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snow_lady [41]
3 years ago
8

How many electrons are drawn for a electron dot structure for carbon?

Chemistry
1 answer:
koban [17]3 years ago
5 0
Answer:

6

Explanation:

yeah i’m pretty sure 2 in the first shell and 4 in the second
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A 2.0 L party balloon at 98 kPa is taken to the top of a mountain where the pressure is 75
PtichkaEL [24]

Answer:

2.61 L

Explanation:

p1v1 = p2v2

p1v1 / p2 = v2

98 * 2 / 75 = v2 = 2.61 L

7 0
3 years ago
Which statement describes why radiocarbon dating has an upward limit of 50 000 years
tekilochka [14]
Because <span> The half-life of carbon-14 is around 5,700 years. So, by measuring the half-live of the sample, we could predict how old the sample actually is.
</span><span>After 50,000 years there is  probably less than 1% of the original C-14 left which make it much more accurate to measure, so, the upward limit is put on 50,000 years.</span>
7 0
3 years ago
A molecule is known to have a molar absorptivity of 18,650 at a certain wavelength. A spectrometer is tuned to this wavelength a
iren2701 [21]

Answer:

17,932.69 g/mol is the molecular weight of the substance.

Explanation:

Using Beer-Lambert's law :

Formula used :

A=\epsilon \times c\times l

where,

A = absorbance of solution = 1.04

c = concentration of solution =?

l = length of the cell = 1 cm

\epsilon = molar absorptivity of this solution = 18,650 M^{-1} cm^{-1}

Now put all the given values in the above formula, we get the molar absorptivity of this solution.

1.04=18,650 M^{-1} cm^{-1}\times c)\times (1cm)

c = 5.576\times 10^{-5} M

Concentration=\frac{\text{Mass of compound}}{\text{Molecular mass of compound}\times V}

V = Volume of the solution in L

Molecular weight of the substance = x

V = 100 mL = 0.1 L

Mass of the substance = 100 mg = 0.1 g

5.576\times 10^{-5} M=\frac{0.1 g}{x\times 0.1 L}

x = 17,932.69 g/mol

17,932.69 g/mol is the molecular weight of the substance.

6 0
3 years ago
8)
8_murik_8 [283]

Answer:

1.67 M

Explanation:

75.0 g *1 mol/180 g = (75/180) mol of glucose

250 mL = 0.250 L

(75/180)/0.250 = 1.67 mol/L =1.67 M

4 0
3 years ago
U ever get an answer
den301095 [7]
Yesn’t. they are either wrong or links
6 0
2 years ago
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