Answer:
The heat needed to warm 25.3 g of copper from 22°C to 39°C is 165.59 Joules.
Explanation:
![Q=mc\Delta T](https://tex.z-dn.net/?f=Q%3Dmc%5CDelta%20T)
Where:
Q = heat absorbed or heat lost
c = specific heat of substance
m = Mass of the substance
ΔT = change in temperature of the substance
We have mass of copper = m = 25.3 g
Specific heat of copper = c = 0.385 J/g°C
ΔT = 39°C - 22°C = 17°C
Heat absorbed by the copper :
![Q=25.3 g\times 0.385 J/g^oC\times 17^oC=165.59 J](https://tex.z-dn.net/?f=Q%3D25.3%20g%5Ctimes%200.385%20J%2Fg%5EoC%5Ctimes%2017%5EoC%3D165.59%20J)
The heat needed to warm 25.3 g of copper from 22°C to 39°C is 165.59 Joules.
Hello,
Here is your answer:
The proper answer to this question is "deposition".
Your answer deposition.
If you need anymore help feel free to ask me!
Hope this helps!
Answer:
![V_{HCl}=48.0 mL](https://tex.z-dn.net/?f=V_%7BHCl%7D%3D48.0%20mL)
Explanation:
Hello!
In this case, since the reaction between calcium hydroxide and hydrochloric acid shows a 2:1 mole ratio between them:
![2HCl+Ca(OH)_2\rightarrow CaCl_2+2H_2O](https://tex.z-dn.net/?f=2HCl%2BCa%28OH%29_2%5Crightarrow%20CaCl_2%2B2H_2O)
We need to use the following mole ratio:
![2n_{Ca(OH)_2}=n_{HCl}](https://tex.z-dn.net/?f=2n_%7BCa%28OH%29_2%7D%3Dn_%7BHCl%7D)
That can be written in volumes and concentrations:
![2M_{Ca(OH)_2}V_{Ca(OH)_2}=M_{HCl}V_{HCl}](https://tex.z-dn.net/?f=2M_%7BCa%28OH%29_2%7DV_%7BCa%28OH%29_2%7D%3DM_%7BHCl%7DV_%7BHCl%7D)
Thus, we solve for the volume of HCl as it is the unknown:
![V_{HCl}=\frac{2M_{Ca(OH)_2}V_{Ca(OH)_2}}{M_{HCl}}](https://tex.z-dn.net/?f=V_%7BHCl%7D%3D%5Cfrac%7B2M_%7BCa%28OH%29_2%7DV_%7BCa%28OH%29_2%7D%7D%7BM_%7BHCl%7D%7D)
Therefore, we plug in to obtain:
![V_{HCl}=\frac{2*0.120M*25.0mL}{0.150M} \\\\V_{HCl}=48.0 mL](https://tex.z-dn.net/?f=V_%7BHCl%7D%3D%5Cfrac%7B2%2A0.120M%2A25.0mL%7D%7B0.150M%7D%20%5C%5C%5C%5CV_%7BHCl%7D%3D48.0%20mL)
Best regards!
Answer:
Because of increase in enzyme activity
Explanation:
Increase in salt concentration of sodium alginate yeast can lead to an increase in enzyme reaction/activity, causing the yeast spheres to rise up faster to the surface.
Answer:
Explanation:
Overuse of antibiotics leads to bacteria's resistance against our drugs. This is increasing at an alarming rate and the reason is that overuse of antibiotics kills bacteria that lack the "resistance" gene or gene that can help them survive the antibiotics (similar is the case for insects that die to insecticides). But, some bacteria can have random mutations in their gene that can help them survive the antibiotic (similar is the case for some insects that can survive the insecticide), thus the surviving bacteria give rise to next generation of bacteria that are resistant to the given antibiotic (similar to how insects that survive the insecticide give birth to new insects that are resistant to insecticide too). Soon, every generation adds new antibiotic resistant bacteria (or new insecticide resistant insects in the case of insects) which is dangerous for all of life on this planet. Therefore, both are similar in the sense that new generations of these organisms will be resistant to our weapons against them.