Answer:
Lower
Explanation:
Surface tension occurs because molecules at the surface do not have molecules above them, so they cohere more strongly to their neighbours.
The stronger cohesive forces make it more difficult to move an object through the surface than when it is beneath the surface.
The attractive forces in water are strong because of hydrogen bonding.
A hexane molecule is nonpolar, so the only attractions are the weak London dispersion forces.
The cohesive forces at the surface are much lower than those in water, so the surface tension of hexane is lower than that of water at the sane temperature.
Answer:
Al + HCl → AlCl₃ + H₂
Its single displacement reaction.
Explanation:
Chemical equation:
2NH₄NO₃ → 2N₂ + 4H₂O + O₂
It is the decomposition reaction in which ammonium nitrate decompose to give nitrogen , water and oxygen.
Chemical equation:
2H₂O₂ → 2H₂O + O₂
It is the decomposition reaction in which hydrogen peroxide decompose to give water and oxygen.
Chemical equation:
2KCl → 2K + Cl₂
It is the decomposition reaction in which potassium chloride decompose to give its constituent elements potassium and chlorine.
Chemical equation:
2Al +6 HCl → 2AlCl₃ +3 H₂
This is single replacement reaction in which aluminium react with HCl and form aluminium chloride and hydrogen.
Answer:
1. 25 moles water.
2. 41.2 grams of sodium hydroxide.
3. 0.25 grams of sugar.
4. 340.6 grams of ammonia.
5. 4.5x10²³ molecules of sulfur dioxide.
Explanation:
Hello!
In this case, since the mole-mass-particles relationships are studied by considering the Avogadro's number for the formula units and the molar mass for the mass of one mole of substance, we proceed as shown below:
1. Here, we use the Avogadro's number to obtain the moles in the given molecules of water:
![1.5x10^{25}molecules*\frac{1mol}{6.022x10^{23}molecules} =25 molH_2O](https://tex.z-dn.net/?f=1.5x10%5E%7B25%7Dmolecules%2A%5Cfrac%7B1mol%7D%7B6.022x10%5E%7B23%7Dmolecules%7D%20%3D25%20molH_2O)
2. Here, since the molar mass of NaOH is 40.00 g/mol, we obtain:
![1.2mol*\frac{40.00g}{1mol} =41.2g](https://tex.z-dn.net/?f=1.2mol%2A%5Cfrac%7B40.00g%7D%7B1mol%7D%20%3D41.2g)
3. Here, since the molar mass of C6H12O6 is 180.15 g/mol:
![45g*\frac{1mol}{180.15g}=0.25g](https://tex.z-dn.net/?f=45g%2A%5Cfrac%7B1mol%7D%7B180.15g%7D%3D0.25g)
4. Here, since the molar mass of ammonia is 17.03 g/mol:
![20mol*\frac{17.03g}{1mol}=340.6g](https://tex.z-dn.net/?f=20mol%2A%5Cfrac%7B17.03g%7D%7B1mol%7D%3D340.6g)
5. Here, since the molar mass of SO2 is 64.06 g/mol:
![48g*\frac{1mol}{64.06g} *\frac{6.022x10^{23}molecules}{1mol} =4.5x10^{23}molecules](https://tex.z-dn.net/?f=48g%2A%5Cfrac%7B1mol%7D%7B64.06g%7D%20%2A%5Cfrac%7B6.022x10%5E%7B23%7Dmolecules%7D%7B1mol%7D%20%3D4.5x10%5E%7B23%7Dmolecules)
Best regards!
1. Ask a question. Questions can vary from any subject or topic. Why is the sky blue? What makes leaves turn green? How long will a detached lemon last in the sun before it rots?
2. Now, form a hypothesis. What do you think is the answer to your question? Write it down.
3. Next, the fun part. Perform an experiment to deduce the answer to your scientific question, and make sure to take notes.
4. Draw a conclusion based on your experiment. What happened?
5. Finally, compare your conclusion with your hypothesis. Did you expect the conclusion that you got? Or were you way out of line?
Hope this helps!
Answer:
option B
Explanation:
<h3>The energy required to go from liquid to gas / water vapour</h3>