Answer:
your answer second once is correct
Explanation:
don't worry! have a good day dear!!..
Closest to Mg: Neon Must lose 2 electrons?
Closest to S: Argon Must gain 2 electrons?
I know the noble gases are right, but I'm not 100% sure if you just need to add/subtract electrons.
Answer:
![49.4^{\circ}](https://tex.z-dn.net/?f=49.4%5E%7B%5Ccirc%7D)
Explanation:
We are given that
Stress,![\sigma_1=60 MPa=60\times 10^6 Pa](https://tex.z-dn.net/?f=%5Csigma_1%3D60%20MPa%3D60%5Ctimes%2010%5E6%20Pa)
Temperature,![T_0=20^{\circ}](https://tex.z-dn.net/?f=T_0%3D20%5E%7B%5Ccirc%7D)
Stress,![\sigma_2=5MPa=5\times 10^6 Pa](https://tex.z-dn.net/?f=%5Csigma_2%3D5MPa%3D5%5Ctimes%2010%5E6%20Pa)
![\alpha=17\times 10^{-6}/^{\circ}C](https://tex.z-dn.net/?f=%5Calpha%3D17%5Ctimes%2010%5E%7B-6%7D%2F%5E%7B%5Ccirc%7DC)
Modulus of elasticity=![E=110GPa=110\times 10^9 Pa](https://tex.z-dn.net/?f=E%3D110GPa%3D110%5Ctimes%2010%5E9%20Pa)
We have to find the temperature must the wire be heated.
![T=T_0-\frac{\Delta\sigma}{E\alpha}](https://tex.z-dn.net/?f=T%3DT_0-%5Cfrac%7B%5CDelta%5Csigma%7D%7BE%5Calpha%7D)
Using the formula
![T=20-\frac{(5-60)\times 10^6}{110\times 10^9\times 17\times 10^{-6}}](https://tex.z-dn.net/?f=T%3D20-%5Cfrac%7B%285-60%29%5Ctimes%2010%5E6%7D%7B110%5Ctimes%2010%5E9%5Ctimes%2017%5Ctimes%2010%5E%7B-6%7D%7D)
![T=49.4^{\circ}](https://tex.z-dn.net/?f=T%3D49.4%5E%7B%5Ccirc%7D)
Answer:
C. CH₄+2O₂ →2H₂O+CO₂
Explanation:
This is a popular combustion reaction.
C. CH₄+2O₂ →2H₂O+CO₂
In combustion, hydrocarbons burn in the presence of oxygen gas and they produce water and carbon dioxide only. The process is accompanied with the release of energy.
We simply say for the above reaction that:
One molecule of methane(CH₄) reacts with two molecules of oxygen gas(O₂) to produce two molecules of water(H₂O) and one molecule of carbon dioxide only
I think it would be 1, 4, 5! Also I love your profile picture!