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3 years ago

The two factors that cause technology to progress

1 answer:

8 0

Research and new advancements in discoveries like fingerprint unlock for phones.And 3d printers.They were made by researching and discovering new things.

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What is a face atom?

gavmur [86]

Answer:

Explanation:

An atom on a face is shared by two unit cells, so only half of the atom belongs to each of these cells. An atom on an edge is shared by four unit cells, and an atom on a corner is shared by eight unit cells.

3 0

3 years ago

Water with a salinity of 20 g/L has a density of<br> _kg/m<br> 3

Nataly [62]

Answer:

20 kg/m3

Explanation:

8 0

3 years ago

List the ideas of dalton

Romashka-Z-Leto [24]

Atoms has never been seen,nor experimentally detected. Their existence remained hypothetical.

5 0

3 years ago

A sample of ammonia is found to occupy 0.250 L under laboratory conditions of 27 °C and 0.850 atm. Find the volume of this sampl

Rzqust [24]

Answer:

0.193 L

Explanation:

Step 1:

Data obtained from the question.

Initial Volume (V1) = 0.250 L

Initial temperature (T1) = 27°C

Initial pressure (P1) = 0.850 atm

Final volume (V2) =?

Final temperature (T2) = 0°C

Final pressure (P2) = 1.00 atm

Step 2:

Conversion of celsius temperature to Kelvin temperature.

Temperature (Kelvin) = temperature (celsius) + 273

Initial temperature (T1) = 27°C = 27°C + 273 = 300K

Final temperature (T2) = 0°C = 0°C + 273 = 273K

Step 3:

Determination of the new volume of the sample of ammonia gas.

The new volume can be obtain by using the general gas equation as shown below:

P1V1/T1 = P2V2/T2

0.850x0.250/300 = 1xV2/273

Cross multiply to express in linear form

300 x V2 = 0.850x0.250x273

Divide both side by 300

V2 = (0.850x0.250x273) /300

V2 = 0.193 L

Therefore, the volume of the sample at 0 °C and 1.00 atm is 0.193 L

6 0

3 years ago

Determine the number of valence electrons in pcl₃ and then draw the corresponding lewis structure.

Nikolay [14]

The number of valence electrons in $PCl_{5}$ will be 26.

The atom's outermost inhabited shell is where valence electrons are found. They are significant because they have a major impact on how an atom's chemical characteristics are determined.

The number of valence electron in P in 5 and number of valence electron in Cl is 7. There are one molecule of P and three molecule of Cl in $PCl_{5}$ molecule. By adding all valence electrons , the total number of valance electrons will be 26.

The Lewis structure of $PCl_{5}$ is shown as:

Therefore, the number of valence electrons in $PCl_{5}$ will be 26.

To know more about valence electrons

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7 0

2 years ago