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spin [16.1K]
3 years ago
14

scientist are always learning new things. which of the following shows how scientist use observations to gain new understanding

about the world?
Chemistry
2 answers:
Step2247 [10]3 years ago
8 0
Please provide whatever follows your question. Without it we cannot answer the question.
Black_prince [1.1K]3 years ago
5 0

What are the options? I can not help unless yo provide this information.


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Question attached ! asap please
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Answer:

A. copper is highly water soluble. It will turn into 5 different hydrates as it absorbs more and more water.

b. Glycerol is easily soluble in water, due to the ability of the polyol groups to form hydrogen bonds with water molecules

c. octane is considered to be non-polar, it will not be soluble in water, since water is a polar solvent. This will happen because octane (hydrocarbons in general) contains neither ionic groups, nor polar functional groups that can interact with water molecules.

d. Nitric acid decomposes into water, nitrogen dioxide, and oxygen, forming a brownish yellow solution.

e. Barium carbonate is a white powder. It is insoluble in water and soluble in most acids

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3 years ago
What is the relationship between the period and the orbital radius? Select one: a. It is a direct relationship- As the period in
balu736 [363]

I'm pretty sure it's A, but then again I'm only in 8th grade. Sorry if this doesn't help:(

6 0
3 years ago
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The mass percentage of hydrochloric acid within a solution is 15.00%. given that the density of this solution is 1.075 g/ml, fin
Morgarella [4.7K]

Given the mass percentage of HCl solution = 15.00 %

This means that 15.00 g HCl is present in 100 g solution

Moles of HCl = 15.00 gHCl*\frac{1 mol HCl}{36.46 g HCl} =0.411molHCl

Density of the solution = 1.075 g/mL

Calculating the volume of solution from density and mass:

100 g *\frac{1mL}{1.075 g} =93.0 mL

Converting volume from mL to L:

93.0 mL * \frac{1 L}{1000 mL} =0.093 L

Calculating the molarity of HCl solution from moles and volume:

\frac{0.411 mol}{0.093 L} =4.42 mol/L

8 0
3 years ago
The overall change in enthalpy of a reaction depends only on
serious [3.7K]
<h3><u>Answer;</u></h3>

A. the reactants and the products.

<h3><u>Explanation</u>;</h3>
  • The enthalpy of a reaction is the heat released or absorbed by a reaction at constant pressure.
  • Enthalpy is important as it tells us the amount of heat energy present in a system. In chemical reactions it tells us the amount of heat energy lost or gained.
  • <em><u>Changes in enthalpy are determined as the reactants are converted into products. Therefore, enthalpy depends on the reactants and the products. In other words it depends on the heat of reactants and that of products.</u></em>
4 0
3 years ago
Read 2 more answers
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