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stich3 [128]
3 years ago
8

Help? It would honestly mean a lot :(

Chemistry
1 answer:
melomori [17]3 years ago
6 0

Answer:

1 1

5 2

6 1

8 3

10 3

6 3

9 3

13 3

Explanation:

First of you add the subscripts (the little numbers after the letters) and multiply the big numbers before the letters together to get the number of atoms

For Example:

O= 1 atom

Si{2}= 2 atoms

Mg{5}C{6}= 11 atoms

3Na{2}= 6 atoms

O(SiNa){2}= OSi{2}Na{2}= 5 atoms

Each Capital letter is a new Element

For Example:

O = 1 Element

NaSi = 2 Elements

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A solution is made by dissolving 10.20 grams of glucose (C6H12O6) in 355 grams of water. What is the freezing-point depression o
Stolb23 [73]
The freezing point constant means that the temperature depression when adding one mole of the solute. The mole number of the solute is 10.20/180=0.0567 mol. So the answer is 1.86*0.0567=0.105 ℃.
7 0
3 years ago
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What will be the volume of a gas sample at 337 K if its volume at 237 K is 12.0 L? Round your answer to 1 digit after the decima
oksano4ka [1.4K]

Answer:

17.1 L

Explanation:

V1/T1=V2/T2

V2=(V1*T2)/T1

V2= (12.0L * 337K)/237K

V2=17.1L

7 0
4 years ago
Identity the step that is not part of the scientific method.
horrorfan [7]

Options:

conduct an experiment

form a hypothesis

draw a conclusion

state the cause

Answer:

'<u>State the cause'</u> is not part of the scientific method.

Explanation:

The scientific method has three wholistic steps:

  • Test the hypothesis
  • Make observations from the experiment to the hypothesis
  • Draw a conclusion or prediction from the experimental results.

A cause is neither a scientific term nor is it part of the  processes of experimentation.

I hope this was helpful.

6 0
3 years ago
The validity of documents was marked by fingerprinting in what time period?
Len [333]

Answer before the 1800s

Explanation:

7 0
3 years ago
At 25 °C, only 0.0990 mol of the generic salt AB3 is soluble in 1.00 L of water. What is the Ksp of the salt at 25 °C? AB3(s)↽−−
maksim [4K]

Answer:

Ksp=2.59x10^{-3}

Explanation:

Hello,

In this case, given the 0.0990 moles of the salt are soluble in 1.00 L of water only, we can infer that the molar solubility is 0.099 M. Next, since the dissociation of the salt is:

AB_3\rightleftharpoons A^{3+}+3B^-

The concentrations of the A and B ions in the solution are:

[A]=0.099 \frac{molAB_3}{L}*\frac{1molA}{1molAB_3}  =0.0099M

[B]=0.099 \frac{molAB_3}{L}*\frac{3molB}{1molAB_3}  =0.000.297M

Then, as the solubility product is defined as:

Ksp=[A][B]^3

Due to the given dissociation, it turns out:

Ksp=[0.099M][0.297M]^3\\\\Ksp=2.59x10^{-3}

Regards.

4 0
4 years ago
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