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nordsb [41]
3 years ago
9

A)State the number of valence electrons for the element O?

Chemistry
1 answer:
sergejj [24]3 years ago
7 0
A) number of valence electrons is 6
B) number of protons is same as number of electrons
C) That elements is berilium
D)I think it is Cl-37 one
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olga2289 [7]

Answer:

im confused on what you mean

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3 0
3 years ago
Which of the following would be found ONLY in plant cells
marin [14]

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chloroplasts, cell walls, or intracellular vacuoles

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5 0
3 years ago
An experiment shows that a 250 ?ml gas sample has a mass of 0.430 g at a pressure of 736 mmhg and a temperature of 28 ?c.
dmitriy555 [2]
What we're looking for here is the gas sample's molar mass given its mass, pressure, volume, and temperature. Recalling the gas law, we have

PV = nRT or
n = \frac{PV}{RT}

where R is <span>0.08206 L atm / mol K, P is the given pressure, T is the temperature, and V is the volume.

Before applying the values given, it is important to make sure that they are to be converted to have consistent units with that of R. 
</span>
Thus, we have

P = 736/ 729 = 0.968 atm
T = 28 + 273.15 = 301.15 K
V = 250/1000 = 0.250 L

Now, applying these converted values into the gas law, we have

n = \frac{(0.968 atm)(0.250 L)}{(0.08206 L.atm/mol.K)(301.15 K)}
n = 0.00979 moles

Given that the mass of the sample is 0.430 g, we have

molar mass = \frac{mass}{number of moles} 
molar mass = \frac{0.430}{0.00979} = 43.9

Thus, the gas sample has a molar mass of 43.9 g/mol.
4 0
3 years ago
Which type of fat is a solid at room temperature and does not have double bonds between carbon
melamori03 [73]

Answer:

Saturated Fats

Explanation:

Saturated fats are all of the above.

Also, Saturated fat is very unhealthy. Only consume it in small amounts.

7 0
3 years ago
Read 2 more answers
5. Why doesn't the air at a frontal boundary mix?​
Vsevolod [243]

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At a front, the two air masses have different densities, based on temperature, and do not easily mix. One air mass is lifted above the other, creating a low pressure zone.

Explanation:

Hope this helps!

4 0
3 years ago
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