered

Explanation:

Supply the volume of insoluble substance from the displaced liquid Displaced liquid: 274 ml

Volume: ? L

Answers

1 L ----------- 1000 mL
? ------------- 274 mL

L = 274 * 1 / 1000

= 0.274 L

hope this helps!

Which formula represents an unsaturatedorganic compound?
(1) CH4 (3) C3H8
(2) C2H4 (4) C4H10

Answers

Answer: (2) $C_2H_4$

Explanation: Unsaturated organic compounds are those compounds which contains carbon-carbon double or triple bond.

Saturated organic compounds are those compounds which contains carbon-carbon single bond.

$CH_4$ , $C_3H_8$ and $C_4H_10$ are all alkanes having general formula $C_nH_(2n+2)$ containing single bonds.

$C_2H_4$ is an alkene having general formula $C_nH_(2n)$ containing double bonds.

The only saturated hydrocarbons are Alkanes: $C_(n) H_(2n+2)$

From that we can see that:
CH4, C3H8 and C4H10 are saturated.

Therefore:
C2H4 is unsaturated. Answer is (2).

If a sample of gas in a rigid container has a temperature of 28.1°C at pressure of 121.2kPa.What will the pressure increase to if heated to a temperature of 89.3°C?

Answers

Answer:

3,495.02‬

Explanation: TRY THAT FOR AN ANSWER

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