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Marina CMI [18]
2 years ago
7

Is it possible to change a scientific theory?​

Chemistry
2 answers:
Crank2 years ago
5 0
It ain’t A it’s C because scientific theories do change if evidence is found.
Crazy boy [7]2 years ago
3 0

Answer:

I think the first option is the answer

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Which six elements are generally considered metalloids
chubhunter [2.5K]

Answer:

boron, silicon, germanium, arsenic, antimony, and tellurium

4 0
3 years ago
Read 2 more answers
1. The diagram above shows the repeating groups of atoms that make up two samples. Will the
serious [3.7K]

Answer:

Will likely be the same

Explanation:

We can see in both pictures there is a black molecule and a red molecule. However, we also have a purple molecule in one image and a yellow in the other. It would LIKELY be the same because we have more of the same molecules then more different molecules. Hope this helps

4 0
3 years ago
The normal freezing point of water (H2O) is 0.00 oC and its Kf value is 1.86 oC/m. A nonvolatile, nonelectrolyte that dissolves
adelina 88 [10]

Answer:

3.74g of ethylene glycol must be added to decrease the freezing point by 0.400°C

Explanation:

One colligative property is the freezing point depression due the addition of a solute. The equation is:

ΔT=Kf*m*i

<em>Where ΔT is change in temperature = 0.400°C</em>

<em>Kf is freezing point constant of the solvent = 1.86°C/m</em>

<em>m is molality of the solution (Moles of solute / kg of solvent)</em>

<em>And i is Van't Hoff constant (1 for a nonelectrolyte)</em>

Replacing:

0.400°C =1.86°C/m*m*1

0.400°C / 1.86°C/m*1 = 0.215m

As mass of solvent is 280.0g = 0.2800kg, the moles of the solute are:

0.2800kg * (0.215moles / 1kg) = 0.0602 moles of solute must be added.

The mass of ethylene glycol must be added is:

0.0602 moles * (62.10g / mol) =

3.74g of ethylene glycol must be added to decrease the freezing point by 0.400°C

<em />

6 0
2 years ago
1) A block of aluminum has a mass of 40.5
-Dominant- [34]

Answer:

15 ml

Explanation:

\frac{40,5}{y}=\frac{2,7}{1}

2,7y=40,5

y=40,5/2,7=405/27= 15ml

7 0
3 years ago
Match each group on the periodic table with its description. HELP ME PLS
Artist 52 [7]
Very reactive nonmetals.
3 0
2 years ago
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