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Aloiza [94]
3 years ago
5

Marveldude pls repost what u said it got deleted :/

Chemistry
1 answer:
ad-work [718]3 years ago
5 0

Answer:

position: one compound becomes 2 separate elements

synthesis: two seperate elements combining into 1 compound

single replacement: a separate element and compound switch a component

double displacement: two compounds switch elements

this is just kinda restating what red text said but this is simpler ig

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The following solutions are prepared by dissolving the requisite amount of solute in water to obtain the desired concentrations.
lions [1.4K]

Answer:

1M MgCl₂ > 1M KCl > 1M C₁₂H₂₂O₁₁

Explanation:

The osmotic pressure (π) is the pressure needed to impede the osmose, it means that it's the necessary pressure to prevent the solvent to go through a membrane.

It can be calculated by:

π = M*R*T*i

Where M is the molarity of the solution (mol/L), R is the ideal gas constant, T is the temperature, and i the van't Hoff factor.

This factor is a way to correct the number of particles that are dissolved in a solute, and it can be calculated by:

i = 1 + α*(q - 1)

Where α is the degree of dissociation of a substance, and q is the number of moles of each ion released in a solution. Thus, covalent compounds that didn't ionize, such as sugars, have only one particle, and q = 1, and so i =1.

Because all the substances have the same molarity (1 M) and are at the same temperature, let's analyze the value of i, which is directly proportional to π.

C₁₂H₂₂O₁₁ is a sugar that didn't ionize, so π = 1;

Both KCl and MgCl₂ are soluble salts and will dissociate completely (α = 1), but MgCl₂ will have 3 particles (Mg²⁺ + 2Cl⁻), and KCl only one particle (K⁺ and Cl⁻), so qMgCl₂ > 1KCl, and so πMgCl₂ > πKCl, which will be higher than 1.

1M MgCl₂ > 1M KCl > 1M C₁₂H₂₂O₁₁

5 0
3 years ago
What has the biggest impact on a region,weather or atmosphere.
andreev551 [17]

<em>Weather.</em>

<em>You see how the weather is in a certain place can determine how the plant life and just life in general would live. It can also effect people. Let's say there was a drought somewhere, this would effect people whereas, they could lose a significant source of water and food because it would make them likely have to find a new water source or the animals would. Weather also effects the land in harmful ways. For example when it floods, the ground gets muddy but can also get so muddy below a certain area, that the soil entirely collapses into the ground (that would be a sinkhole).</em>

<em>There are picture below to show you some of the effects.</em>

<em>-R3TR0 Z3R0</em>

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3 years ago
If I have 6.02x10^23 atoms of silicon, how many grams of silicon do I have?
Cerrena [4.2K]
You have 1 mol of silicon atoms.  Therefore you have its atomic mass in grams.  The answer is 28.055 g of silicon.
8 0
3 years ago
SCIENTISTS CAN USE SPECTRA ANALYSIS OF STARS TO DETERMINE WHICH OF THE FOLLOWING? SELECT ALL THAT APPLY
monitta

All of the above

Explanation:

Scientists can use spectra analysis of stars to determine:

  • Surface temperature of the star
  • Core temperature of stars
  • Elements in the core of the star
  • Elements on the surface of the star

Spectra analysis is the analysis or interpretation of the electromagnetic emissions from a matter.

They are very useful in indirect and descriptive studies of astronomical bodies since it might be very difficult of come in close contact with them.

Emissions spectrum typifies every matter in nature since all bodies emits specific radiations.

Using spectra analysis, scientists can determine the temperature that typifies an emission and the elements that might might be producing such signatures.

learn more:

Spectral analysis brainly.com/question/1857156

#learnwithBrainly

4 0
3 years ago
Sodium hydroxide and water will react at room temperature. What does this indicate about its activation energy? A. The activatio
RoseWind [281]

Answer: high

Explanation:

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4 years ago
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