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Artist 52 [7]
3 years ago
12

Lowest freezing point: N2, CO, or CO2

Chemistry
1 answer:
Julli [10]3 years ago
7 0

Answer:

N2

Explanation:

CO freezing point is -337 F

CO2 freezing point is -109 F

N2 freezing point is -346F

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A solution prepared by dissolving 0.100 mole of propionic acid in enough water to make 1.00 L of solution is observed to have a
torisob [31]

Answer:

C) k_a=1.3\times 10^{-5}

Explanation:

pH is defined as the negative logarithm of the concentration of hydrogen ions.

Thus,  

pH = - log [H⁺]

The expression of the pH of the calculation of weak acid is:-

pH=-log(\sqrt{k_a\times C})

Where, C is the concentration = 0.5 M

Given, pH = 2.94

Moles = 0.100 moles

Volume = 1.00 L

So, Molarity=\frac{Moles}{Volume}=\frac{0.100}{1.00}\ M=0.100\ M

C = 0.100 M

2.94=-log(\sqrt{k_a\times 0.100})

\log _{10}\left(\sqrt{k_a0.1}\right)=-2.94

\sqrt{0.1}\sqrt{k_a}=\frac{1}{10^{2.94}}

k_a=1.3\times 10^{-5}

4 0
3 years ago
How many atoms are in one body-centered cubic unit cell of a metal?
Mashcka [7]

Answer:

Option B - 2

Explanation:

In Crystal lattices, there are different types of unit cells namely;

- Hexagonal Closest Packed (HCP)

- Face Centred Cubic (FCC)

- Body Centred Cubic (BCC)

- Simple Centred Cubic (SC)

Now, each of them have a coordination number and also number of atoms per unit cell.

For this question, we are restricted to the body-centered cubic (bcc) unit cell which has a coordination number of 8 and contains 2 atoms per unit cell.

3 0
4 years ago
Calculate the mass of a liquid with a density of 3.2 g/ml and a volume of 25 ml
erma4kov [3.2K]
The equation is x/25=3.2
                         *25    *25
                         -------------
                          x=80g
4 0
3 years ago
Where does most of our heat come from?
Tpy6a [65]

Answer:

the cells in your body

Explanation:

Most people that i have asked this similar question to, have said the sun. It's not the sun because the sun disappears at night. Your body produces heat because your cells are burning up energy.

3 0
2 years ago
In the atmosphere water vapor condenses to form clouds.
levacccp [35]
False , they form water or ice crystals 

4 0
3 years ago
Read 2 more answers
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