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Sindrei [870]
4 years ago
12

If air is heated to 100F above normal room air temperature, what happens to the air?

Chemistry
1 answer:
Sholpan [36]4 years ago
7 0

Answer:

The molecules will start to move faster and rise while pushing the slower molecules down until they are heated and when the pressure finally builds up and is released

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A sample of iron has a mass of 46.8 grams and a volume of 6 cm3. What is the density of iron?
il63 [147K]
The equation for density id D=M/V, which is density is equal to mass over volume. The mass (46.8 g) divided by the volume (6 cm^3), is the density. I calculated it to be 7.8 g/cm^3
6 0
3 years ago
Read 2 more answers
What is the mass in grams of 0.00125 mole of sodium Na=23​
Anit [1.1K]

Answer:

0.03g

Explanation:

Given parameters:

Number of moles of Na = 0.00125mole

Unknown:

Mass in grams of Na = ?

Solution:

To find the mass of this substance, we simply multiply the number of moles with the given molar mass of Na.

 Mass of Na  = number of moles x molar mass

 Mass of Na  = 0.00125 x 23   = 0.03g

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3 years ago
Part a how many carbon atoms are in a 2-carat pure diamond that has a mass of 0.40 g . express your answer using two significant
shutvik [7]

We have to calculate the number of carbon atoms present in 2-carat pure diamond.

The number of carbon atoms present in 2-carat pure diamond is: 0.19 X 10²³ number of carbon atom.

Diamond is one allotrope of carbon. Atomic mass of carbon is 12.

Mass of one mole carbon atom is 12 g. One mole carbon contains Avogadro's number i.e, 6.023 X 10²³ number of atoms.

0.40 g diamond contains 0.40/12 moles= 0.033 moles of carbon atom.

So, number of carbon atoms present in 0.40 g diamond (i.e, 0.033 mole diamond) is 0.033 X 6.023 X 10²³= 1.98 X 10²²=0.19 X 10²³ .

Therefore, 0.19 X 10²³ number of carbon atoms are in a 2-carat pure diamond that has a mass of 0.40 g

3 0
4 years ago
what is the structure of XeO2F2???i know its hybridization as sp3d but cannot quite understand its diagram in free space,help an
skelet666 [1.2K]
The shape of XeO₂F₂ is Trigonal bi-pyramidal see-saw tetrahedron (see attached pictures)
- As you said the hybridization of Xe here is sp³d so its geometry has to be Trigonal bi-pyramidal in which F atom located on axial positions but for the final shape we exclude lone pair on Xe to give see-saw shape (see second picture) 
- Remember that we have 5 pairs (4 bond pairs + 1 lone pair) and we have to place lone pair at equatorial position.

6 0
3 years ago
The following image is of a diatom. It lives in water and gets food from photosynthesis. It is encased in a hard shell made of s
Serga [27]

the correct answer is A

A diatom is a(n) <u>Singled-celled organism</u> because it has <u>only one cell.</u>

<u />

<em>(study island)</em>

7 0
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